單項(xiàng)選擇題

Advection fog holds longest over which portions of the lakes? （）

A.Northwest
B.Southeast
C.Northeast
D.Southwest

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單項(xiàng)選擇題

According to Buys Ballot’s law，when an observer in the Northern Hemisphere experiences a northwest wind，the center of low pressure is located to the（）.

A.northeast
B.west-southwest
C.northwest
D.south-southeast

單項(xiàng)選擇題

A warm air mass is characterized by（）.

A.stability
B.instability
C.gusty winds
D.good visibility