A.氧; B.可燃?xì)猓?br /> C.氧和可燃?xì)猓?br /> D.氮
A.氧含量≥18.5%; B.可燃?xì)夂浚?.5%; C.可燃?xì)夂浚?.2%,氧含量≥18.5%; D.可燃?xì)夂浚?.2%
A.18.5% B.0.5% C.0.2% D.0%