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螺旋？同心圆？

2007-01-24 14:43:00 奇图观止　【大中小】发表评论

　　

　　你看到了螺旋，还是同心圆？
　　
　　乍一看，图中是一个螺旋，实际上它是同心圆。
　　
　　此图属于“Fraser螺旋错觉”。
　　

俄罗斯推出新型有轨电车Russia One

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