航海英语航海气象基本知识章节练习(2018.01.06)

单项选择题
In the Northern Hemisphere，an area of counterclockwise wind circulation surrounded by higher pressure is a（）.
A.low
B.high
C.warm front
D.cold front
单项选择题
The fog produced by warm moist air passing over a cold surface is called（）.
A.conduction fog
B.radiation fog
C.frontal fog
D.advection fog
单项选择题
A hygrometer is a device used for determining（）.
A.the absolute temperature
B.atmospheric pressure
C.wind velocity
D.relative humidity
单项选择题
A frontal thunderstorm is caused by（）.
A.pronounced local heating
B.wind being pushed up a mountain
C.a warm air mass rising over a cold air mass
D.an increased lapse rate caused by advection of warm surface air
单项选择题
Cumulonimbus clouds can produce（）.
A.dense fog and high humidity
B.gusty winds，thunder，rain or hail，and lightning
C.clear skies with the approach of a cold front
D.a rapid drop in barometric pressure followed by darkness
单项选择题
Cloud formations are minimal when the（）.
A.surface temperature and temperature aloft are equal
B.surface temperature and temperature aloft differ greatly
C.barometric pressure is very low
D.relative humidity is very high
单项选择题
A generally circular low pressure area is called a(n)（）.
A.cyclone
B.anticyclone
C.cold front
D.occluded front
单项选择题
The navigable semicircle of a tropical storm in the South Indian Ocean is located on which side of the storm’s track? （）
A.Rear
B.Front
C.Left
D.Right
单项选择题
The form of cloud often known as mackerel sky which is generally associated with fair weather is（）.
A.nimbostratus
B.stratus
C.cirrocumulus
D.cumulonimbus
单项选择题
The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the（）.
A.subtropical high pressure belt
B.intertropical convergence zone
C.doldrum belt
D.polar frontal zone