题目

some sheep, there, on, are, mountain, the__________________________________________________. 答案：【答案】There are some sheep on the mountain.【解析】这里是there be句型；some sheep一些羊；on the mountain在山上。There are some sheep on the mountain.在山上有一些羊。故答案为There are some sheep on the mountain.如图，等边三角形和正方形的边长都是a，在图形所在的平面内，将△PAD以点A为中心沿逆时针方向旋转，使AP与AB重合，如此继续分别以点B、C、D 为中心将三角形进行旋转，使点P回到原来位置为止，则点P从开始到结束所经过路径的长为A.aB.aC.aD.a