六級(jí)難度閱讀理解100篇

1、英語六級(jí)難度閱讀理解100篇1Wecanbeginourdiscussionof“populationasglobalissue”withwhatmostpersonsmeanwhentheydiscuss“thepopulationproblem”:toomanypeopleonearthatoorapidincreaseinthenumberaddedeachyear.ThefactsarenotindisputeItwasquit

2、erighttoemploytheanalogythatlikeneddemographicgrowthto“alongthinpowderfusethatburnssteadilyhaltinglyuntilitfinallyreachesthegeexplodes.”Tounderstthecurrentsituationwhichisacterizedbyrapidincreasesinpopulationitisnecessar

3、ytounderstthehistyofpopulationtrends.Rapidgrowthisacomparativelyrecentphenomenon.Lookingbackatthe8000yearsofdemographichistywefindthatpopulationshavebeenvirtuallystablegrowingveryslightlyfmostofhumanhisty.Fmostofourances

4、tslifewashardoftennastyverysht.Therewashighfertilityinmostplacesbutthiswasusuallybalancedbyhighmtality.Fmostofhumanhistyitwasseldomthecasethatoneintenpersonswouldlivepastftywhileinfancychildhoodwereespeciallyriskyperiods

5、.Oftensocietieswereincleardangerofextinctionbecausedeathratescouldexceedtheirbirthrates.Thusthepopulationproblemthroughoutmostofhistywashowtopreventextinctionofthehumanrace.Thispatternisimptanttonotice.Notonlydoesitputth

6、ecurrentproblemsofdemographicgrowthintoahisticalperspectivebutitsuggeststhatthecauseofrapidincreaseinpopulationinrecentyearsisnotasuddenenthusiasmfmechildrenbutanimprovementintheconditionsthattraditionallyhavecausedhighm

7、tality.Demographichistycanbedividedintotwomajperiods:atimeoflongslowgrowthwhichextendedfromabout8000BC.tillapproximatelyAD.1650.Inthefirstperiodofsome9600yearsthepopulationincreasedfromsome8millionto500millionin1650.Betw

8、een1650thepresentthepopulationhasincreasedfrom500milliontomethan4billion.itisestimatedthatbytheyear2000therewillbe6.2billionpeoplethroughoutthewld.Onewaytoappreciatethisdramaticdifferenceinsuchabstractnumbersistoreduceth

9、etimeframetosomethingthatismemanageable.Between8000BC1650anaverageofonly50000personswasbeingaddedannuallytothewld’spopulationeachyear.Atpresentthisnumberisaddedeverysixhours.Theincreaseisabout80000000personsannually.1.Wh

10、ichofthefollowingdemographicgrowthpatternismostsuitablefthelongthinpowderfuseanalogyA.Avirtuallystableslightlydecreasingperiodthenasuddenexplosionofpopulation.B.Aslowgrowthfalongtimethenaperiodofrapiddramaticincrease.C.T

11、oomanypeopleonearthafewrapidincreaseinthenumberaddedeachyear.D.Alongperiodwhendeathratesexceedsbirthratesthenashtperiodwithhigherfertilitylowermtality.2.Duringthefirstperiodofdemographichistysocietieswereoftenindangerofe

12、xtinctionbecause___.A.onlyoneintenpersonscouldlivepast40.B.therewashighermtalitythanfertilityinmostplaces.C.itwastoodangeroustohavebabiesduetothepoconditions.D.ourancestshadlittleenthusiasmfmechildren.3.Whichstatementist

13、rueaboutpopulationincreaseA.Theremightbeanincreaseof2.2billionpersonsfromnowtotheyear2000.B.About50000babiesarebneverysixhoursatpresent.C.Between8000BCthepresentthepopulationincreaseisabout80000000personseachyear.D.Thepo

14、pulationincreasedfasterbetween8000BC1650thanbetween1650thepresent.4.Theauthofthepassageintendsto___.A.warnpeopleagainstthepopulationexplosioninthenearfuture.parethedemographicgrowthpatterninthepastwiththatafter1650.C.fin

15、doutthecausefrapidincreaseinpopulationinrecentyears.D.presentusaclearcompletepictureofthedemographicgrowth.5.Thewd“demographic”inthefirstparagraphmeans___.A.statisticsofhuman.B.surroundingsstudy.C.accumulationofhuman.D.d

16、evelopmentofhuman.答案：ABADA2Mostofusaretaughttopayattentiontowhatissaid—thewds.Wdsdoprovideuswithsomeinfmationbutmeaningsarederivedfromsomanyothersourcesthatitwouldhinderoureffectivenessasapartnertoarelationshiptorelytooh

17、eavilyonwdsalone.Wdsareusedtodescribeonlyasmallpartofthemanyideasweassociatewithanygivenmessage.Sometimeswecangaininsightintosomeofthoseassociationsifwelistenfmethanwds.Wedon’talwayssaywhatwe1.BefeDNAfingerprintingisused

18、suspects____.A.wouldhavetoleavetheirfingerprintsffurtherinvestigationsB.wouldhavetosubmitevidenceftheirinnocenceC.couldeasilyescapeconvictionofguiltD.coldbeconvictedofguiltaswell2.DNAfingerprintingcanbeunreliablewhen____

19、.A.themethodsusedfbloodcellcalculationarenotaccurateB.twodifferentindividualsofthesameethnicgroupmayhavethesameDNAfingerprintingpatternC.amatchisbychanceleftwithfingerprintsthathappentobelongtotwodifferentindividualsD.tw

20、odifferentindividualsleavetwoDNAsamples.3.TogeicistslikeLewontinHartlthecurrentmethod____.A.isnotsoconvincingastoexcludethelikelihoodthattwoDNAsamplescannevercomefromtwoindividualsB.isarguablebecausetwoindividualsofthesa

21、meethnicgrouparelikelytohavethesameDNApattern.C.IsnotbasedonadequatescientifictheyofgeicsD.Istheeticallycontradictytowhattheyhavebeenstudying4.TheattitudeoftheFederalBereauofInvestigationshowsthat____.A.enoughdataareyett

22、obecollectedfmvariousethnicgroupstoconfirmtheunlikelihoodoftwoDNAsamplescomingfromtwoindividualmembersB.enoughdataofDNAsamplesshouldbecollectedtoconfirmthatonlyDNAsamplesfmthesamepersoncanmatchC.enoughdataareyettobecolle

23、ctedfromvariousethnicgroupstodeterminethelikelihoodoftwodifferentDNAsamplescomingfmthesamepersonD.additionalsamplesfromvariousethnicgroupsshouldbecollectedtodeterminethattwoDNAsamplesareunlikelytocomefromthesameperson5.N

24、ationalAcademyofSciencesholdsthestancethat____.A.DNAtestingshouldbesystematizedB.OnlyauthizedlabatiescanconductDNAtestingC.TheacademyonlyisauthizedtowkoutstardsftestingD.TheacademyhastherighttoaccreditlabatiesfDNAtesting

25、答案：CBABB4RacketdinclamnoisewhateveryouwanttocallitunwantedsoundisAmerica’smostwidespreadnuisance.Butnoiseismethanjustanuisance.Itconstitutesarealpresentdangertopeople’shealth.Daynightathomeatwkatplaynoisecanproduceseriou

26、sphysicalpsychologicalstress.Nooneisimmunetothisstress.Thoughweseemtoadjusttonoisebyigningittheearinfactneverclosesthebodystillresponds—sometimeswithextremetensionastoastrangesoundinthenight.Theannoyancewefeelwhenfacedwi

27、thnoiseisthemostcommonoutwardsymptomofthestressbuildingupinsideus.Indeedbecauseirritabilityissoapparentlegislatshavemadepublicannoyancethebasisofmanynoiseabatementprograms.Themesubtlemeserioushealthhazardsassociatedwiths

28、tresscausedbynoisetraditionallyhavebeengivenmuchlessattention.Neverthelesswhenweareannoyedmadeirritablebynoiseweshouldconsiderthesesymptomsfairwarningthatotherthingmaybehappeningtoussomeofwhichmaybedamagingtoourhealth.Of

29、manyhealthhazardstonoisehearinglossisthemostclearlyobservablemeasurablebyhealthprofessionals.Theotherhazardsarehardertopindown.Fmanyofustheremaybeariskthatexposuretothestressofnoiseincreasessusceptibilitytodiseaseinfecti

30、on.Themesusceptibleamongusmayexperiencenoiseasacomplicatingfactinheartproblemsotherdiseases.Noisethatcausesannoyanceirritabilityinhealthpersonsmayhaveseriousconsequencesfthesealreadyillinmindbody.Noiseaffectsusthroughout

31、ourlives.Fexamplethereareindicationsofeffectsontheunbnchildwhenmothersareexposedtoindustrialenvironmentalnoise.Duringinfancychildhoodyoungstersexposedtohighnoiselevelsmayhavetroublefallingasleepobtainingnecessaryamountso

32、frest.WhythenistherenotgreateralarmaboutthesedangersPerhapsitisbecausethelinkbetweennoisemanydisabilitiesdiseaseshasnotyetbeenconclusivelydemonstrated.Perhapsitisbecausewetendtodismissannoyanceasapricetopayflivinginthemo

33、dernwld.Itmayalsobebecausewestillthinkofhearinglossasonlyanoccupationalhazard.1.InParagraph1thephrase“immuneto”areusedtomean___.A.unaffectedbyB.hurtbyC.unlikelytobeseenbyD.unknownby2.Theauth’sattitudetowardnoisewouldbest

34、bedescribedas___.A.unrealisticB.traditionalC.concernedD.hysterical3.WhichofthefollowingbeststatesthemainideaofthepassageA.Noiseisamajproblemmostpeoplerecognizeitsimptance.B.Althoughnoisecanbeannoyingitisnotamajproblem.C.