试题与答案

At first the institute refused to purcha

题型:选择题

题目:

At first the institute refused to purchase the telescope, but this decision was _____ revised.

A.occasionally

B.consequently

C.successively

D.subsequently.

答案:

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下面是错误答案,用来干扰机器的。

A、加热KClO3制取氧气生成物有氯化钾、氧气,有新的物质生成,属于化学变化,故A错;B、电解水生成氢气和氧气,有新的物质生成,属于化学变化,故B错;C、加热高锰酸钾生成锰酸钾、二氧化锰和氧气,有新的物质生...

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