高考阅读理解C篇集训（六）

高考阅读理解C篇集训（六）阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在题卡上将该项涂黑。P051Thedemanding2025federalCorporateAverageFuelEconomy(CAFE)goalof54.5milespergallonacrossanautomaker’sfleet(车队)isoneofthedrivingfactorsbehindaseriesofadvancementsinmoreefficientenginetechnologies.Tomeettheincreasingfuelstandards,automakershavereliedonarangeofvehicletypes.Mostpeopletendtothinkofhybrids(混合的)andelectricvehicleswhentalkturnstoenergyefficientcars.Ahybridvehicleusesbothelectricdriveandaninternalenginetopushthevehicle.Whenthedriverslows,thebatterypartiallyrechargesthroughregenerative,braking.Today,therearehybridversionsofmanymodernmid-sizecars.Themostrecentadvancementcomesintheformofplug-inhybridswithlarger(andmoreexpensive)batterypacksthatcanbechargedathomeortheoffice,allowingyoutodrivegreaterdistancesonelectricpower,whichsignificantlyimprovesoverallaveragefueleconomyonmosttrips.Electriccarsarealsoevolving,butstillconfronthurdleswhenitcomestobatterycostandasomewhatlimitedrangeincertainmodels.Promisingelectricsareonthehorizon,butit’sbesttoreservejudgmentuntilweseewhethertheydeliveratapricepointmoreconsumerscanafford.Hydrogen(氢)fuelcellvehiclesarealsoadvancing.Essentially,theseareelectriccarswiththeelectricitysuppliedbyhydrogenandoxygenpassingthroughafuelcellstack(电磁堆).They’resuperclean,producingonlywatervaporandalittleheatatthetailpipe.Untilwehaveamuchlargerhydrogen-fuelbasicfacilities,thesetypesofvehicleswillbelimitedtoregionaluseinmajormetroarea.Asyoucantell,alongwithenginetechnology,advancementshavebeenmadeinmanyotherareas.Withthetechnologicalcompetitionamongautomakers,energyefficientcarsareevolvingatanimpressivepace,andthat’sagoodthingfortheplanet.Whydoautomakersdevelopvarioustypesofvehicles?A.Topromotethecarproduction.B.Toboosttheautomobileindustry.C.Tosatisfythecustomers’demand.D.TomeetthefederalCAFE’sstandards.Whatisthelatestimprovementofthehybridcar?A.Itcanbeappliedtocarsinvarioussizes.B.Itisequippedwithplug-inbatterypacks.C.Itusesaninternalengineandelectricdrive.D.Itcanbepartiallychargedviaspeedingdrive.Whatpreventsthehydrogen-fuelcellvehiclesbeingwidelyused?A.Thehighcostofproduction. B.It’sdemandofsupercleanfuel.C.Thelackofsupportingfacilities. D.Itsneedofwatervaporandheat.What’stheauthor’sattitudetothefutureofenergyefficientcars?A.Supportive. B.tolerant. C.Critical. D.Doubtful.28-31DBCAP052Imagineaplateboldingtwo’strawberries,identicalinappearance.Onecameoutofasupermarketbox,meaningitwasprobablyharvestedwhenitwasstillunripe.Bythetimeitreachedtheplateitmayhavebeenoffthevine(藤)fortwoweeks.Theotherstrawberrywaspickedfromagardenminutesbeforebeingeaten.Supermarketstrawberriesarenotentirelywithoutadvantages:theyareconvenientandstillavailableeveninwintermonths.ButthetwoberriesdifferfromeachotherinthesamewaythathearingmusicinaconcerthalldiffersfromlisteningtoitonanoldCDplayer.Thehome-grownfruitisaneatablecaseformakingahomegarden.Yourcolumnist,wholongconsideredgardeningacompletewasteoftime,advancesthisargumentwithgreatenthusiasm.Plantingcool-weathergreens,asgardenersacrossthenorth-eastofAmericaarenowdoing,canseemnonsense,sinceconvenient,continuouslywell-stockedsupermarketshelvesareavailableallweek.Butthesamecouldbesaidofcooking:therearemanycheapanddecentrestaurantsaround,sowhybothertomakeyourownmeals?Thatattitudemisconstruestheultimateappealofgardening:itmistakestheproductforthepurpose.Itistruethatagardencanproducetomatoesandcarrotsofincomparablesweetness,andceltuce(芹莴)andherbsthattastelikethemselvesratherthantheplastictheyareusuallypackagedin.Whilefinding,let’ssay,celtuceintheshopscantakesometime,effort,andexpense,growingyourownvegetablesensuresareliablesupply.Ontheotherhand,agarden,especiallyintheearlyyears,canproducelittlebutfrustration.Greenhandsmayplantthewrongcropsfortheirsoil.Andevenexpertgardenerscanloseaseason’sharvesttounco-operativeweather.Nomatter.Therealjoyofgardeningisthetimespentdoingit.Thedeepestpleasure—aswithcooking,writingoralmostanythingworthwhile—isintheworkitself.Togardenistopatiently,lovinglyanddiligentlyhelplifebecomestrongandhealthy,inthegroundandaboveit.Whatcanweknowaboutthesupermarketstrawberries?A.Theylookdistinctfromhome-grownones.B.Theygiveoutpleasantandfreshsmell.C.Theyarepickeddaysbeforefullygrown.D.Theyareplantedtypicallyinwinter.Whatdoestheunderlinedword“misconstrues”meaninparagraph4?A.Misinterprets. B.Transforms. C.Mistrusts. D.Highlights.Whydoestheauthormentionthefailuresingardening?A.Towarmreadersnottotakeupgardeningeasily.B.Toadvisereaderstoworkinharmonywithnature.C.Tomakereadersreflectonthemethodsofgardening.D.Tohelpreadershaveawholepictureofgardening.Whatistheauthor’sopinionongardening?A.I’sadifficultandtime-consumingprocess.B.Productsofgardeningmakeitworthwhile.C.Thetimeandeffortsinvestedmakeitadelight.D.Itreducesthecostofpurchasingvegetables.8.C9.A10.D11.CP053TwoofnaturalistCharlesDarwin’snotebooksthatwerereportedstolenfromCambridgeUniversity’slibraryhavebeenreturned,twodecadesaftertheydisappeared.TheuniversitysaidonTuesdaythatthemanuscriptswereleftinthelibraryinsideapinkgiftbag,alongwithanotewishingthelibrarianahappyEaster.Thenotebooks,whichincludethe19th-centuryscientist’sfamous1837“TreeofLife”sketchonevolution,wentmissingin2001afterbeingremovedforphotographing,thoughatthetimethestaffbelievedtheymighthavebeenmisplaced.Afterthestaffhadsearchedthelibrary’scollectionof10millionbooks,mapsandmanuscripts,butfailedtofindthem,theywerereportedtopoliceinOctober2020asstolen.DarwinfilledthenotebookswithideasshortlyafterreturningfromhisvoyagearoundtheworldontheshipHMSBeagle,developingideasthatwouldbloomintohislandmarkworkonevolutionOntheOriginofSpecies.Thenotebooksareestimatedtobevaluedatmillionsofdollars.OnMarch9,2022,thebooksreappeared,leftinapublicareaofthelibrary,outsidethelibrarian’soffice,whichisnotcoveredbysecuritycameras.Theuniversity’sdirectoroflibraryservices,JessicaGardner,saidherreliefatthebooks’reappearancewas“profoundandalmostimpossibletoproperlyexpress.”“ThenotebookscannowretaketheirrightfulplacealongsidetherestoftheDarwinarchives(档案)atCambridge,attheheartofthenation’sculturalandscientificheritage,alongsidethearchivesofSirIsaacNewtonandProfessorStephenHawking,”shesaid.ThenotebooksaresettogoonpublicdisplayfromJulyaspartofaDarwinexhibitionatthelibrary.Cambridgeshirepolicesaidtheirinvestigationwascontinuing,“andwearefollowingupsomelinesofinquiry.Wealsorenewourappealforanyonewithinformationaboutthecasetocontactus,”theforcesaid.Whatcausedthenotebookstogomissing?A.Beingleftinapinkplasticbag.B.Gettingremovedbytwonaturalists.C.Gettingmixedwithothercollections.D.Beingtakenawayfortakingpictures.Whyweren’tthenotebooksreportedtothepoliceuntil2020?A.Thestaffhadmisplacedthem.B.Thestaffmisjudgedthesituation.C.Thenotebookswereguaranteedtobereturned.D.Thenotebooksweretooworthlesstobereported.HowdidJessicaGardnerfeelaboutthereappearanceofthenotebooks?A.Anxious.B.Disturbed.C.Indifferent.D.Overjoyed.Whatcanbeinferredfromthelastparagraph?AThepoliceweretodropthecase.B.Newwitnesseshavecomeforward.C.Thestealerhasyettobedetermined.D.Theinvestigationcametoadeadend.28.D29.B30.D31.CP054Morethanhalfatrilliondollars.That’stheestimatedvalueofallthestuffthatU.S.shoppersboughtlastyearonlytoreturnit—morethantheeconomyofIsraelorAustria.WetriednewbrandswithunfamiliarsizesafterseeingthemonTikTok.Weoverboughtfortheholidays,andweshoppedoverlyonline,wherereturnsarebetweentwoandfivetimesmorelikelythanthatfromstores.Wheredoesitallgo?TaketheblanketIboughtonholidaysaleforexample.Iopenedthepackage,onlytodiscoveritwasjusttoosmallformynewsofa.SoIreturnedit.Sorry,blanket!Whatwillhappentoit?“Yourblanketisverylikelytobeinalandfill,”saysHitendraChaturvedi,asupplychainmanagementprofessoratArizonaStateUniversity.“Thatiswhatconsumersdon’trealize—thelifeofareturnisavery,verysadpath.”Valueisthebigthreshold(门槛):Istheproductworththecostofshippingbackandpayingsomeonetoinspect,clean,repairortest?Expertsestimatethatretailers(零售商)throwawayabout25%oftheirreturns.Everyyear,U.S.returnscreatealmost6billionpoundsoflandfillwaste.Manyothersgetresoldindiscountandoutletstores.Somegotosellersonwebsites.Somegetdonatedtocharityorrecycled.“Theseoptionshaveincreasedoverthepastdecade,allowingmoreandmorereturnstofindanewhome”,saysMarcusShen,chiefoperatingofficerofB-Stock,aplatformwhereretailerscanreselltheirreturns,oftentosmallerstores.Ascompaniescompeteonflexiblereturnpolicies,technologyisalsoslowlyplayingapart:helpingshoppersbuytheright-sizesweaterorpictureanewblanketinsidetheirroom.Mostimportantly,Shensays,shoppersthemselvesaregettingmoreandmorecomfortablewithbuyingstuffthat’snotexactlybrand-new.“Theideaofthatisnolongerscaryforus,right?”hesays.Onhisholiday-returnsagendaisanelectric,self-heatingcoffeemugthathehasneveropened,andhefeelsconfidentitwillfindahappynewbuyer.Whatisparagraph1mainlyabout?A.ThechallengefacingtheAmericaneconomy,B.Theurgencytocutdownononlineshopping.C.Thereturningproblemcausedbyoverbuyingonline.D.Thecostoffindingnewhomesforreturnedgoods.Whydosomereturnsendupinlandfills?A.It’srequiredbythereturnpolicies.B.Itsavesretailers6billionpoundsayear.C.It’simpossibletoputreturnstootheruses.D.It’smoreeconomicallyefficientforretailers.Howdoestechnologycontributetolessreturning?A.Byhelpingshoppersmakebetterdecisions.B.Byrestoringthenewnessinreturnedgoods.C.Byimprovingthereturnpolicy-makingprocess.D.Bydrawingpicturesofthegoodsfortheshoppers.Whichofthefollowingexamplesindicatesadesirableend-resultforreturns?A.TikTokitems. B.Thecoffeemug.C.Theblanket. D.Aright-sizesweater.28.C29.D30.A31.BP055AsagingPopulationgetsbiggeranddementia(老年痴呆症)morecommon,morefamiliesarestrugglingwithacomplexquestion:Howdoyousupportalovedonewithdementia,especiallywhenyouhaveafull-timejobandseveralkids?RegUrbanowskimayhaveananswertothispressingissue:ROBOTS.HeandhisteammanagedtodevelopanewtypeofrobotsnamedTProbots.Lookinglikestand-upvacuumcleanersattachedtoaniPad,theycanbeactivatedremotelyviaasmartphoneandguidedremotelybyacontrollerappsimilartothewayamouseisusedonadesktopcomputer.Allpossessaudioandvisualcommunicationcapabilities,allowingtheoperatortobe“intheroom”tointeractwithMomorDad.HebelievesthatcaregiversandfamilymemberscanuseaTProbotto“lookin”onpeoplewithmilddementia.Hesays,“TProbotsprovideaneffectivesolutionforminimizingcaregiverburden,especiallyforthosewhohavecareerorotherout-of-homeactivities.”UrbanowskiandhisteamhaveconductedastudythatinvolvesprovidingTProbotsfor15Manitobafamilies.Theserobotsareprogrammedtoprovideremindersofnecessarydailyroutineliketurningoffthegas,takingmedicineandhavingdinner.Theywillalsohelpensurepatientsaregettingtheexercisetheyneedtomaintaintheirhealthandwell-being.ErinCrawford,ProgramDirectorwiththeAlzheimerSocietyofManitoba,saysshehasfaiththatTProbotswillprovebeneficial,particularlywhenitcomestoremindingpeoplewithdementiatodocertainthingsatcertaintimes.“Itmeansthatfamilymembersthatcan’tbethere,forwhateverreason,knowthatthosethingsaretillhappening,”shesays.WhatcanweinferaboutTProbotsfromParagraph3?A.It’seasytooperate. B.Itcancleantheroom.C.It’sconvenienttocarry. D.Itcanbeusedonacomputer.HowwillTProbotshelpthosewithdementia?A.Byhavingdinnerwiththem. B.Byturningoffthegasforthem.C.Bydoingactivitieswiththem. D.Byremindingthemtotakepills.What’sErinCrawford’sattitudetothefutureofTProbots?A.Optimistic. B.Cautious. C.Doubtful. D.Critical.Whatisthemainideaofthetext?A.TProbotsprovideanewsolutiontodementia.B.TProbotshelptotakecareofdementiapatientsC.CaregiversofdementiawillbereplacedbyTProbotsD.Urbanowskiandhisteamaredevelopinganewrobot28-31ADABP056SomeItalianarchitectshavecompletedthefirst3D-printedhomemadefromclayrecently.ItiscalledTECLA,whichcomesfrom“technology”and“clay”.Itsfounder,MarioCucinella,pointsoutthatbuildinghomesfromearthisnotnew.Adobe—madefromamixofearth,waterandorganicmaterial—isoneoftheworld’searliestconstructionmaterials,knownforitsfirmness,andbiodegradability.Hehopesthatitsdesigncanbecomeapracticaloptiontohousepeoplewholackadequatehousingduetofinancialissues.Overthepastfewyears,many3D-printedhomes,andcommunitieshave.beenconceptualized,promisinglowconstructioncosts.Butwhilepreviousstructureswerebuiltusingconcreteorplastic,TECLAwasmainlybuiltfromsoilatthesitemixedwithwaterandfibersfromricehusks.Cucinellabelievesthisapproachcanbeadoptedindifferentpartsoftheworld,usingwhateverlocalmaterialsareavailable,andcouldbeparticularlyhelpfulinremoteareas,whereindustrialconstructionmaterialsarehardertocomeby.Printingwithclayhasitsdrawbacks.It’samuchslowerprocessthanquick-dryingconcrete3Dprintedhomesandall-clayskyscrapersarenotlikelyinthefuture.However,theuseofavailablesoilandtheprogram’seaseofconstructionmeanthatTECLAcouldbewell-suitedtoprovidehousinginmanydifferentcountries.Itisestimatedthatby2030,3billionpeoplewillrequireaccesstoaccessibleandaffordableresidences.“Youcanbuildthiskindofhouseinmanymoreplaceswhenyouarenotdependentonsomespecificproduct,”Cucinellaexplained.TECLAhasdrawnwideattention.“I’mnotinthepositiontosaythiswillbethefutureofallhousesontheplanet,”Russo,another3Dprintingarchitectsaid.However,headded,“Ithinkthisrevolutionof3Dprintingistogivepeopleadegreeoffreedominhowtodothings,withoutbeingconnectedtoabig,professionalindustry.”What’sthepurposeofTECLA?ATomake3D-printedhomesfirmer.B.Toassistinsolvinghousingissues.C.Toprovidealternativesforhousebuyers.D.Tohelpthepoorthroughfinancialdifficulty.WhatcanwelearnabouttheconstructionofTECLA?A.It’squiteexpensive. B.Ittakesashortertime.C.It’sademandingprocess. D.It’sflexibleinmaterialselection.WhatisRusso’sattitudetoTECLA?A.Favorable. B.Critical. C.Doubtful. D.Tolerant.What’sthetextmainlyabout?A.Adesignthatcanreplacethepreviouspatterns.B.Atechnologythattakestheleadinarchitecture.C.Astructurewheretraditionmeetsnewtechnology.D.Atrendwheretechnologyiscoupledwitharchitecture.28-31BDACP057Indianstepwells(阶梯井)arenothingnew,havingprovidedaccesstofreshwaterforyearsbeforetheywereabandoned.AndwhiletheyareapartofIndianculturalheritage,theyhadlosttheirpurposeforsometime,untilnow.AstheextremedroughtsarerockingIndia,theseancientstepwellsarerestoredforwhattheydobest—providingwater.Shapedlikeanupsidedownpyramid(金字塔)diggingintothegroundandlinedbythousandsofsteps,stepwellscancollectrainwater.Theyarewonderfullyefficientatprovidingwaterfornearly1,500years.Sadly,over3,000stepwellshaveeitherbeenabandonedorlefttorot,withsomeevencoveredbygarbage.Now,thankstotherestorationprogramme(alsoknownasBAORIS),stepwellswillcomefullcircle.Sincetherestorationprocessbegan,atleast15wellshavebeenrestoredinthecityofDelhi.Thecostwillbearound$60,000,butbydoingso,thewatersupplyforthecitycouldreachanadditional33,000gallons.RajkumarSharma,alocalcitizen,said,“Iwaselatedatthereuseofthestepwells.Thestepwellinourvillagewastheonlysourceofwater.Withtime,ithaddriedupandchangedintoaplaceforrubbish.Wenowhaveaccesstocleanwaterfordrinkingandotherpurposes.”HistorianRanaSafviexplained,“Costlyandpainstakingasthisprogramis,repairingthesetraditionalstepwellstotheirformergloryprovideswaterformany.Butapartfromthat,italsospotlightsthebeautifularchitecturefeaturesofancientIndia.Thishelpsattracttouristsandcanalsobeusedinreligiousceremonies.”Sheadded,“ThesestepwellrestorationsnotonlyhelpIndiareducetheimpactofdrought,buttheyareapromiseofabetterfutureforIndiaoverall.”WhyarethestepwellsinIndiarestored?A.Theyhaveanewpurpose. B.Theyareculturalheritage.C.Theycaneasewatershortage. D.Theyareinpoorconditions.Whatdoestheunderlinedword“elated”inParagraph3mean?A.Encouraged. B.Shocked.C.Impressed. D.Thrilled.What’sRanaSafvi’sattitudetotheprogram?A.Cautious. B.Favorable.C.Tolerant. D.Uncaring.Whatdoesthistextmainlytalkabout?A.Stepwellsarebroughtbacktolife.B.StepwellsmakeIndiamoreattractive.C.Stepwellsofferanewsolutiontodrought.D.StepwellsprovideconvenienceforIndians.28-31CDBAP058ArulMathur,an11thgradestudentinCaliforniacouldhavefoundtheanswertosavingpeople’shomeswhenthreatenedbywildfiresandothertypesoffiresthatcouldaffectthemandtheirproperty.Tobestdealwithwildfire“season”,hecreatedafire-activatedextinguisher(灭火器)calledF.A.C.E..Basically,itcanworkasasingledevicethatisabletoprotectfire-riskareasaroundsomeone’shouselikeinthekitchenorbedroom.RecentlymovingwithhisfamilytoCalifornia,hecamefacetofacewiththepossibilityofwildfires.Whenexplaininghisinspirationbehindhisinvention,hesaid,“Iheardaboutthehundredsofthousandsofpeople,includingmynewfriends,whoabandonedtheirhouseseveryyeartofleefromwildfires,butIneverthoughtthatIcouldbeoneofthosepeople.Finally,inthesummerof2019,awildfirethreatenedtoforcemyfamilytoleaveourhome.Atthatmoment,IknewthatIneededtodosomethingaboutit.”F.A.C.E.worksthroughasensoronthedevice.Whenheateduptoaparticulartemperature,thechemicalsinsideburstandreleaseaspraythatstopsfirespreadingatleastfivetosixfeetinalldirectionswiththehelpofasprinkler(喷洒器)attachedtoit.Whenplacedincertainstrategicareas,theycouldactuallyworktogetherinordertostopbushfiresfromturningintowildfires.Meanwhile,theycouldalsostopakitchenorlivingroomfirefrombecomingamassivehousefire.Thisnewsolutiontowildfireswillbesoldfor$120onceproductionstarts.Currently,theonlyothersimilaralternativeforhisinventionistheautomaticsprinklersystemsthatmaybelavishforsomefamilies.Theyfirstneedtobeplacedinthehomeduringearlyconstructionofthehouse,andtendtocostaroundthousandsofdollars.WhatmadeMathurdecidetoinventF.A.C.E.?A.HismovetoCalifornia. B.Hisencounterwithawildfire.C.Thecomingwildfire“season”. D.Thepropertylossesofhisfriends.WhatdoesParagraph4mainlytalkabout?A.Theadvantagesofthedevice.B.Thecomponentsofthedevice.C.Theworkingprincipleofthedevice.D.Theoperatingprocedureofthedevice.Whatdoestheunderlinedword“lavish”inParagraph5mean?A.Complex. B.Time-consuming.C.Inefficient. D.Costly.What’stheauthor’spurposeofwritingthistext?A.Tointroduceanewinvention.B.Topraiseateenager’screativity.C.Toadvertiseanewfireextinguisher.D.Tosuggestanewwayoffightingfires.28-31BCDAP059Foralmostallofhumanhistory,theEarth’spopulationhastendedtobeyounger.ButsincethelastWorldPopulationDayonJuly11,amajorshiftoccurred:Therearenowmorepeopleaged65andolderthanthereareunderagefive.WorldPopulationDaywasestablishedbytheUnitedNationsDevelopmentProgramin1989tobringattentiontopopulationissues.Havingmorepeopleontheplanetisnottheonlyconcern,though,sinceapopulation’sagestructurematterstoo.Increasedlifetimeisaremarkablehumansuccessstory,buthavingmoreelderlypeoplealsocreatesanumberofsocioeconomicconcerns.Theglobalpopulationwillcontinuetoageasthesetwogroupsgrowinoppositedirections.By2100,thepercentageofthepopulationaged65andolderwillrisetonearly25percent—aboutfivetimesthatofchildrenunderfive.“Mostdevelopedcountrieshavebeenagingforacentury,givingthemtimetoprepareforthechanges.Butdevelopingcountrieswillbecomeoldbeforetheybecomerich,“saysresearcherToshikoKaneda.ManycountriesinLatinAmericaandAsiaareagingmuchfasterandhavelesstimeandresourcestopreparehealth-caresystems.Whataretheconsequencesofanolderglobalpopulation?Supportingelderlypeopleismoreexpensivethancaringforyoungones.Pressingissuesariselikehowtoprovidelong-termcare,andmaintainalaborforce.IndevelopedregionslikeEurope,where10percentofthepopulationoverage50ischildless,elderlycareisamajorworry.“Notasinglecountryhasbeenabletochangedecliningtrendsinfertility(生育)despitegovernmentrequestsforpeopletoreproduceashasbeendoneacrossEuropeandinJapan,”Kanedasays.“Theagingtrendiscontinuous.”Butdecliningfertilityratescanhavepositiveeffectstoo,saysKaneda.Whenfertilityratesdeclinebutthepopulationhasn’tagedyet,governmentscanspendmoreonsecondaryandhighereducation,andbenefittheeconomy.BothThailandandSouthKoreahaveseizedtheopportunityduringthisidealperiod.Whatdoweknowabouttheglobalpopulation?A.Ittendedtobeyoungeruntilnow.B.PeoplearelivinglongerandhavingfewerkidsC.Agestructuremattersmorethanpopulationsize.D.Developedcountriesarefacingtougherchallenges.Whichchartshowstheglobaltrendinthepercentageofchildrenunderfive?A. B. C. D.What’sKaneda’sattitudetowardstheglobalpopulationissue?A.Critical. B.Objective. C.Optimistic. D.Doubtful.Whatisthetextmainlyabout?A.Thedecliningtrendinthefertilityrates.B.Theconsequencesoftheagingpopulation.C.TheestablishmentofWorld