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1、延长县高级中学高一英语暑假作业4阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每小题所给的四个选项（A、B、C和D）中，选出最佳选项。AIfyouwanttostayyoung,sitdownandhaveagoodthink.ThisistheresearchfindingofateamofJapanesedoctors,whosaythatmostofoutbrainsarenotgettingenoughexercise,andasaresult,weareg
2、rowingoldunnecessarilysoon.ProfessorTaijuMatsuzawawantedtofindoutwhyquitehealthyfarmersinnorthernJapanappearedtobelosingtheirabilitytothinkandreasonataratherearlyage,andhowthespeedofgettingoldcouldbesloweddown.WithateamofresearchersatTokyoNationalUniversity
3、,hesetaboutmeasuringbrainsizesofathousandpeopleofdifferentageswithdifferentjobs.Computertechnologyhelpedtheresearcherstogetmostexactmeasurementsofthesizesofthefrontandsidepartsofthebrain,whichhavesomethingtodowiththinkingandfeeling,anddecidethehumancharacte
4、r.Asweallknow，thebackpartofthebrain,whichcontrolstasklikeeatingandbreathing,doesnotcontact（萎缩）withage.Contractionoffrontandsideparts,ascells（细胞）dieoff,wasseeninsomepeopleintheirthirties,butitwasstillnotfoundinsomesixtyandseventy-year-olds.Matsuzawaconcluded
5、fromhisteststhatthereisasimplewaytopreventthecontraction■一usingthehead・Thefindingsshowthatcontractionofthebrainbeginssoonerinpeopleinthecountrythanthoseinthetowns.Thosewithleastpossibility,saysMatsuzawa,arelawyers,followedbyuniversityprofessorsanddoctors.Wh
6、ite-collarworkersdoingthesameworkdayafterdayingovernmentofficesare,however,aspossibletohavecontractingbrainsasthefarmworkers,busdriversandshopassistants・I.Theteamofdoctorswantedtofindout・A.atwhatpointpeoplegrowlivelonger.B.howtomakepeoplelivelongerC・thesize
7、ofcertainpeople'sbrains.D・whichgroupofpeoplearethebusiest2.Theirresearchfindingsarebasedon.cA.anexaminationoffarmersinnorthernJapanB.usingcomputertechnologyC.examiningthebrainsizesofdifferentpeopleD.testsgivenathousandoldpeople3.Thedoctor'stestsshowthat・A.o
8、urbrainscontractaswegrowolderB.onepartofthebraindoesnotcontractC・sixty-year-oldshavebetterbrainsthanthirty-year-oldsD・contractionofthebrainbeginssoonerinpeopleinthecountry4.Accordingtothearticle,aregro
