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 3067| 10
 | 一道几何题,看看。 | 
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| 19events = 644days PB (2 3 4 5)B = 1200seconds 北大魔方爱好者QQ群74893945 mf8最少步讨论群:RP与公式的绝佳配合QQ群5652935 | ||
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 | 回复 8# 的帖子
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