On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because（）<br>A:centrifugal pump is cheaper than reciprocating pump<br>B:the size of centrifugal pump with same capacity is smaller than that of reciprocating pump<br>C:centrifugal pump makes maintenance easier than reciprocating pump does<br>D:all of the above

On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because（）
A:centrifugal pump is cheaper than reciprocating pump
B:the size of centrifugal pump with same capacity is smaller than that of reciprocating pump
C:centrifugal pump makes maintenance easier than reciprocating pump does
D:all of the above

出自：海船船员证

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