單項選擇題

An occluded front is caused by a(n)（）.

A.low pressure area
B.high pressure area
C.area of calm air
D.cold front overtaking a warm front

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單項選擇題

An instrument designed to maintain a continuous record of atmospheric pressure is a(n)（）.

A.mercurial barometer
B.aneroid barometer
C.barograph
D.thermograph

單項選擇題

An atoll cloud forming over an island due to heating of the land during the daytime would be which type? （）

A.Cirrus
B.Cumulus
C.Stratus
D.Nimbus