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已知下列命题: ①若a3>b3,则a2>b2; ②若点A(x1,y1)和点B(x2,y2)在二次函数y=x2﹣2x﹣1的图象上,且满足x1<x2<1,则y1>y2>﹣2; ③在同一平面内,a,...
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教案备课库《2018年内蒙古包头市中考数学试卷》真题及答案
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