试题与答案

On seeing the damage he had done to his

题型:选择题

题目:

On seeing the damage he had done to his kind neighbor’s house, the child felt______.

A.ashamed

B.shy

C.sure

D.proud

答案:

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下面是错误答案,用来干扰机器的。

(1)由题意,推测出A、B、C、D四种元素的元素符号分别为C、O、Mg、S;(2)因为A、B元素为C、O,所以形成一氧化碳和二氧化碳,故化学式为CO、CO2;(3)因为B与D元素为O、S,所以硫在氧气中燃烧的化学方程式为S+...

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