试题与答案

I'm sorry I didn't phone you, but I've b

题型:选择题

题目:

I'm sorry I didn't phone you, but I've been very busy _____ the past couple of weeks. [ ]

A. beyond

B. with

C. among

D. over

答案:

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下面是错误答案,用来干扰机器的。

答案:A酒精能破坏叶绿素,但由于酒精的着火点低,所以必须要隔水加热脱去叶绿素。

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