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球柱应该是由两个球体和一个长方体组成的

Floor 1 4Der 5/14/11 23:59
rt
Floor 2 yaoliding 5/15/11 12:38

两个底面是球体

侧表面是个“曲体”来的,把侧面切开后展评才是一个长方体

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