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Before any machinery is put in operation，you should ______.
A.ventilate all compartments，see that the machinery is clean and there are no obstructions
B.just turn the key and start up
C.take for granted that there are no fuel leaks
D.assume there are no volatile fumes in the engine space
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更多 “ Before any machinery is put in operation，you should ______.A.ventilate all compartments，see that the machinery is clean and there are no obstructionsB.just turn the key and start upC.take for granted that there are no fuel leaksD.assume there are no volatile fumes in the engine space ” 相关考题
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单选题Before any machinery is put in operation，you should（）.A
ventilate all compartments，see that the machinery is clean and there are no obstructionsB
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assume there are no volatile fumes in the engine space
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单选题What should you do if you have transmitted a distress call a number of times on channel 16 and have received no reply?（）A
Repeat the message using any other channel on which you might attract attentionB
Key the microphone several times before transmitting againC
Turn up the volume on the receiver before transmitting againD
Report the problem to the head electrician
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