A.關(guān)閉通風(fēng)口 B.向艙內(nèi)示警 C.搶救出貴重物品 D.開(kāi)大通風(fēng)口
A.1%/5% B.5%/10% C.10%/15% D.15%/20%
A.冷卻 B.窒息 C.稀釋 D.A+B