2016年6月英语四级考试：仔细阅读练习(5)思维导图
The future population will be older than today, and this in turn will change the patterns of social demands. However, Mexico will still be far from the "aging societies" that will
树图思维导图提供 2016年6月英语四级考试：仔细阅读练习(5) 在线思维导图免费制作，点击“编辑”按钮，可对 2016年6月英语四级考试：仔细阅读练习(5) 进行在线思维导图编辑，本思维导图属于思维导图模板主题，文件编号是：300b736ebd84f897f83eea7aceec931c
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2016年6月英语四级考试：仔细阅读练习(5)思维导图模板大纲
Thefuturepopulationwillbeolderthantoday,andthisinturnwillchangethepatternsofsocialdemands.However,Mexicowillstillbefarfromthe"agingsocieties"thatwillmostlikelyprevail(占优势)intheindustrializedcountries.Inlessthan25years,thecountrywillhavetoaddalmostasmuchinfrastructureasithasalreadybuiltuptonow,simplytomaintainservicesandproductionatthecurrentlevels.Thiswillbeatremendouschallenge,althoughasimilaronewasfacedsuccessfullyintherecentpast,whenavailableinfrastructurewasdoubledintwodecadesorso.ItisnowonderthatmuchhasbeensaidabouttheneedtoreduceorpreferablyhaltMexico'spopulationcontrolwhichistakenforgrantedasbothgoodandnecessary.Ithasalsogainedsupportersinthedevelopingworld,andMexicoisnoexception.Buttheargumentsaboutpopulationarecomplicated,asthefollowingdiscussionillustrates.
EvenifMexico'spopulationreaches125millionbytheyear2010,itspopulationdensityisstillsmallerthanthe1985populationdensityofsome50countries.ByinternationalstandardsMexicowillstillnotbeoverpopulatedbytheyear2010.Ifwealthisgeneratedbypeople,themoreindividualsthereare,thegreaterthewealththatpotentiallycouldbegenerated.WhyshouldMexicocontrolitspopulationatdensitylevelsbelowthoseoftherichercountriesifmorepopulationrepresentsthepossibilityofgeneratingmorewealth?
Ontheotherhand,itisoftenpointedoutthatoncesustainability(支撑力)limitsarenearorarereached,therearedecreasingproductivitygains(or,perhapsmoreaccurately,increasingproductivelosses),andpeoplebecomeacostratherthananasset.Ifweassumethattherearesustainabilitylimitsandthatweareclosetoreachingtheselimitsataworldlevel,thenitisappropriatetocheckpopulationgrowth.
21.Accordingtothepassage,thepopulationargumentisfocusedon_______.
A.whethermorepeopleareapropertyoracost
B.whetherMexicoshouldcontrolitspopulationgrowthornot
C.whetherthedensityofpopulationinMexicoislargeorsmall
D.whatthestandardinternationalsustainabilitylimitis
22.WhichofthefollowingisTRUEaccordingtothefirstparagraph?
A.Mexicohassteppedintoanagingsociety.
B.ItisnotnecessaryforMexicotocontrolitspopulation.
C.Mexicopopulationisyoungerthanthatofdevelopedcountries.
D.ItisnotnecessaryforMexicotodevelopitsinfrastructure.
23.By"infrastructure"(Para.2)theauthormeans_______.
A.buildings
B.thebasicframeworkofacountry,suchasschools,services,etc.
C.socialdemands
D.servicesandproduction
24.Itmaybeinferredfromthe3rdparagraphthat_______.
A.itisn'tnecessaryforMexicotocontrolitspopulationgrowth
B.populationislikelytogrowataslowerpacethaninthepast
C.themorepeoplethereare,thegreaterthewealthpeoplecouldgenerate
D.Mexicoshouldcontrolitspopulationgrowthbecauseshebelongstothedevelopingcountries
25.Tocheckpopulationgrowthisnecessarywhen_______.
A.therearedecreasingproductivitygains
B.thereareincreasingproductivitylosses
C.weareclosetoreachingthesustainabilitylimitsataworldlevel
D.peoplebecomeacost
答案：21.B22.C23.B24.A25.C
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