有人說中國人數學頭腦不行，這裏出個活案例。一個班30學生，甲排10名。現在又進20人，，，

來源: ipmi 於 2014-04-27 20:47:53 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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