题目

如图，大圆的半径是 ，小圆的半径是大圆半径的 ，求阴影部分的面积. 答案：解： S圆环=πR2−(23R)2π=π(R2−49R2)=59πR2 .Wanda Plaza in Wuxi is _____ a shopping center．You can do almost anything there．A．no more thanB．not more thanC．more thanD．rather than