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However where immediate action is necessary to ensure safety of the ship its machinery a..

2020-09-18 20:33:01 资格考试 阅读

问题详情

A.safety

B.the ship, its machinery and crew

C.immediate action

D.the engineer in charge

请帮忙给出正确答案和分析，谢谢！

参考答案

考点：