单项选择题
A.cold front becoming stationary B.warm front becoming stationary C.cold front overtaking a warm front D.warm front dissipating
An occluded front is caused by a(n)（）.A.low pressure ar...
单项选择题An occluded front is caused by a(n)（）.
A.low pressure area B.high pressure area C.area of calm air D.cold front overtaking a warm front
An instrument designed to maintain a continuous record ...
单项选择题An instrument designed to maintain a continuous record of atmospheric pressure is a(n)（）.
A.mercurial barometer B.aneroid barometer C.barograph D.thermograph
An atoll cloud forming over an island due to heating of...
单项选择题An atoll cloud forming over an island due to heating of the land during the daytime would be which type? （）
A.Cirrus B.Cumulus C.Stratus D.Nimbus
