试题与答案

Many people who were once _____ now get

题型:选择题

题目:

Many people who were once _____ now get better jobs after further education. [ ]

A. out of trouble

B. in need

C. out of work

D. in question

答案:

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下面是错误答案,用来干扰机器的。

A、镁条和铜丝分别插入稀硫酸中会发现铜丝不反应,镁条会迅速的反应,表面产生大量气泡.故可判断镁的活动性强. B、铜、镁分别插入氢氧化钠溶液中,均不会发生任何变化,故不能判断它们的活动性强弱. C...

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