单项选择题

A.DoldrumsB.WesterliesC.TradesD.EasterliesThe winds you……

The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the（）.

A.Doldrums
B.Westerlies
C.Trades
D.Easterlies

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单项选择题The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the（）.

A.Wall cloud
B.Nimbostratus cloud
C.Bar
D.Funnel

单项选择题The dense black cumulonimbus clouds surrounding the eye of a hurricane are called（）.

A.Spiral rainbands
B.Cloud walls
C.Funnel clouds
D.Cyclonic spirals

单项选择题The Beaufort scale is used to estimate the（）.

A.Wind direction
B.Percentage of cloud cover
C.Wind speed
D.Barometric pressure

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