單項(xiàng)選擇題

Cirrus clouds followed by cirrostratus then altostratus，stratus，and occasionally nimbostratus indicate the approach of a(n)（）.

A.cold front
B.warm front
C.tropical front
D.occluded front

你可能感興趣的試題

單項(xiàng)選擇題

Brief，violent showers frequently accompanied by thunder and lightning are usually associated with（）.

A.passage of a warm front
B.passage of a cold front
C.winds shifting counterclockwise in the Northern Hemisphere
D.stationary high pressure systems

單項(xiàng)選擇題

As a cold front passes an observer，pressure（）.

A.drops and winds become variable
B.rises and winds become gusty
C.drops and winds become gusty
D.rises and winds become variable

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