方才在精練上看到一道數學題，出法極是詭異，私心想著若是這題讓你來做，定可增加公式熟練度，對你的數學必是極好的

來源: 小寧波♂ 於 2012-05-31 03:41:29 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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