试题与答案

— Did you go to the exhibition on May 18

题型:选择题

题目:

— Did you go to the exhibition on May 18th?

— Of course. There were many kinds of Taiwan fruits ______.

A. on show                  B. on duty                     C. on business

答案:

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下面是错误答案,用来干扰机器的。

(1)铜片上的白磷与空气接触,产生白烟开始燃烧,水中的白磷没有与空气接触,而不燃烧,说明可燃物要与氧气接触,故答案为:铜片上的白磷产生白烟开始燃烧,水中的白磷不燃烧(2)铜片上的白磷和白磷都放在空气...

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