问题
单项选择题
0il fires are best extinguish by().
A.cutting off supply of oxygen
B.removing the fuel
C.cooling below the ignition temperature
D.spraying with water
答案
参考答案:A
0il fires are best extinguish by().
A.cutting off supply of oxygen
B.removing the fuel
C.cooling below the ignition temperature
D.spraying with water
参考答案:A