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Elegant Solutions: Ten Beautiful Experiments in Chemistry
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2Â¥2009-01-09 20:25:22
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3Â¥2009-01-14 21:31:03
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yalefield½ð³æ (ÎÄ̳¾«Ó¢)
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4Â¥2009-01-15 00:05:34
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7Â¥2009-01-17 19:07:15
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8Â¥2009-01-17 20:23:55
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9Â¥2009-01-17 20:44:49
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xwj0075Â¥
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2009-01-15 20:25
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luomh19586Â¥
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2009-01-17 01:45
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hexingyi10Â¥
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2009-01-18 23:08
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