zscas36222's submissions for 1175 等比数列

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zscas36222
on Dec. 11, 2007, 10:31 a.m.
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zscas36222
on Dec. 11, 2007, 9:12 a.m.
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zscas36222
on Dec. 11, 2007, 9:11 a.m.
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152.00 KB