大学英语快速阅读第三版2电子版.docx
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大学英语快速阅读第三版2电子版
6.ALongandHealthyLife
Haveyouwishedforamagicpillormagicformula(方法)thatwouldletyoulivehappilyforever?
Ifyouhave,don’tfeelalone!
It’saverycommon,naturalwishthathasalonghistory.SpanishexplorersofthesixteenthcenturyeventriedtofindafountainofyouthinwhatisnowthestateofFlorida.Thewaterofthislegendary(传说中的)fountain,whichnoonehasyetfound,wasbelievedtorestoreyouthandgoodhealthtothosewhodrankit.
Biologiststodaydon’texpectthatanyonewillfindamagicalfountainofyouth.Growingolderisanaturalpartofthelifecyclethatcan’tbereversed(倒退).Ashumanbeingsgrowolder,organssuchastheheartandlungsmaystopfunctioningproperly.Sightandhearingmaybecomeweak.Andthehumanbodybecomesmorelikelytocomedownwithseriousillnessfromwhichitcannotrecover.
Consideredtogether,changesthatbringaboutthedecline(衰退)ofanorganismarecalledaging.Becauseofaging,manybiologistsbelievethattheremaybeamaximum(最大的)agelimittowhicheventhehealthiestorganismscanlive.Forhumanbeings,thismaximumagelimitisabout110years.
Perhapsthemostimportantthingthatyoucanlearnfromyourstudyofhumanbiologyisthatyouhavealotofcontrolovertheagingprocessinyourownlife.Infact;withinourcontrolaremanyphysicalandmentalfactorsthathavemuchtodowithaging.Forexample,eachofus,asrecentresearchindicates,candomanythingstohelppreventheartandvessel(血管)disease,whichcauseshalfthedeathseachyearintheUnitedStates.Wecanavoideatingalotoffattymeat.Eatingtoomuchofthesetypesofanimalfatscanleadtotheclogging(阻塞)andhardeningofbloodvessels.Wecancutbackonsmokingandhopefullyofsugarweeat.Wecanexerciseregularlyandstrengthentheheartandotherorgans.Andwecanremembertotaketimeouteachdayforourselves,timejusttorelax.Exercise,recreation(娱乐),andrelaxationallreducestress-innertensionthatishardonallbodyorgans.
Onefinalthingwecandoistotrytokeepawareofadvancesmadeinhealtheducation.Informationisoftenavailablefreeofchargefromhealthclinicsorschools.
(406words)
ComprehensionExercises
Ⅰ.Choosethebestanswerstothefollowingquestions.
1.WhichofthefollowingistheleadingcauseofdeathintheUnitedStates?
A.Heartdisease.
B.Cancer.
C.Alcohol.
D.Smoking.
2.Whathappensaspeoplegrowolder?
A.Theydreamofamagicpilltohelpthemliveahappyandlongtime.
B.Theycomedownwithseriousillnesses.
C.Theirorgansbecomeweakandmaystopworkingproperly.
D.Theirbloodvesselsbecomeclogged.
3.Intheopinionofbiologists,___.
A.theagingprocesscanbereversed
B.theagingprocesscanbecontrolledandsloweddown
C.theagingprocesscanbegotridof
D.theagingprocesscangobeyonditslimit
4.Wecanslowdowntheweakeningofallourbodyorgansby___.
A.noteatinganimalfat
B.limitingdrinkingandsmoking
C.exercise,recreationandrelaxationtobloodvessels
D.preventingthecloggingandhardeningofbloodvessels
5.Besidesphysicalandmentalfactors,whichofthefollowingalsocontributestolivingalongandhealthylifeaccordingtothepassage?
A.Healtheducation.
B.Traditionalmedicine.
C.Artificialorgans.
D.Theinventionofmagicpills.
Ⅱ.Judgewhetherornotthefollowingstatementsagreewiththeinformationgiveninthepassage,andmarkYforYES,NforNO,orNGifinformationisnotgiveninthepassage.
()1.Fewpeoplehavethewishoffindingamagicpillthatwouldbeofhelptolivehappilyforever.
()2.Manybiologistsbelievethateachspecieshasanaturalmaximumagelimit.
()3.Fromthepassageweknowthatthereismuchwecandotohelppreventmanydiseases.
()4.Mentalfactorshavelittletodowithgoodhealth.
()5.Doctorsbelievesthatregularexercisereducesthechancesofgettingheartdisease.
7.TheEarth'sPast
Ifthehistoryoftheearthcouldbecompressed(压缩)intothespanofoneyear'stime,thestoryofthehumanracewouldbewrittenasthethelasttwohoursofthefinalday!
ThisfactgivesyouanideaofjusthowoldtheEarthisnowrittenrecordtotellustheEarth'sgeologicalpast,theEarthhasleftarecordintheformoffossils.
Afossilisthepreservedremainsortracedofanancientlivingthing.Fossilsaremostoftenfoundburiedinrock,buttheymaybones,shells,andwoodyalsobefoundincaves,ancienttar(沥青)beds,andthesolidicethatcoveredtheEarth'spolarregions.Inalltheseplaces,fossilsareprotectedfromdamagingeffectsofweatheringanderosion(侵蚀).
Usuallyonlythehardpartsarepreserved.Thehardpartcanincludeones,shells,andwoodytissues.Thesoftparts,likeflesh,eitherdecayorareeatenbyanimalsbeforetheycanbepreserved.Oneexceptioniswhenanorganismissubjecte