Asked by Mr.evan from usa | Mar. 31, 2010 10:41
About:Shang Dynasty
what were some great achievements of the shang dynasty
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Answered by Mr.Leo | Mar. 31, 2010 21:16
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The Shang Dynasty has many great achievement in the fields like astronomy, mathsmatics and optics.3
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Answered by Mr.bleh. | Apr. 04, 2010 04:153
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what did they do to prove to have great achievement in optics?3
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Answered by Mr.Leo | Apr. 05, 2010 21:533
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They invented the convex lens.3
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Answered by Mr.bleh | Apr. 06, 2010 09:493
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thank you so much!3
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