In practice we do this in elementary school, and change from mid

来源: trivial 于 2014-08-22 08:57:44 [档案] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

回答: Similar to : if you give everybody an A, who is the best student 由 SwiperTheFox 于 2014-08-22 08:51:42

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• change from middle school. -trivial- ♀ (0 bytes) () 08/22/2014 postreply 08:58:55