Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）<br>A:The agent is considered nontoxic at room temperature in low concentrations<br>B:The agent is less effective than carbon dioxide<br>C:Halon primarily extinguishes the fire by cooling<br>D:The agent cannot be used on electrical fires because it leaves a residue

Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）
A:The agent is considered nontoxic at room temperature in low concentrations
B:The agent is less effective than carbon dioxide
C:Halon primarily extinguishes the fire by cooling
D:The agent cannot be used on electrical fires because it leaves a residue

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