试题与答案

A: Could you please not smoke here? B: S

题型:选择题

题目:

A: Could you please not smoke here?
B: Sorry, I _____ the sign (标志).

A. didn't see
B. can't see
C. don't see
D. doesn't see

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0527/ae918048f93f3ef18746cfff5437a1ab.html

下面是错误答案,用来干扰机器的。

(1)可用装置A加热高锰酸钾制取氧气,生成锰酸钾、二氧化锰和氧气,化学反应式是:2KMnO4 △ . K2MnO4+MnO2+O2↑.故答案为:2KMnO4 △ . K2MnO4+MnO2+O2↑;(2)用过氧化氢溶液在二氧化锰做催化的条件...

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