单项选择题
A （）(救生圈) should be located on the gangway.
A.life-jacket B.life-raft C.life-buoy D.life-boat
单项选择题 The gangway is going to hit the （）(系缆桩) on the wharf.
单项选择题 Spread a safety net under the （） (舷梯).
单项选择题 As soon as the ship gets alongside the（）(码头),you should lower the gangway and put a safety net below it.
