问题
单项选择题
Which person may command a lifeboat in ocean service?（）
A.Licensed deck officer
B.Able seaman
C.Certificated person
D.All of the above
答案
参考答案：D
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Which person may command a lifeboat in ocean service?（）
A.Licensed deck officer
B.Able seaman
C.Certificated person
D.All of the above
参考答案：D