单项选择题
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
An air mass is termed warm if（）.A.it is above 70°FB.the...
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
All of the following are associated with cumulonimbus c...
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
After a cold front passes，the barometric pressure（）.A.d...
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
