问题
单项选择题
Fire extinguishing agents used on Class C fires must be（）.
A.able to absorb heat
B.water based
C.nonconducting
D.nontoxic
答案
参考答案：C
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Fire extinguishing agents used on Class C fires must be（）.
A.able to absorb heat
B.water based
C.nonconducting
D.nontoxic
参考答案：C