A.high relative humidity
B.frequent showers and thunderstorms
C.steep pressure gradients
D.frequent calms
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A.in the southeast quadrant of the storm
B.directly behind the storm center
C.forward and to the right of its course
D.behind and to the left of its course
A.the position is suitable
B.the position is reliable
C.the position is changeable
D.the position is fixable
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Bales close to the deckhead should be covered to prevent（）.
In the Northern hemisphere northerly winds may cause temperature（）.
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
The circulation around a low pressure center in the Northern Hemisphere is（）.
The company should establish and maintain procedures to control all documents and date which are relevant to（）.