试题详情
单项选择题作为一名值班水手，你必须懂得如何调整吊杆。（）

A、As an officer on duty, you must know how to adjust derricks.

B、As a sailor on duty, you must know how to adjust derricks.

C、As a sailor on duty, you must know how to operate cranes.

D、As an officer on duty, you must know how to operate cranes.

  • B

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