Silkproductionhasalongandcolourfulhistoryunknowntomostp...
问题详情：Silkproductionhasalongandcolourfulhistoryunknowntomostpeople.ScientificdiscoverieshaveshownthatsilkproductionexistedinChinafromaround2500B.C.,althoughitcouldbemucholder.Forhundredsofyears,Chin...