步星曦's submissions for 1175 等比数列

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步星曦
on May 5, 2012, 11:39 p.m.
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164.00 KB
步星曦
on May 5, 2012, 11:33 p.m.
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212.00 KB
步星曦
on May 5, 2012, 11:32 p.m.
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164.00 KB