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The sprinkler system of an enclosed lifeboat is used to ______.
A.cool the craft in a fire
B.cool the engine
C.spray oil on the sea to calm it
D.spray personnel during a fire
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单选题The sprinkler system of an enclosed lifeboat is used to（）.A
cool the craft in a fireB
cool the engineC
spray oil on the sea to calm itD
spray personnel during a fire
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