GRE考试

【单选题】



网考网参考答案：B
网考网解析：
The perimeter of the shaded region is given as 4 + 2re. You can easily prove that the lengths of the curved parts of the region are 2π and that the straight edges have a total length of 4, but you should just assume these values. Then each side of the square is 2, and its area is 4. From that subtract π, the area of a circle (two semicircles) of radius 1. [*] Since π is slightly greater than 3, then 4 -π is less than 1. Column B is greater. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>