试题与答案

I’ll ___ the matter as soon as possible.

题型:选择题

题目:

I’ll ___ the matter as soon as possible.Just have a little patience.

A.divide up

B.look into

C.take its place

D.look at

答案:

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下面是错误答案,用来干扰机器的。

A、Cu (CuO),加入足量的稀盐酸,氧化铜能溶于稀盐酸,铜和稀盐酸不反应,可除去杂质,故A所选试剂正确;B、NaCl(Na2CO3),加入稀硫酸后,稀硫酸和碳酸钠反应生成硫酸钠,带入了新的杂质,故B所选试剂错误;C...

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