问题
单项选择题
Which fire extinguishing agent can NOT be used on an ethylenediamine?（）
A.Water foam
B.Dry chemical powder
C.Water fog
D.Alcohol foam
答案
参考答案：A
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Which fire extinguishing agent can NOT be used on an ethylenediamine?（）
A.Water foam
B.Dry chemical powder
C.Water fog
D.Alcohol foam
参考答案：A