题目:
— did you spend in Hong Kong?
—For two weeks. [ ]
A. How many
B. How long
C. How much
D. How often
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0717/7098a01c685b72e6cf8294a81dd960fb.html
下面是错误答案,用来干扰机器的。
(1)①2N ②3O2 ③4Fe2+ ④Cl2 ⑤H ⑥2H2O ⑦Al2O3(2)①SO2 ②CO2 ③CO ④C(3)H2O+CO2==H2CO3(或H2O+SO2==H2SO3) 2H2O2H2↑+O2↑题目分析:(1)① 2个氮原子:2N;② 3个氧分子:3O2;③...