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The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

                                                                                          Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                            Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                           Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                          Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                               Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                             Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

                                                                             Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                              Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                                Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                              Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

                                                                              Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

                                                                               Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                                Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

                                                                               Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

                                                                               Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日寇) on October28, 2003. Large amounts of charged particles moved 150, 000, 000 kilometers through space toward the (5) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will (6) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is (7) because it is under the protection of the earth’s magnetic field.A solar storm not only affects aircraft but also is a (8) to the environment and humans. The aerosphere and magnetic field of the earth can (9) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can (10) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two (11) of the earth, which affects electricity supply of North America. Overexposure to (12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it (13) we receive ten times the X-ray radiation. It’s really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth (14) a cold. Though this natural force is irresistible, scientists can still (15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard.

Scientists have long struggled to understand what lies at the planet’s center. Direct observation of its center is impossible, so researchers must (1) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves (2) jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist Inge Lehmann studied the waves’ (3) to determine that within Earth’s core of molten (溶化了的) iron lies a solid inner core—but (4) that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann’s inner core was composed mostly (5) iron. Since then, Lehmann’s discovery has (6) conventional Earth science.
But now scientists are challenging traditional theory with new and radical (7) . For example, Earth’s center could actually contain an "inner core within the inner core. " claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave (8) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil (9) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly (10) Earth formed around 4. 8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt; it (11) mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the (12) of the planet," Dziewonski says.
Dziewonski’s idea is tame (温和的) compared to the (13) theories of independent geophysicist J. Marvin Herndon. Earth’s inner core is made not of iron, he claims, but a (14) of nickel and silicon. Herndon has a truly revolutionary notion. Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms (15) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.