预览加载中,请您耐心等待几秒...
1/10
2/10
3/10
4/10
5/10
6/10
7/10
8/10
9/10
10/10

亲,该文档总共39页,到这已经超出免费预览范围,如果喜欢就直接下载吧~

如果您无法下载资料,请参考说明:

1、部分资料下载需要金币,请确保您的账户上有足够的金币

2、已购买过的文档,再次下载不重复扣费

3、资料包下载后请先用软件解压,在使用对应软件打开

passage2passage2Beingamanhasalwaysbeendangerous.Thereareabout105malesbornforevery100females,butthisratiodropstonearbalanceattheageofmaturity,andamong70-year-oldstherearetwiceasmanywomenasmen.Butthegreatuniversalofmalemortalityisbeingchanged.Now,boybabiessurvivealmostaswellasgirlsdo.Thismeansthat,forthefirsttime,therewillbeanexcessofboysinthosecrucialyearswhentheyaresearchingforamate.Moreimportant,anotherchancefornaturalselectionhasbeenremoved.Fiftyyearsago,thechanceofababy(particularlyaboybaby)survivingdependedonitsweight.Akilogramtoolightortooheavymeantalmostcertaindeath.Todayitmakesalmostnodifference.Sincemuchofthevariationisduetogenes,onemoreagentofevolutionhasgone.2段Thereisanotherwaytocommitevolutionarysuicide:stayalive,buthavefewerchildren.Fewpeopleareasfertileasinthepast.Exceptinsomereligiouscommunities,veryfewwomenhas15children.Nowadaysthenumberofbirths,liketheageofdeath,hasbecomeaverage.Mostofushaveroughlythesamenumberofoffspring.专题讲解之标点符号利用逗号:两个逗号之间,或一个逗号之后为补充说明成份,非主干逗号:两个逗号之间,或一个逗号之后为补充说明成份,是非主干冒号:冒号前后,普通是从抽象到详细,冒号后面内容解释前面内容。冒号:冒号前后,普通是从抽象到详细,冒号后面内容解释前面内容。冒号:冒号前后,普通是从抽象到详细,冒号后面内容解释前面内容。分号:分号前后为并列关系。分号:分号前后为并列关系。分号:分号前后为并列关系。引号:1)引用2)反语或语意转移引号:1)引用2)反语或语义转移97-153.WhenLloydNicksondies,hewill________.[A]facehisdeathwithcalmcharacteristicofeuthanasia[B]experiencethesufferingofalungcancerpatient[C]haveanintensefearofterriblesuffering[D]undergoacoolingoffperiodofsevendays08-4Foronething,theSouthcouldnotaffordtopartwithitsslaves.Owningslaveswas“likehavingalargebankaccount,”saysWiencek,authorofAnImperfectGod:GeorgeWashington,HisSlaves,andtheCreationofAmerica.②ThesouthernstateswouldnothavesignedtheConstitutionwithoutprotectionsforthe“peculiarinstitution,”includingaclausethatcountedaslaveasthreefifthsofamanforpurposesofcongressionalrepresentation.08-4Foronething,theSouthcouldnotaffordtopartwithitsslaves.Owningslaveswas“likehavingalargebankaccount,”saysWiencek,authorofAnImperfectGod:GeorgeWashington,HisSlaves,andtheCreationofAmerica.②Thesouthernstateswouldnothavesign