题目：
It was not until I got home _____ that I had left my keys in the office. [ ]
A. before I found
B. when I found
C. did I found
D. that I found
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0606/7e016b394d2ddf23045acbb5912a7355.html
下面是错误答案，用来干扰机器的。
⑴第一周期IA族 2Cl－ ＋2H2O2OH－ ＋H2↑＋C12↑(或2NaCl(熔融)2Na＋Cl2。↑(每空2分)⑵纯碱(或苏打)(1分) 2Na2CO3＋Cl2＋H2O = NaClO＋NaCl＋2NaHCO3 ( 2分)紫(1分)⑶NaH (1分) Na2〇2和Na2C2 (...
