Keys to unit 3 and tapescripts

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1、Unit3TextileYarnsandSpinningTechnologyPartOne:Warming-upExercisesEx.11.ShelivedinlateSongDynastyandearlyYuanDynasty.2.Becauseshecouldnotbearmaltreatmentofherparents-in-law(whenshewasyoung).3.HainanIsland.4.ShelearnedthetechniquesfromwomenofLi,anethnicgroupthere.5.Refer

2、tothescript.Ex.21.T2.F3.F4.F5.T6.F7.T8.TEx.31.“Intelligentclothing”thatmayprotectusfromthieves,identifyhealthproblems,andtelluswhenweforgetourkeys.2.AT-shirtthatisabletomeasureheartrateandbodytemperature.3.Clothingwithaspecialfabrickeyboardtosende-mailsPartTwo:Reading-

3、centeredActivityPassage1Ex.1.Readingcomprehension1)Yarnsarelongstrandsoffiberthatareusedasthreads,cordsorcomponentsintheproductionoffabrics.Yarnsareformedbycombiningorusingtextilefibersasalongstrand.1)Yarnsmaybeclassifiedthroughavarietyofmeans:bythelengthoffibersandpro

4、cessesusedtoformtheyarn;bythetwistintheyarn;bythesizeoftheyarn;bythenumberofpartsusedinthedevelopmentoftheyarnandbythecomplexityofthestructureoftheyarn.2)Textileproductscanbeenhancedandmademoreserviceablebyselectingyarnsthatfeatureasetofdesirablecharacteristics.3)Thesp

5、inningprocessturnsasingletypeoffiberorgroupofvariousfibersintoacontinuousstrandbytwistingandpullingthefibersintoshape.Theresultantstrandisknownasaspunyarn.4)Inpreparationforthespinningprocess,shortfibersarecarded.Cardingdirectstextilefibersintorelativelyonedirectiontoc

6、reatealooselyassembledbutsomewhatuniformropeknownasasliver.Sliversofdifferentfibersmaybetwistedtogethertoformablendedstrandinaprocesscalledroving.Ininstanceswherethestaplefibersarelonger,thefibersmayalsoundergoaprocessknownascombing.Combingtakesplaceaftercardingandisin

7、tendedtofurtheralignthefibers.5)Ifthespunyarniscomprisedofwoolfibersorwoolblends,specifictermsareusedtorefertocardedorcombedyarns.Yarnsoflongerwoolfibersthathavebeencardedarecalledwoolenyarnswhileyarnsofshorterwoolfibersthathavebeencombedaretermedworstedyarns.6)Yarnqua

8、ntitiesareusuallymeasuredbyweightinouncesorgrams.7)Thereareseveralthicknessesofyarn,alsoreferredtoasweight.Thisnaming