单项选择题
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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相关考题
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单项选择题
（）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 -
单项选择题
（）should generally be used when handing rough or sharp objects.
A.Heat-resistant
B.Rubber gloves
C.PVC gloves
D.Leather gloves -
单项选择题
Long hair should always be covered by（）when working with or near moving machinery.
A.a helment
B.safety cap
C.an ear plug
D.face mask
