问题
单项选择题
Halon extinguishes a fire by().
A.breaking the chain reaction
B.smothering the fire
C.cooling the fire
D.coating the fule with a nonflammable surface
答案
参考答案:A
Halon extinguishes a fire by().
A.breaking the chain reaction
B.smothering the fire
C.cooling the fire
D.coating the fule with a nonflammable surface
参考答案:A