如图,以数轴的单位长度线段为边作一个正方形,以表示数1的点为

如图,以数轴的单位长度线段为边作一个正方形,以表示数1的点为圆心,正方形对角线长为半径画弧,交数轴于点A,则点A表示的数是 

A        B            C           D

答案

C

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