2在一个单位圆的第一象限内有没有一点p(x>0,y>0),它到4点(1,0),(0,1),(-1,0),(0,-1)的距离都是有理数?
2在一个单位圆的第一象限内有没有一点p(x>0,y>0),它到4点(1,0),(0,1),(-1,0),(0,-1)的距离都是有理数?
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