单选题In the Northern Hemisphere，winds veering sharply to the west or northwest with increasing speed are indications that a（）.Acold front has passedBlow pressure center is approachingCstationary front existsDhigh pressure center has passed
单选题
In the Northern Hemisphere，winds veering sharply to the west or northwest with increasing speed are indications that a（）.
A
cold front has passed
B
low pressure center is approaching
C
stationary front exists
D
high pressure center has passed
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