单项选择题

As soon as the ship gets alongside the wharf, you should lower the gangway and put a （）below it.

A. safety net
B. safety belt
C. safety lamp
D. safety device

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单项选择题
Which of the following is not the duty of the sailor on gangway watch? （）

A. Noticing rise and fall of the tide.
B. Adjusting the mooring line.
C. Discharging cargoes.
D. Receive visitors
单项选择题
The duty sailor on the gangway usually looks （）the ship before relieving.

A.around
B.up at
C.at
D.in
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