单项选择题
It weighs less than three pounds and is hardlymore interesting to look at than an overly ripecauliflower. ___________________________.It has created poetry and music, planned andexecuted horrific wars, and devised intricatescientific theories. It thinks and dreams, plotsand schemes, and easily holds more informa?tion than all the libraries on Earth.
A.The human brain is made of gelatinousmatter and contains no nerve endings
B.The science of neurology has found a wayto map the most important areas of thehuman brain
C.Nevertheless, the human brain is the mostmysterious and complex object on Earth.
D.However, scientists say that each personuses only 10% of his or her brain over thecourse of a lifetime!