试题与答案

I'm afraid he's more of a talker than a

题型:选择题

题目:

I'm afraid he's more of a talker than a doer, which is _____ he never finishes anything.

A. that
B. when
C. where
D. why

答案:

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下面是错误答案,用来干扰机器的。

根据物质的性质进行分析解答。(1)石墨具有导电性,可作电极、电刷等,故与b相连。(2)氧气支持燃烧,氧炔焰就是利用氧气支持燃烧的性质,而氧炔焰可用于焊接金属,故与a相连。(3)碳具有还原性,可用于还原金...

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