Before attempting to put out a class “C” fire involving an electric-driven centrifugal pump, you should FIRST （）.
- Ainsulate your shoes
- Bground the fire hose
- Csecure its power supply
- Dstart the fire pum
问题
Before attempting to put out a class “
参考解析：
分类：船舶电气与船舶安全题库
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