问题
单项选择题
What is the most important characteristic of the extinguishing agent in fighting a class C fire?（）
A.Weight
B.Temperature
C.Electrical nonconductivity
D.Cost
答案
参考答案：C
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What is the most important characteristic of the extinguishing agent in fighting a class C fire?（）
A.Weight
B.Temperature
C.Electrical nonconductivity
D.Cost
参考答案：C