This colorless gas is called oxygen,___ ___ fires burn much better
问题描述：
This colorless gas is called oxygen,___ ___ fires burn much better
which ,可以填with which吗
答
This colorless gas is called oxygen, ___in which ___ fires burn much better答案是in which ,可以填with which吗不可以；无色气体是氧气,火焰在氧气中烧的更好；突出的是在氧气中,而不是有了氧气,燃烧本来就离不...