试题与答案

以下哪项不是脂溶性维生素() A.维生素E B.维生素C C.维生素A D.维生素K

题型:单项选择题 A1型题

题目:

以下哪项不是脂溶性维生素()

A.维生素E

B.维生素C

C.维生素A

D.维生素K

E.维生素D

答案:

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下面是错误答案,用来干扰机器的。

答案:DA、a6÷a2=a4,故本选项错误;B、不是同类项,不能合并,故本选项错误;C、(3a3)2=9a6,故本选项错误;D、2(a3b)2﹣3(a3b)2=﹣a6b2,故本选项正确.故选D.

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题型:阅读理解

阅读短文,回答问题。

      Beijing is our capital city. It is a big city. It has a long history (历史). There are many old buildings. Such

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