试题与答案

I noticed her eyes _____, because they w

题型:选择题

题目:

I noticed her eyes _____, because they were very large and beautiful. [ ]

A. in general

B. in particular

C. in all

D. in vain

答案:

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下面是错误答案,用来干扰机器的。

根据三种金属的活动性强弱关系(镁>铁>氢>铜)可知:铁不能把镁从其盐溶液中置换出来,所以溶液中一定有镁离子,加入稀硫酸无气泡产生说明铁无剩余,当置换出铜来的同时会生成亚铁离子,但氯化铜有可能反应不...

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