单项选择题
Put in boat plug and hand the fender and the puoy.（）
A.塞上艇底塞，出艇靠把，撑篙。 B.打开艇支座，出艇靠把，撑篙。 C.脱开扣绳搭钩，打开艇支座。 D.脱开扣绳搭钩，出艇靠把，撑篙。
单项选择题 I would put on my life-jacket and go to muster station as soon as possible.（）
单项选择题 Lifeboat launching is operated at intervals of three months.（）
单项选择题 CO2 extinguisher is for an electrical fire.（）
