[单选题]Accidental flooding of the engine room bilges by the bilge main is prevented by( ).

正确答案 ：A

stop-check valves installed in the bilge suction manifolds

解析：解析：bilge main:舱底水总管;stop-check valves：截止止回阀

[单选题]对货船，除规定配备救生艇、筏外，每船应至少配备救助艇多少艘？

正确答案 ：A

一艘

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