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單項選擇題

Of the following，（）is not a wind．

A.bora
B.gust
C.gregale
D.floe

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單項選擇題

Mechanical lifting of air by the upslope slant of the terrain is called（）.

A.vertical lifting
B.convective lifting
C.advective lifting
D.topographic lifting

單項選擇題

It is predicted that heavy rains are（）to flood the harbor and its vicinity in a few days.

A.frightening
B.threatening
C.scattering
D.warning

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