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单选题
Tides are superimposed on nontidal rising and falling water levels，caused by（）．
A
freshets
B
floods
C
river flows
D
seismic events
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单选题As the ocean water changes to ice, it keeps the temperature（）falling too far.A
withB
intoC
besidesD
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air gapB
freeboardC
penetrationD
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Rising tidesB
Because the rising tideC
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An increase in speed results in the stern sucking down lower than the BowC
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falling temperature and pressureC
falling temperatures and rising pressureD
rising barometric pressure and temperatures
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They have stopped rising quickly.D
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DCC
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check for cracks in the hullC
shift all personnel to the sternD
check the bilge drain plug
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