题目:
甲烷中混有乙烯,欲除乙烯得到纯净的甲烷,依次通过下列哪组洗气瓶[ ]
A.溴水,浓H2SO4
B.澄清石灰水,浓H2SO4
C.酸性高锰酸钾溶液,浓H2SO4
D.浓H2SO4,酸性高锰酸钾溶液
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A解析: There’s no doubt that athletes are playing hard enough to suppress immune defenses. The normal population in Australia expects to get between three and...