A.Wind directionB.Percentage of cloud coverC.Wind speed……

单项选择题The area of strong westerly winds occurring between 40°S and 60°S latitude is called the（）.

A.polar easterlies
B.prevailing westerlies
C.roaring forties
D.jet streams

单项选择题The AMVER system requires（）.

A.Sailing plans to be sent before departure
B.More frequent reports in heavy weather
C.Arrival reports to be sent within 8 hours of arrival
D.A position report within 24 hours of departure

单项选择题Of the following，（）is not a wind.

A.Bora
B.Gust
C.Gregale
D.Floe

单项选择题If the center of low pressure is due west of you in the Northern Hemisphere，which wind direction should you expect（）.

A.South to west
B.South to east
C.West to north
D.North to east

单项选择题After a cold front passes，the barometric pressure（）.

A.Drops，and the temperature drops
B.Drops，and the temperature rises
C.Rises，and the temperature drops
D.Rises，and the temperature rises