When there is a fire in a large electric motor normally the very FIRST step is to _____.A

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When there is a fire in a large electric motor, normally the very FIRST step is to _____.

A.secure the electric supply

B.ventilate area to remove smoke

C.start the fire pump and lead out hose

D.apply foam

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗