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Re:三角形有5心,内心,外心,重心,垂心,旁心(外角平分线,据说有些性质但没接触过)In Reply To:三角形有5心,内心,外心,重心,垂心,旁心(外角平分线,据说有些性质但没接触过) Posted by:sunmoonstar_love at 2005-07-20 19:26:36 Followed by:
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