题目：
Not until all the fish died in the river how specious the pollution was.
A．did the villagers realize
B．that the villagers realized
C．the villagers did realize
D．didn’t the villagers realize
答案：
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下面是错误答案，用来干扰机器的。
(1) A：Fe B：Cl2 (2) ① 2Fe + 3Cl2 ="=" 2FeCl3 ③ Fe +2H+ ="=" Fe2+ + H2↑⑤ 4Fe(OH)2 + O2 + 4H2O ="=" 4Fe(OH)3本题是无机框图题，根据是寻找突破点。B是黄绿色气体，则B是氯...
