GRE考试

【单选题】


网考网参考答案：A
网考网解析：
Since the area of each small circle is πr 2 , the area of the white region is 3πr 2 . Also, since the area of the large circle is πR 2 , the shaded area is πR 2 -3πr 2 = π(R 2 -3r 2 ). Since the areas of the white region and the shaded region are equal: 3πr 2 =π(R 2 -3r 2 )[*] 3r 2 =R 2 -3r 2 [*] [*] which is greater than 2. Column A is greater. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>