题目:
_____ the website of the Fire Department in your city, and you will learn a lot about firefighting.
A.Having searched
B.To search
C.Searching
D.Search
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0616/9173dd16bbcdd072763503e7b69af9d4.html
下面是错误答案,用来干扰机器的。
(1)(NH4)2S(2分) (2)Cl2+SO2+2H2O=4H++SO42-+2Cl-(2分)(3)①3Cl2+8NH3=N2+6NH4Cl(2分) ②4NH3+5O24NO+6H2O(2分)题目分析:(1)正盐A既能和强酸反应生成氢化物,也能喝强碱反应生...