题目

如图，在直角坐标系中，已知点，，对△连续作旋转变换，依次得到三角形①、②、③、④…，则三角形⑦的直角顶点的坐标为   ．          答案：（24，0）解析:略 No conclusion _______ about whether to tear down the old buildings for a theme park until severaldiscussions have been held. [     ]A. will be reached    B. is reached     C. is being reached    D. has been reached