單項(xiàng)選擇題

操作完后，關(guān)掉電動(dòng)機(jī)。（）

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.

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單項(xiàng)選擇題

為了避免震動(dòng)，用低速控制鈕減低移動(dòng)艙蓋的速度。（）

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.

單項(xiàng)選擇題

高速和野蠻操作艙蓋均是危險(xiǎn)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.

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操作完后，關(guān)掉電動(dòng)機(jī)。（）

你可能感興趣的試題

為了避免震動(dòng)，用低速控制鈕減低移動(dòng)艙蓋的速度。（）

高速和野蠻操作艙蓋均是危險(xiǎn)的。（）

操作完后，關(guān)掉電動(dòng)機(jī)。（）

為了避免震動(dòng)，用低速控制鈕減低移動(dòng)艙蓋的速度。（）