原帖由 ★棍辊☆ホひ 于 2007-1-19 21:58 发表) u: W& p; J& b" P5 s
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对吗?你八年纪考这题?????我看是你从奥数书里找到的吧~! 5 I. D7 [# I5 I. l$ t 6 g7 J1 d. j6 b: v SPS: my science is soooooo easy (for me cuz i studied )