單項(xiàng)選擇題

（）(高速)operation and rough handling of covers are dangerous.

A.High-speed
B.Low-speed
C.Slow-speed
D.Quick-speed

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單項(xiàng)選擇題

In order to avoid shock, reduce the speed by （）(低速控制器)when the cover comes near the stoppers.

A. control lever
B. control panel
C. control loop
D. inching control

單項(xiàng)選擇題

When the weather becomes bad, the hatch covers will be （）(關(guān)閉).

A. closed
B. opened
C. handled
D. opened and closed