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The author has
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圆可以展成直线,球体为什么就不能展成平面?
Floor 1
魔法绿骑士
6/17/11 18:41
rt
Floor 3
魔法绿骑士
6/17/11 19:33
回复:2楼
那应该怎样展才行?
网上说球面不可展。
Floor 5
魔法绿骑士
6/28/11 22:20
回复:4楼
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