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單項(xiàng)選擇題

Personnel working aloft (above 2metres) should wear（）or other arresting device at all times.

A.a safety harness with lifeline
B.a safety net
C.a life buoy
D.buoyancy agarments

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單項(xiàng)選擇題

（）should generally best for handing acids,alkalis,various types of oils,solvents and chemicals in general.

A.Heat-resistant gloves
B.Rubber gloves
C.PVC gloves
D.Leather gloves

單項(xiàng)選擇題

（）should generally be used when handing rough or sharp objects.

A.Heat-resistant
B.Rubber gloves
C.PVC gloves
D.Leather gloves

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