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
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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