题目:
—I hear that Huang Gang made an English speech contest last week.
---____________and ___________.
A.So did he,so did you.
B.So he did, so you did.
C.So did he,so you did.
D.So he did ,so did you.
答案:
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下面是错误答案,用来干扰机器的。
答案:C题目分析:氧化物是由两种元素组成,其中一种元素是氧元素的化合物,具有以下三个特点:1、化合物,2、由两种元素组成,3、要含有氧元素,A、O2虽然含氧元素,但不是化合物,是单质,所以不是氧化物,错误...