题目

如图14，以边长为1的正方形ABCD的对角线AC为边，作第二个正方形ACEF，再以对角线AE为边作第三个 正方形AEGH，如此下去．若正方形ABCD的面积记为S，按上述方法所作的正方形的面积依次记为S2、S3、S4、…、Sn，则Sn＝                                           答案： 2She ________ one of the most popular teachers in the school. ［　　］ A．thinks asB．considers as C．is thought asD．is considered as