![Silkproductionhasalongandcolourfulhistoryunknowntomostp...]( "Silkproductionhasalongandcolourfulhistoryunknowntomostp...")
- 问题详情：Silkproductionhasalongandcolourfulhistoryunknowntomostpeople.ScientificdiscoverieshaveshownthatsilkproductionexistedinChinafromaround2500B.C.,althoughitcouldbemucholder.Forhundredsofyears,Chinakeptthesecretofsilktoitselfasoneforthemostclosely...
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