单项选择题
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
点击查看答案&解析
相关考题
-
单项选择题
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 -
单项选择题
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 -
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
