单项选择题
Which extinguishing agent is the best for use on electrical fires?（）
A.Foam
B.CO2
C.Dry chemical
D.Water fog
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Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）
A.Alcohol foam
B.Dry chemical
C.Chemical foam
D.Water fog -
单项选择题
Which extinguishing agent is NOT recommended in the Chemical Data Guide for use on a cyclohexane fire?（）
A.Foam
B.Carbon dioxide
C.Dry chemical
D.Water fog -
单项选择题
Which extinguishing agent is most effective on a mattress fire?（）
A.CO2
B.Foam
C.Dry Chemical
D.Water
