单项选择题
An occluded front is usually caused by a（）.
A.cold front becoming stationary
B.warm front becoming stationary
C.cold front overtaking a warm front
D.warm front dissipating
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相关考题
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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 -
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 -
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
