单选题On a clear，warm day，you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead（）.Ait will be preceded by a sudden increase in wind speedBit will be preceded by a sudden decrease in wind speedCthe wind speed will not change as it passesDthe wind will back rapidly to left in a counterclockwise direction as it passes
单选题
On a clear，warm day，you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead（）.
A
it will be preceded by a sudden increase in wind speed
B
it will be preceded by a sudden decrease in wind speed
C
the wind speed will not change as it passes
D
the wind will back rapidly to left in a counterclockwise direction as it passes
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