题目

The doctor will see you again nextweek. (同时), you must rest as much as possible. 答案:【1】Meanwhile已知在直角坐标系中有A、B、C、D四个点,其中A,B,C三个点的坐标分别为(0,2),(﹣1,0),(2,0),则当点D的坐标为___________时,以A、B、C、D四个点为顶点的四边形是平行四边形.
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