单项选择题

水手长，我们为什么要开舱盖?（）

A. Bosun, why do we open hatch covers?
B. Officer, why do we open hatch covers?
C. Bosun, why do we close hatch covers?
D. Bosun, why do we open hatches?

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单项选择题

操作完后，关掉电动机。（）

A. After operation, start the electric motor.
B. Before operation, stop the electric motor.
C. Before operation, start the electric motor.
D. After operation, stop the electric motor.

单项选择题

为了避免震动，用低速控制钮减低移动舱盖的速度。（）

A. To avoid shock, reduce the speed of moving hatch cover by inching control.
B. To avoid shock, reduce the speed of moving hatch cover by control levers.
C. To avoid shock, reduce the position of moving hatch cover by inching control.
D. To avoid shock, reduce the course of moving hatch cover by control levers.

单项选择题

高速和野蛮操作舱盖均是危险的。（）

A. High-speed operation and rough handling of hatches are dangerous.
B. Low-speed operation and rough handling of hatches are dangerous.
C. Low-speed operation and rough handling of hatch covers are dangerous.
D. High-speed operation and rough handling of hatch covers are dangerous.