单项选择题
An aneroid barometer is an instrument（）.
A.used to measure the speed of wind
B.in which the pressure of the air is measured
C.that tells which direction a storm is coming from
D.used to measure the height of waves
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相关考题
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单项选择题
An air mass is termed warm if（）.
A.it is above 70°F
B.the ground over which it moves is cooler than the air
C.it originated in a high pressure area
D.it originated in a low pressure area -
单项选择题
All of the following are associated with cumulonimbus clouds EXCEPT（）.
A.steady rainfall
B.hail storms
C.thunderstorms
D.tornadoes or waterspouts -
单项选择题
After a cold front passes，the barometric pressure（）.
A.drops，and the temperature drops
B.drops，and the temperature rises
C.rises，and the temperature drops
D.rises，and the temperature rises
