丝绸英文介绍ppt模版课件.ppt

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1、----旅游081周振SILKSilkisthemostsuitablematerialstomakedress,becauseitislight,soft,durable,lustrousWhatismoresilkisresitanttoheatandacidandwashablewithcareChinastartedsilkproductionabout4500yearsago.Therearethebeautifulsilk,fantasticsatins,colorfulbrocade.TheSilkRouteYoucanf

2、indpeoplefromwealthyfamiliesinsilkdresses.whichwerebelievedtobecommensuratewiththeirhighsocialpositionWHEREHOWYoumaybemoreinterestedinthesilkworms.Silkwormbreedingisdonebyfarmersinruralarea.Thesilkwormsareheavysleepers.Theywillkeepeatingthemulberrytreeleavesforacoupleofd

3、ays,andgotolongsleeplastingabout24hours。Whentheywakeupfromthelongsleep,theywillkeepeatingagain.Thesilkthreadfromthesevenoreightcocoonsformsintoone,makingitstrong.ThankYou