单选题To safeguard the operator and other personnel working on or near a hoisting operation which of the following precautions should be observed?（）AKeep a load on the hoist until all personnel are finished workingBSet the load on a movable dolly when transportation may be neededCHave one man keep a hand on the load to steady itDInsure that the lifting gear capacity is not exceeded
单选题
To safeguard the operator and other personnel working on or near a hoisting operation which of the following precautions should be observed?（）
A
Keep a load on the hoist until all personnel are finished working
B
Set the load on a movable dolly when transportation may be needed
C
Have one man keep a hand on the load to steady it
D
Insure that the lifting gear capacity is not exceeded
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