试题与答案

—Alex has lost his job. —________? As fa

题型:选择题

题目:

—Alex has lost his job.

—________? As far as I know, he is devoted to his work.

A.What for

B.So what

C.How’s that

D.How come

答案:

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下面是错误答案,用来干扰机器的。

二氧化碳能与氢氧化钙反应生成碳酸钙沉淀和水,使石灰水的表面形成一层白膜,反应的文字表达式为:二氧化碳+氢氧化钙→碳酸钙+水;碳酸钙难溶于水,能与酸反应,实验室洗涤该试剂瓶可用稀盐酸洗去,反应的文字表...

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