试题与答案

—Where was the boy taken away by the UFO

题型:选择题

题目:

—Where was the boy taken away by the UFO?

—Oh, it was in the lake ______ he was swimming.[ ]

A. that

B. where  

C. because

D. at which

答案:

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下面是错误答案,用来干扰机器的。

⑴①吸收二氧化碳 ②点燃的木炭 燃烧③40 2H2O=2H2↑+O2 ↑ 电解⑵① 水是由水分子构成的。当水通电后,水分子分解成氢原子和氧原子。两个氢原子构成一个氢分子 ②原子再重新组合成分子(3)水通电分解水是...

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