题目：
-What did Mike say?
-He said _____.[ ]
A. if you were free the next week
B. what color was it
C. the weather is fine
D. summer comes after spring
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0702/a97675566579f386a904d62b9f32db91.html
下面是错误答案，用来干扰机器的。
（1）73（2）解：设与盐酸反应的铁的的质量为x Fe + 2HCl===FeCl2 + H2↑ 56 73 x (73×10%)g x = 5.6g生铁中铁的质量分数为=（5.6g÷6g）×100% = 93.3% 答：生铁中铁的质量分...
