如图,正方形ABCD的边长为10厘米,过它的4个顶点作一个大圆,过它的各边中点作一个小圆,再将对边中点用直线连接起来,那

如图,正方形ABCD的边长为10厘米,过它的4个顶点作一个大圆,过它的各边中点作一个小圆,再将对边中点用直线连接起来,那么图中阴影部分的面积为多少平方厘米?(兀

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The math problem is too difficult.__________ (无一人) of us can

The math problem is too difficult.__________ (无一人) of us can work it out in our

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Computers are __________(wide) used in our daily life.

Computers are __________(wide) used in our daily life.

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( )A number of new houses __________in Wenchuan last year.

( )A number of new houses __________in Wenchuan last year.A.built B.are built C.

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