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bu ke fen ge de ling tu
Pages: 85
Year: 2009
Issue:
7
Journal: School Journal of Mathematics
Abstract: 很久以前,有一个国王在临死时给他的五个儿子留下了一份遗嘱:"如果你们希望各自立围的话,可把我的国土分成五份,每人治理一个小国.但是,有一个条件,每个小国必须与其他四国有共同的国境,否则,不准分开!"
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