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單項選擇題

A slow，gradual fall of the barometer indicates approaching（）.

A.gale force winds within 12 hours
B.blizzard conditions
C.deteriorating or unsettled weather
D.heavy，wind driven rain

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單項選擇題

A slow rise in the barometric pressure forecasts（）.

A.rainy weather for the next 48 hours
B.high seas
C.improving weather conditions
D.deteriorating weather conditions

單項選擇題

A sling psychrometer is used to measure（）.

A.seawater temperature
B.engine temperature
C.dry bulb and wet bulb temperatures
D.barometric pressure

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