单项选择题
舷梯口应放置一个救生圈。（）
A. A life craft should be located on the gangway. B. A life-buoy should be located at the gangway door. C.A life-raft should be located on the gangway. D.A life boat should be located on the gangway.
单项选择题 我们是船上的代理。（）
单项选择题 进行安全检查。（）
单项选择题 在船上应当日出时升起国旗。（）
