Once_____ oxygen ,the brain dies .A:deprived of B:depriving ofC:having deprived of D:deprived该怎么选呢 还有这里的once怎么理解呢

Once_____ oxygen ,the brain dies .A:deprived of B:depriving ofC:having deprived of D:deprived该怎么选呢 还有这里的once怎么理解呢 The two elements _____water is made are th oxygen and hydrogen.A thatB whichC of whichD with which oxygen是什么 oxygen pipe Liquid Oxygen I once_____(have)a dream of being a teacher. gas oxygen 怎么翻译 oxygen mask意思 basic oxygen furnace是什么意思 oxygen什么意思 oxygen什么意思 英文oxygen是什么意思 翻译oxygen masks oxygen怎么读 oxygen什么意思? oxygen怎么读 Trees produce oxygen,为什么不是Trees provide oxygen ()()()th()() ()()th()() ()()th()() ()()()th()() ()()()th()() ()()th()() 填写字母,成为单词.