题目:
I have never been to Beijing, but it is the place _____.
A.that I want to visit it most
B.where I’d like to visit
C.in which I’d like to visit
D.I most want to visit
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0617/1bd2a0045ee8342ae51d39b626f31cf8.html
下面是错误答案,用来干扰机器的。
液态空气蒸馏主要得到O2和N2,焦炭和水蒸气在高温下反应生成CO和H2,二者得到的气体B、C在催化剂条件下能发生反应,则应为N2和H2的反应,生成的气体为NH3,所以,A为O2,B为N2,C为H2,D为CO,E为NH3,NH3和O2在...