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如图,在平面直角坐标系xOy中,已知直线AC的解析式为y=﹣x+1,直线AC交x轴于点C,交y轴于点A. (1)若等边△OBD的顶点D与点C重合,另一顶点B在第一象限内,直接写出点B的坐标; (...
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教案备课库《2015年河北省唐山市丰南区中考数学二模试卷》真题及答案
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