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
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相关考题
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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
