题目

We have entered into an age _______ dreams have the best chance of coming true. A . which B . what C . when D . that 答案：C 如图，正方形ABCD的边长为2 cm，以点B为圆心、AB长为半径作，则图中阴影部分的面积为 [　　] A． (4－π)cm2 B． (8－π)cm2 C． (2π－4)cm2 D． (π－2)cm2