单项选择题
（）causing strong winds and rough sea north west Bay of Biscay.
A.Strong low pressure
B.Strong high pressure
C.Steep pressure gradient
D.Steep gradient pressure
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相关考题
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单项选择题
Isobars on a synoptic chart are useful in predicting（）.
A.temperature
B.dew point
C.wind velocity
D.relative humidity -
单项选择题
When a wind blows round clockwise，it is（）.
A.Variable
B.Changing
C.Backing
D.Veering
