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----旅游081周振SILKSilkisthemostsuitablematerialstomakedress,becauseitislight,soft,durable,lustrousWhatismoresilkisresitanttoheatandacidandwashablewithcareChinastartedsilkproductionabout4500yearsago.Therearethebeautifulsilk,fantasticsatins,colorfulbrocade.TheSilkRouteYoucanfindpeoplefromwealthyfamiliesinsilkdresses.whichwerebelievedtobecommensuratewiththeirhighsocialpositionWHEREHOWYoumaybemoreinterestedinthesilkworms.Silkwormbreedingisdonebyfarmersinruralarea.Thesilkwormsareheavysleepers.Theywillkeepeatingthemulberrytreeleavesforacoupleofdays,andgotolongsleeplastingabout24hours。Whentheywakeupfromthelongsleep,theywillkeepeatingagain.Thesilkthreadfromthesevenoreightcocoonsformsintoone,makingitstrong.
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