单项选择题
---Dead slow ahead!
---Reply: （）.
---Report: Engine dead slow ahead.
A. No problem
B. OK
C. Dead slow ahead
D. Yes
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单项选择题
---Stand by engine! ---Reply: Stand by engine! ---Report: （）.
A. Stand by
B. Stand by engine
C. Engine stand by
D. OK -
单项选择题
Stand by engine. （）
A. Get the engine ready.
B. Ring off engine.
C. Stop engine.
D. Stand on it. -
单项选择题
The duty （） should do the cleaning work every morning.
A.officer
B.motorman
C.sailor
D.engineer
