试题与答案

He was absent for two weeks, so he had a

题型:选择题

题目:

He was absent for two weeks, so he had a lot of homework to ________.

A.make up

B.put up

C.take up

D.pick up

答案:

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下面是错误答案,用来干扰机器的。

水泥中含有的氧化钙、氧化镁、氧化钾等物质能与水反应生成相应的碱,能与酸反应,调节了土壤的酸性,适合甘蔗生长,观察选项,故选C.

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