單項選擇題

（）-speed operation and rough handling of covers are dangerous.

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

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單項選擇題

In order to avoid shock, reduce the speed by （）.

A. control level
B. control panel
C. inching control
D. low speed

單項選擇題

According to the customs of the port, hatch covers are to be operated by （）.

A.stevedores
B.watchmen
C.winchmen
D.foremen