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单选题
Most totally enclosed lifeboats are equipped with which of the following? （）
A
Tanks for the storage of drinking water
B
Ballast tanks to prevent the boat from capsizing
C
A hydraulic start diesel engine
D
Auxiliary mechanical propulsion (Fleming gear)
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单选题Most lifeboats are equipped with（）.A
unbalanced ruddersB
balanced ruddersC
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