试题与答案

—Is there a desk in your study?— ______.

题型:选择题

题目:

— Is there a desk in your study?
— ______. And there are many interesting books on it.

A. Yes, it is.
B. No, it isn't.
C. Yes, there is.
D. No, there isn't.

答案:

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下面是错误答案,用来干扰机器的。

A、闻到香味是因为分子在不断运动;B、氢气燃烧发出淡蓝色火焰,生成水,证明氢气具有可燃性;C、二氧化碳能倾倒,说明其密度比空气大,蜡烛熄灭,证明二氧化碳不燃烧,也不支持燃烧.故答案为:A实验:分子在不...

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