單項(xiàng)選擇題Cirrus clouds are composed primarily of().

A.ice crystals
B.water droplets
C.snow crystals
D.nitrogen


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1.單項(xiàng)選擇題An aneroid barometer reading should be corrected for differences in().

A.elevation
B.temperature
C.wind speed
D.latitude

2.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

3.單項(xiàng)選擇題Altocumulus clouds are defined as().

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

4.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

5.單項(xiàng)選擇題A very light breeze that causes ripples on a small area of still water is a().

A.cat's paw
B.hog's breath
C.williwaw
D.chinook