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单选题
Waves formed by the wind blowing far away are known as（）.
A
sea
B
current
C
tide
D
swell
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barometerB
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IfB
WheneverC
BecauseD
Where
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go into place as the raft is inflatedB
be put up after everyone is aboardC
be put up only in severe weatherD
be used as a sail if the wind is blowing
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单选题In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.A
the wind speed is greater here since the wind is traveling in the same general direction as the storm's trackB
the direction of the wind and seas might carry a vessel into the path of the stormC
the seas are higher because of greater wind speedD
All of the above
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