單項選擇題()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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1.單項選擇題Isobars on a synoptic chart are useful in predicting().

A.temperature
B.dew point
C.wind velocity
D.relative humidity

2.單項選擇題When a wind blows round clockwise,it is().

A.Variable
B.Changing
C.Backing
D.Veering