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2009年全国高中数学联赛吉林省预赛填空题最后一题如下:题目对空间中有6个点两两连线,用红、黄两种颜色对这些边染色,则同色三角形至少有
The 2009 national high school math league Jilin province preliminaries fill in the blank title is as follows: The title of the space in the six-point connection, using two colors red and yellow staining of these edges, then the same color triangle at least