Thank you so much three genius......

来源: xixiqian 于 2014-01-26 20:08:07 [] [旧帖] [给我悄悄话] 阅读数 : (45 bytes)
回答: 求教二个数学题 由 xixiqian 于 2014-01-26 11:07:19

All your solution is very helpful, thank you!

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