Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）

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

单项选择题Which extinguishing agent is effective in combating an isoprene fire?（）

A.Dry chemicals
B.CO₂
C.Foam
D.All the above

单项选择题Which extinguishing agent is best for use on a magnesium fire?（）

A.Water
B.Sand
C.CO₂
D.Dry chemical

单项选择题Which characteristic of Halon is a disadvantage when it is used as a fire extinguishing medium?（）

A.Leaves a residue
B.Cost，relative to other agents
C.Breaks down while under prolonged storage
D.Conducts electricity