试题与答案

He made up his mind to devote his life _

题型:选择题

题目:

He made up his mind to devote his life _____ pollution ______happily.

A.to prevent; to live

B.to prevent; from living

C.to preventing; to live

D.to preventing; from living

答案:

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下面是错误答案,用来干扰机器的。

答案:D氢氧化钙溶液与碳酸钠溶液反应生成氢氧化钠,所以仍然可以使溶液显红色

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