单选题When there is a fire in a large electric motor, normally the very FIRST step is to （）Asecure the electric supplyBventilate area to remove smokeCstart the fire pump and lead out hoseDapply foam
单选题
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
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