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單項(xiàng)選擇題

An anemometer on a moving vessel measures（）.

A.apparent wind speed only
B.true wind speed and true wind direction
C.true wind speed only
D.apparent wind speed and true wind direction

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單項(xiàng)選擇題

Altocumulus clouds are defined as（）.

A.high clouds
B.middle clouds
C.low clouds
D.vertical development clouds

單項(xiàng)選擇題

Above-normal tides near the center of a hurricane maybe caused by the（）.

A.high barometric pressure
B.jet stream
C.storm surge
D.torrential rains

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