2023名校版高考英语阅读理解精读含答案sw

2023名校版高考英语阅读理解精读含答案Asweage,evenifwe’rehealthy,theheartjustisn’tasefficientinprocessingoxygenasitusedtobe.Inmostpeoplethefirstsignsshowupintheir50sorearly60s.Andamongpeoplewhodon’texercise,thechangescanstartevensooner.“Thinkofarubberband.Inthebeginning,itisflexible,butputitinadrawerfor20yearsanditwillbecomedryandeasilybroken,”saysDr.BenLevine,aheartspecialistattheUniversityofTexas.That’swhathappenstotheheart.Fortunatelyforthoseinmidlife,Levineisfindingthatevenifyouhaven’tbeenanenthusiasticexerciser,gettinginshapenowmayhelpimproveyouragingheart.Levineandhisresearchteamselectedvolunteersagedbetween45and64whodidnotexercisemuchbutwereotherwisehealthy.Participantswererandomlydividedintotwogroups.Thefirstgroupparticipatedinaprogramofnonaerobic(无氧)exercise—balancetrainingandweighttraining—threetimesaweek.Thesecondgroupdidhigh-intensityaerobicexerciseundertheguidanceofatrainerforfourormoredaysaweek.Aftertwoyears,thesecondgroupsawremarkableimprovementsinhearthealth.“Wetookthese50-year-oldheartsandturnedtheclockbackto30-or35-year-oldhearts,”saysLevine.“Andthereasontheygotsomuchstrongerandfitterwasthattheirheartscouldnowfillalotbetterandpump(泵送)alotmorebloodduringexercise.”Buttheheartsofthosewhoparticipatedinlessintenseexercisedidn’tchange,hesays.“Thesweetspotinlifetostartexercising,ifyouhaven’talready,isinlatemiddleagewhentheheartstillhasflexibility,”Levinesays.“Weputhealthy70-year-oldsthroughayearlongexercisetrainingprogram,andnothinghappenedtothematall.”Dr.NiecaGoldberg,aspokeswomanfortheAmericanHeartAssociation,saysLevine’sfindingsareagreatstart.Butthestudywassmallandneedstoberepeatedwithfarlargergroupsofpeopletodetermineexactlywhichaspectsofanexerciseroutinemakethebiggestdifference.32.WhatdoesLevinewanttoexplainbymentioningtherubberband?A.Therightwayofexercising.B.Thecausesofaheartattack.C.Thedifficultyofkeepingfit.D.Theagingprocessoftheheart.33.Inwhichaspectwerethetwogroupsdifferentintermsofresearchdesign?A.Dietplan.B.Professionalbackground.C.Exercisetype.D.Previousphysicalcondition.34.WhatdoesLevine’sresearchfind?A.Middle-agedheartsgetyoungerwithaerobicexercise.B.High-intensityexerciseismoresuitablefortheyoung.C.Itisnevertoolateforpeopletostarttakingexercise.D.Themoreexercisewedo,thestrongerourheartsget.35.WhatdoesDr.NiecaGoldbergsuggest?A.Makinguseofthefindings.B.Interviewingthestudyparticipants.C.Conductingfurtherresearch.D.Clarifyingthepurposeofthestudy.DCACAnewstudyshowsthatincreasesinextremewinterweatherinpartsoftheUSarelinkedtoquickenedwarmingoftheArctic.Overthepastfourdecades,warmingintheArctichasbeenfarmoredefinitethanthatintherestoftheworldandhascausedarapiddecreaseofsummerseaice.HeatingintheArctichasultimatelydisturbedthecircularpatternofwindsknownasthepolar

vortex

(旋涡).Asaresult,itgotstretchedoutofshapeandslidsouthwardoffthepole.Scientistsbelievethis

vortex

stretchingprocessledtothedeadlyTexascoldwaveinFebruarythisyear.“ThepolarvortexovertheArcticusuallylocksincoldairatthepolesanddoesnoteasilymovesouth.Thestrongerthewinds,themoretheairinsideiskept,andthecolderitgets,”explainedleadresearcherDr.JudahCohen,who’saprofessorattheMassachusettsInstituteofTechnology.“MeltingiceintheArcticandrisingtemperaturescandisturbtheArcticvortex,makingcoldairnolongerlockedintheArctic,butmovesomefarthersouth.”TheresearcherssaythattheirfindingsarebasedonbothobservationsandmodellingandtheyshowaphysicallinkbetweenclimatechangeintheArctic,thestretchingofthepolarvortexandtheimpactsonground.Theresearchersbelievetheirworkcouldimprovepredictionsaboutthebeginningofextremecoldwinterevents.Theresearchteamalsobelievesthattheirfindingswillhelppeopleunderstandthatglobalwarmingiscomplexandperhapsletgooftheideathatcolderwintersmeanclimatechangeisn’thappening.“Inthepast,thesecoldextremesovertheUSandRussiahavebeenusedtojustifynotreducingcarbon,butthere’snolongeranyexcusenottostartreducingemissionsrightaway,”saidDr.Cohen.28.Whatisparagraph2mainlyabout?A.Theexplanationgivenbyscientists.B.TheformationofTexascoldwave.C.Thedecreaseofsummerseaice.D.Thepolarvortex’sbeingdisturbed.29.Whatisthefunctionofpolarvortex?A.Preventingcoldairfromescaping.B.Helpingcoldairmovefreely.C.Acceleratingthemeltingofice.D.Makingthewindstronger.30.Whatcanbeinferredfromthelastparagraph?A.Globalwarmingmerelycausesunnecessaryfear.B.Wea