单项选择题
The sailor should （）(报告)it to the duty officer.
A.report
B.ask
C.tell
D.speak
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A. guide rope
B. guide rail
C. side coaming
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单项选择题
After operation, drop the control levers into stowing hole, and （）(停止)the electric motor.
A.start
B.stop
C.move
D.shift -
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（）(高速)operation and rough handling of covers are dangerous.
A.High-speed
B.Low-speed
C.Slow-speed
D.Quick-speed
