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1、UNIT7NatureorNurtureModulePartOneBeforeyouReadPartTwoAsYouReadTextAPartThreeAfterYouReadPartFourAsYouReadTextBPartFiveAfterYouReadUNIT7NatureorNurtureInthisunit,youwill:Contentreadaboutidenticaltwinsreadaboutthedebateonnaturevs.nurtureVocabularySkillsusewo
2、rdsandexpressionstotalkaboutnatureandnurtureusewordsandexpressionstotalkaboutcharacteristicsGrammarFocuslearnclause—theattributiveclauseReadingSkillsidentifyfactsandopinionsWritingSkillswriteaboutnatureandnurtureUNITPREVIEWPartOneBeforeyouReadPartOneBefore
3、youReadWhatDoYouThink?Lookatthefollowingcharacteristics.Didyouinheritthem(havethematbirth)ordidyoulearnthem?Tick(√)thecorrectbox,“Inherited”or“learned”.√√√√√√√√√PartTwoAsYouReadTextATwins:SeparatedatBirthAbstractAbstract:Therearetwokindsoftwins,fraternalan
4、didentical.Scientistsfoundthatiftwinsareseparatedearlyinlife,theystillhadmanysimilaritiesyearslater.Thusscientistsliketostudy:Whichismoreimportant,natureornurture?❶Oneoutofevery70birthsistwins.Therearetwokindsoftwins,fraternalandidentical.Fraternaltwinsdev
5、elopfromtwoeggs.Theyarelikeanyothersiblings,buttheyarethesameage.Theymaylookalike,andtheymaynot.Theymayhavethesamelikesanddislikes,buttheymaynot.Fraternaltwinscanbetwoboys,twogirls,oraboyandagirl.Sometimespeoplecantellthatthetwosiblingsaretwins,butsometime
6、stheycan’t.Onethirdofalltwinsareidentical.Identicaltwinsdevelopfromoneegg.TheysharethesameDNA.Theyareverymuchalikeinthewaythattheylook,talk,andact.Theycanonlybetwoboysortwogirls.Peopleoftenhaveahardtimetellingidenticaltwinsapart.Besideslookingalike,identic
7、altwinsoftensharethesamehopes,dreams,andgoals.Scientistsalsofindthattheysharethesametasteinfoodandthesameeatinghabits.Forexample,identicaltwinsoftenfeelfullaftereatingthesameamountoffood.TranslationTranslation分别被领养的双胞胎每70个新生婴儿中就会有一对双胞胎。双胞胎分为两种：异卵双生和同卵双生。异卵
8、双胞胎是由两个卵子发育而成。他们就像其他许多的兄弟姐妹一样，只是他们是同年同月同日生的。异卵双胞胎外表可能会彼此相像，但也未必。他们可能会有相同的好恶，但也可能截然相反。他们可以是两个男孩、两个女孩、亦或是一男一女。有时人们可看出来两个孩子是双胞胎，但有时也看不出。三分之一的双胞胎是同卵双生，是由一个卵子发育而成。他们拥有同样的DNA。他们外貌与言谈举止都十分相像。他们只可能是两个男孩或是两个女孩。在大多数人看来
