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單項選擇題

Early indications of the approach of a hurricane may be all of the following EXCEPT（）.

A.short confused swells
B.gradually increasing white clouds (mare's tails)
C.pumping barometer
D.continuous fine mist-like rain

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單項選擇題

Cirrus clouds are composed primarily of（）.

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

單項選擇題

An aneroid barometer reading should be corrected for differences in（）.

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

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