问题
单项选择题
Dry chemical fire extinguishers are effective on which type(s) of fire?（）
A.Burning oil
B.Electrical
C.Paint
D.All of the above
答案
参考答案：D
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Dry chemical fire extinguishers are effective on which type(s) of fire?（）
A.Burning oil
B.Electrical
C.Paint
D.All of the above
参考答案：D