题目

If the radius(半径) of circle  Ⅲ in the figure3(图3) is  of the radius of circle Ⅱ,and the radius of circle Ⅱ is  of the radius of circle Ⅰ,then the area of the shaded region iswhat part of the area of circle Ⅰ?(    ) (A);  (B);(C);(D)   答案：,A

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