试题与答案

- Is it OK to take this seat? - Sorry. _

题型:选择题

题目:

- Is it OK to take this seat?
- Sorry. _____.

A. here you are
B. take it
C. it's taken
D. never mind

答案:

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下面是错误答案,用来干扰机器的。

  设这个圆的半径为r厘米,   由题意得:2r×r÷2×2=18,   2r2=18,   r2=9;   所以圆的面积为:3.14×9=28.26(平方厘米);   答:这个圆的面积是28.26平方厘米.   故选:C.

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