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1、高考英语复习阅读理解专练 说明文8篇Passage1(2017北京,C)Measles(麻疹),whichoncekilled450childreneachyearanddisabledevenmore,wasnearlywipedoutintheUnitedStates14yearsagobytheuniversaluseoftheMMRvaccine(疫苗).Butthediseaseismakingacomeback,causedbyagrowinganti-vaccinemovementandmisinformationthatisspreadingquickly.Alread
2、ythisyear,115measlescaseshavebeenreportedintheUSA,comparedwith189foralloflastyear.Thenumbersmightsoundsmall,buttheyaretheleadingedgeofadangeroustrend.Whenvaccinationratesareveryhigh,astheystillareinthenationasawhole,everyoneisprotected.Thisiscalled“herdimmunity”,whichprotectsthepeoplewhogethurte
3、asily,includingthosewhocan’tbevaccinatedformedicalreasons,babiestooyoungtogetvaccinatedandpeopleonwhomthevaccinedoesn’twork.Butherdimmunityworksonlywhennearlythewholeherdjoinsin.Whensomerefusevaccinationandseekafreeride,immunitybreaksdownandeveryoneisinevenbiggerdanger.That’sexactlywhatishappeni
4、nginsmallneighborhoodsaroundthecountryfromOrangeCounty,California,where22measlescaseswerereportedthismonth,toBrooklyn,N.Y.,wherea17-year-oldcausedanoutbreaklastyear.Theresistancetovaccinehascontinuedfordecades,anditisdrivenbyarealbutverysmallrisk.Thosewhorefusetotakethatriskselfishlymakeotherssu
5、ffer.Makingthingsworsearestatelawsthatmakeittooeasytooptout(决定不参加)ofwhataresupposedtoberequiredvaccinesforallchildrenenteringkindergarten.Seventeenstatesallowparentstogetanexemption(豁免),sometimesjustbysigningapapersayingtheypersonallyobjecttoavaccine.Now,severalstatesaremovingtotightenlawsbyaddi
6、ngnewregulationsforoptingout.Butnoonedoesenoughtolimitexemptions.Parentsoughttobeabletooptoutonlyforlimitedmedicalorreligiousreasons.Butpersonalopinions?Notgoodenough.Everyoneenjoysthelife-savingbenefitsvaccinesprovide,butthey’llexistonlyaslongaseveryonesharesintherisks.1.Thefirsttwoparagraphssu
7、ggestthat . A.asmallnumberofmeaslescasescanstartadangeroustrendB.theoutbreakofmeaslesattractsthepublicattentionC.anti-vaccinemovementhasitsmedicalreasonsD.informationaboutmeaslesspreadsquickly2.Herdimmunityworkswellwhen
