单项选择题
A.泡沫灭火剂 B.干粉灭火剂 C.水和蒸汽
A.0.2m B.0.5m C.0.6m
A.4%;0.2%;4%;0.5% B.0.4%;2%;0.4%;5% C.4%;0.5%;5%;0.4%