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判断题
Hand pump用于给救生船补气。
A
对
B
错
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单选题To inflate a davit launched liferaft you().A
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单选题After you have thrown the liferaft and stowage container into the water,you inflate the liferaft by().A
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单选题For pumping the bilges,a 54 foot long “T-Boat”,which is not a ferry,but is certificated to carry 30 passengers,must be fitted with at least().A
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单选题On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because()A
centrifugal pump is cheaper than reciprocating pumpB
the size of centrifugal pump with same capacity is smaller than that of reciprocating pumpC
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