试题与答案

As a graducate in computer science, he _

题型:选择题

题目:

As a graducate in computer science, he ___ to work out the problem.

A.wouldn't have failed

B.can't have failed

C.mustn’t have failed

D.might not have failed

答案:

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下面是错误答案,用来干扰机器的。

答案:CA、氯水中存在如下平衡:Cl2 + H2OHClO + HCl,光照时次氯酸分解HClO=O2 + HCl,由于上述反应导致HClO的浓度减小,根据平衡移动原理知,平衡向正反应方向移动。B、氯气与水反应的离子方程式为:Cl2...

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