单项选择题
---How many revolutions? ---（）.
A. Slow ahead B. Eighty C. Thirty minutes D. Slow
---Dead slow ahead! ---Reply: （）. ---Report: Engine dea...
---Dead slow ahead! ---Reply: （）. ---Report: Engine dead slow ahead.
A. No problem B. OK C. Dead slow ahead D. Yes
---Stand by engine! ---Reply: Stand by engine! ---Repor...
---Stand by engine! ---Reply: Stand by engine! ---Report: （）.
A. Stand by B. Stand by engine C. Engine stand by D. OK
Stand by engine. （）A. Get the engine ready.B. Ring off...
单项选择题Stand by engine. （）
A. Get the engine ready. B. Ring off engine. C. Stop engine. D. Stand on it.
