




版權(quán)說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請進(jìn)行舉報(bào)或認(rèn)領(lǐng)
文檔簡介
2022-2023年河北省邯鄲市公共英語五級(筆試)真題一卷(含答案)學(xué)校:________班級:________姓名:________考號:________
一、1.ListeningComprehension(15題)1.Howmanyreactionscouldyouhavetowardstheteacher'sreport?
2.WhatdoesDr.Hubercomparetheuniverseto?
3.WhatkindofgraindidmostEuropeanseat500yearsago?
4.PartA
Directions:Youwillhearatalk.Asyoulisten,answerQuestions1-10bycirclingTRUEorFALSE.YouwillhearthetalkONLYONCE.Younowhave1minutetoreadQuestions1-10.
聽力原文:Goodmorning!
Um…AsManagingDirectorofourcompanyI'vebeenaskedtosayafewwordstoyoutodayaboutthewaythecompanyisorganized.SowhatI'vedoneistomakeasortoftable…youknow…toshowhowitisallarranged.It'sinyourbooks.Canyoufindit?
OK.Now,notallcompaniesareorganizedinthesameway,ofcourse.Theyallhavemoreorlessthesamebitsandpieces.buttheyputthemtogetherindifferentways.Infact,someManagingDirectorsarealwayschangingtheorganization,whichcanbeverydisturbingforeverybodyelseandsometimescausesawfulhold-ups.Sometimesit'snecessary,ofcourse.likewhenyoustartmakingsomethingdifferentorjoinupwithanothercompanyorsomething.Anyway,Ithinktheorganizationofmycompanyisfairlytypical,solet'stakealookathowwehaveorganizedit.
Atthetopofthescheme,aboveme,istheBoardofDirectors.Theirjobistoadministratethecompany,makegeneralpolicies,andsoon.Therearetwokindsofdirectors.a(chǎn)ctually.Onekindiswhatwecallnon-executivedirectors,whichmeansthattheyarenotfull-timeemployees.Theyarethesortofpeoplewhohavesomestandinginvariouspartsofthebusinessworldandareinapositiontohelpthecompanytosucceed.TheyonlyappearwhentherearemeetingsoftheBoard,andsomeofthemareontheboardsofothercompaniesatthesametime.Butthesecondlotofdirectors-theexecutivedirectors-arefull-timeemployeesofthecompany.Mostofthemaremanagersofourvariousdepartments.a(chǎn)ndyou'llbemeetingthemlater.
Theabsoluteheadofthecompany,ofcourse.istheChairmanoftheBoard.HeisappointedbytheBoard,andhisjobistotakethechairatmeetingsoftheshareholdersandtheBoardofDirectors,andtorepresentthecompany'sinterestsatoutsidefunctions.Hedoesnottakemuchpartintherunningofthebusiness.Heleavesmetogetonwiththejob.Mindyou,notallchairmenarelikethat.Ourlastonewasarealpain.a(chǎn)lwayswantedeverythingdonehisownwayandhekeptoninterfering…butanyway,that'swhatthetopslotintheschemeisfor.
Thenthere'sme,theManagingDirector,orMDforshort-aslongasyoudon'tthinkI'madoctorofmedicine,haha…Um…Now,myjobistocoordinatethepoliciesdecidedbythedirectorsandseethattheyarecarriedout.Idothisthroughthevariousmanagersofdepartments-departmentalmanagers.AtthemomentI'vegotsix.a(chǎn)ndthereareslotsforthemalongthelineunderneathmeinyourscheme.Idon'tthinktheyareinanyparticularorder,sowe'llstartfromtheleftandwalkacross.Actually.they'reallgoingtocomeandtellyouabouttheirjobs.SoI'lljustsayafewwords.And…
Right.Thefirstoneis…
Thespeechismainlyabouttheorganizationofthecompany.
A.RightB.Wrong
5.StudyinginanEnglish-speakingcountryisaveryeffectivewaytolearnEnglish.
A.TrueB.Fasle
6.Studentscanenjoyasimplebookingandenrolmentprocedureinsomechains.
A.TrueB.Fasle
7.HowlongdidthejourneytakefromEnglandtoIndiaintheolddays?
8.PaulcouldreachalltheswitchesbecausetheyWereoriginallyinstalledattherightheightofhim.
A.RightB.Wrong
9.Whobenefitsmostfrominflation?
A.Personswhohavesalariesaccordingtolong-termcontracts.
B.Personswhoownbusinesses.
C.Personswithold-agepensions.
D.Personswithslow-risingincomes.
10.Whataretheshoppinggoodsthatarebasicallyconsideredthesame?
A.Thosethatsatisfysimilarneedsoftheconsumer.
B.Thosethatconsumersdon'tcarewheretobuy.
C.Thosethatconsumersspendmuchtimelookingfor.
D.Thosethatcanbefoundeverywhere.
11.MrMillerenjoysdoingthingswithhisownhands.
A.RightB.Wrong
12.Chainsdon'tproducetheirowncoursebookmaterial.
A.TrueB.Fasle
13.Wherewastheinterviewconducted?
14.Whodonotprobablynoticethebeautyoftheoreticalphysics?
15.Ifaconsumerwantsaquicksettlementoftheproblem,whomisitbettertocomplainto?
A.Ashopassistant.
B.Thestoremanager.
C.Themanufacturer.
D.Apublicorganization.
二、2.UseofEnglish(10題)16.(32)
17.
【C15】
18.
【C11】
19.(36)
20.(35)
21.(34)
22.(46)
23.
【C18】
24.(48)
25.(38)
三、3.ReadingComprehension(15題)26.PartB
Directions:Inthefollowingarticlesomeparagraphshavebeenremoved.ForQuestions66-70,choosethemostsuitableparagraphfromthelistA-Ftofitintoeachofthenumberedgaps.Thereisoneparagraphwhichdoesnotfitinanyofthegaps.MarkyouranswersonANSWERSHEET1.
Inthefollowingarticlesomeparagraphshavebeenremoved.ForQuestions66~70,choosethemostsuitableparagraphfromthelistA~Ftofitintoeachofthenumberedgaps.Thereisoneparagraphwhichdoesnotfitinanyofthegaps.MarkyouranswersonANSWERSHEET1.
Fromhervantagepointshewatchedthemaindoorsswingopenandthefirstarrivalspourin.Thosewhohadbeenattheheadofthelinepausedmomentarilyonentry,lookedaroundcuriously,thenquicklymovedforwardasothersbehindpressedin.Withinmomentsthecentralpublicareaofthebigbranchbankwasfilledwithachattering,noisycrowd.Thebuilding,relativelyquietlessthanaminuteearlier,hadbecomeaBabel.Edwinasawatallheavysetblackmanwavesomedollarbillsandannounceloudly,"Iwanttoputmymoneyinthebank."
66.______
Itseemedasifthereportabouteveryonehavingcometoopenanaccounthadbeenaccurateafterall.
Edwinacouldseethebigmanleaningbackexpansively,stillholdinghisdollarbills.Hisvoicecutacrossthenoiseofotherconversationsandsheheardhimproclaim,"I'minnohurry.There'ssomethingI'dlikeyoutoexplain."
Twootherdeskswerequicklymannedbyotherclerks.Withequalspeed,longwidelinesofpeopleformedinfrontofthem.
Normally,threemembersofstaffwereampletohandlenewaccountbusiness,butobviouslyinadequatenow.EdwinacouldseeTottenhoeonthefarsideofthebankandcalledhimontheintercom.Sheinstructed,"Usemoredesksfornewaccountsandtakeallthestaffyoucansparetomanthem."
67.______
Tottenhoegrumbledinreply,"Yourealizewecan'tpossiblyprocessallthesepeopletoday,andhowevermanywedowilltieusupcompletely."
"I'vegotanidea,"Edwinasaid,"that'swhatsomeonehasinmind.Justhurrytheprocessingallyoucan."
68.______
First,anapplicationform.calledfordetailsofresidence,employment,socialsecurity,andfamilymatters.Aspecimensignaturewasobtained.Thenproofofidentitywasneeded.Afterthat,thenewaccountsclerkwouldtakealldocumentstoanofficerofthebankforapprovalandinitialing.Finally,asavingspassbookwasmadeoutoratemporarycheckbookissued.
Thereforethemostnewaccountsthatanybankemployeecouldopeninanhourwerefive,sothethreeclerkspresentlyworkingmighthandleasumofninetyinonebusinessday,iftheykeptgoingattopspeed,whichwasunlikely.
69.______
Stillthenoisewithinthebankincreased.Ithadbecomeanuproar.
Afurtherproblemwasthatthegrowingmassofarrivalsinthecentralpublicareaofthebankwaspreventingaccesstotellers'countersbyothercustomers.Edwinacouldseeafewofthemoutside,regardingthemillingscenewithconsternation.Whileshewatched,severalgaveupandwalkedaway.
Insidethebanksomeofthenewcomerswereengagingtellersinconversationandthetellers,havingnothingelsetodobecauseofthemelee,chattedback.Twoassistantmanagershadgonetothecentralfloorareaandweretryingtoconductthefloodofpeoplesoastoclearsomespaceatcounters.Theywerehavingsmallsuccess.
70.______
Shedecideditwastimeforherownintervention.
Edwinalefttheplatform.andafailed-offstaffareaand,withdifficulty,madeherwaythroughthemillingcrowdtothemainfrontdoor.
A.Yetsheknewhowevermuchtheyhurrieditwouldstilltaketentofifteenminutestoopenanysinglenewaccount.Italwaysdid.Thepaperwo
27.PartB
Directions:Inthefollowingarticlesomeparagraphshavebeenremoved.ForQuestions66-70,choosethemostsuitableparagraphfromthelistA-Ftofitintoeachofthenumberedgaps.Thereisoneparagraphwhichdoesnotfitinanyofthegaps.MarkyouranswersonANSWERSHEET1.
Inthefollowingarticlesomeparagraphshavebeenremoved.ForQuestions66~70,choosethemostsuitableparagraphfromthelistA~Ftofitintoeachofthenumberedgaps.Thereisoneparagraphwhichdoesnotfitinanyofthegaps.MarkyouranswersonANSWERSHEET1.
Thepressisconstantlyremindingusthatthedramaticincreaseintheageofourpopulationoverthenext30orsoyearswillcausenationalhealthcaresystemstocollapse,economiestocrumpleunderthestrainofpensiondemandsanddisintegratingfamiliestobuckleunderincreasingcarecommitments.YetresearchatOxfordisbeginningtoexposesomeofthewidespreadmythsthatunderliethisrhetoric.Demographicageingisundoubtedlyareality.Lifeexpectancyindevelopedcountrieshasrisencontinuouslyoverthepastcentury,increasingthepercentageofthoseovertheageof60relativetothoseundertheageof15.By2030halfthepopulationofWesternEuropewillbeovertheageof50,withapredictedaveragelifeexpectancyofafurther40years.Bythen,aquarterofthepopulationwillbeover65andby2050theUK'scurrentnumberof10,000centenariansarepredictedtohavereachedaquarterofamillion.SomedemographershaveevensuggestedthathalfofallbabygirlsbornintheWesttodaywilllivetoseethenextcentury.
66.______
Indeed,ifthiscouldbeachievedthroughouttheworld,itwouldsurelycountasthesuccessofcivilization,forthenwewouldalsohaveconqueredthekillersofpoverty,disease,famineandwar.
Decreasingmortalityrates,increasinglongevityanddecliningfertilitymeansmallerpercentagesofyoungpeoplewithinpopulations.Overthepast20yearslifeexpectancyatbirthintheUKhasrisenbyfouryearsformen(to75)andthreeyearsforwomen(to80).MeanwhilefertilityratesacrossEuropehavedeclinedmoreorlesscontinuouslyoverthepast40yearsandremainwellbelowthelevelsrequiredforEuropeanpopulationstobeabletoreplacethemselveswithoutsubstantiveimmigration.Butagain,ratherthanseeingthisasadoomandgloomscenario,weneedtoexplorethepositiveaspectsofthesedemographics.Thenext50yearsshouldprovideuswithanopportunitytoenjoythemanyadvantagesofasocietywithamaturepopulationstructure.67.______
ThefirstoftheseisthecurrentpoliticalrhetoricwhichclaimsthathealthservicesacrosstheWesternworldarecollapsingunderthestrainofdemographicageing.
68.______
Thesecondmythistheviewthattheratioofworkerstonon-workerswillbecomesoacutethatWesterneconomieswillcollapse,compoundedbyamassivegrowthinpensiondebt.Whilethereareundoubtedconcernsovercurrentpensionshortfalls,itisaisoclearthatworkingliveswillthemselveschangeoverthenextfewdecades,withapredictedincreaseinflexibleandpart-timeworkandtheprobableextensionofworkinglifeuntiltheageof70.Indeed,wehavetorecognizethatwecannotexpecttoretireattheageof50andthenbeabletosupportourselvesforanother40orsoyears.Neitherasolidpensionschemenorsavingscancarrypeoplethatlong.
69.______
Afurthermythisthatwewillallliveinloose,multigenerationalfamilies,experiencingincreasedemotionaldistancingfromourkin.Evidencefromavarietyofstudiesacrossthedevelopedworldsuggeststhat,ifanything,themodemfamilyisactuallybecomingmoreclose-knit.WorkcardedoutbytheOxfordInstituteinScandinaviaandinaPan-EuropeanFamilyCareStudy,forexample,showsthatdespitetheinfluenceofth
28.
Whycanmanypeoplesee"silverlinings"totheeconomicshowdown?
A.Theywouldbenefitincertainways.
B.Thestockmarketshowssignsofrecovery.
C.Suchaslowdownusuallyprecedesaboom.
D.Thepurchasingpowerwouldbeenhanced.
29.
Whatcanbeconcludedaccordingtotheauthor'sviewofthe"obesitygenes"?
A.Peoplewithageneticinclinationtogainweightcanslim.
B.Peoplewhoarebornfatwillremainthatwayalllife.
C.Alleffortstoloseweightwillprovefruitless.
D.Fatpeoplecanliveaveryhappylife,too.
30.
WhichofthestatementsabouttheteensisNOTtrue?
A.Theyareill-bredstudentsinschool.
B.Someofthemtake"realdrugs".
C.Teensneedsattention.
D.Afewcasuallydisplayscarsontheirarms.
31.(77)
32.
Whichofthefollowingstatementsistrue?
A.Americans'caloricintakehasdroppedoverthelastfewdecades.
B.Manypeoplewhotrytoloseweightgiveuphalfway.
C.Americansarealwaysawareofhowmuchtheyeat.
D.Obesitydoesnoharmtopeople'shealth.
33.
Theeffectsofalmostuniversalemploymentwereoverwhelminginthat_______.
A.thehouseholdandvillagecommunitydisappearedcompletely
B.mennowtravelledenormousdistancestotheirplacesofwork
C.youngandoldpeoplebecamesuperfluouscomponentsofsociety
D.theworkstatusofthosenotinpaidemploymentsuffered
34.
FromDr.Dustan'sstudywecaninferthat_____.
A.alow-saltdietmaybeprescribedforsomepeople
B.theamountofsaltintakehasnothingtodowithone'sbloodpressure
C.thereductionofsaltintakecancureahypertensivepatient
D.anextremelylow-saltdietmakesnodifferencetoanyone
35.PartC
Directions:Answerquestions71-80byreferringtothefollowinggames.
Note:AnswereachquestionbychoosingA,BorCandmarkitonANSWERSHEET1.Somechoicesmayberequiredmorethanonce.
Answerquestions71~80byreferringtothefollowinggames.
Note:AnswereachquestionbychoosingA,B,CorD.Somechoicesmayberequiredmorethanonce.
A=HydropowerB=NuclearpowerC=SolarpowerD=Windpower
Whichpower(power's)…
A
Hydropower
Introduction
Wehaveusedrunningwaterasanenergysourceforthousandsofyears,mainlytogrindcom.
ThefirsthouseintheworldtobelitbyhydroelectricitywasCragsideHouse,inNorthumberland,England,in1878.In1882ontheFoxRiver,intheUSA,hydroelectricityproducedenoughpowertolighttwopapermillsandahouse.
Nowadaystherearemanyhydro-electricpowerstations,providingaround20%oftheworld'selectricity.Thenamecomesfrom“hydro”,theGreekwordforwater.
Howitworks
Adamisbuilttotrapwater,usuallyinavalleywherethereisanexistinglake.
Waterisallowedtoflowthroughtunnelsinthedam,toturnturbinesandthusdrivegenerators.
Advantages
Oncethedamisbuilt,theenergyisvirtuallyfree.
Nowasteorpollutionproduced.
Muchmorereliablethanwind,solarorwavepower.
Watercanbestoredabovethedamreadytocopewithpeaksindemand.
Hydro-electricpowerstationscanincreasetofullpowerveryquickly,unlikeotherpowerstations.
Disadvantages
Thedamsareveryexpensivetobuild.
Buildingalargedamwillfloodaverylargeareaupstream,causingproblemsforanimalsthatusedtolivethere.
Findingasuitablesitecanbedifficult--theimpactonresidentsandtheenvironmentmaybeunacceptable.
Waterqualityandquantitydownstreamcanbeaffected,whichcanhaveanimpactonplantlife.
Isitrenewable?
Hydro-electricpowerisrenewable.
TheSunprovidesthewaterbyevaporationfromthesea,andwillkeepondoingso.
B
Nuclearpower
Introduction
NuclearpowerisgeneratedusingUranium,whichisametalminedinvariouspartsoftheworld.
Thefirstlarge-scalenuclearpowerstationopenedatCalderHallinCambria,England,in1956.
Somemilitaryshipsandsubmarineshavenuclearpowerplantsforengines.
Howitworks
Nuclearpowerstationsworkinprettymuchthesamewayasfossilfuel-burningstations,exceptthata“chainreaction”insideanuclearreactormakestheheatinstead.
ThereactorusesUraniumrodsasfuel,andtheheatisgeneratedbynuclearfission.Neutronssmashintothenucleusoftheuraniumatoms,whichsplitroughlyinhalfandreleaseenergyintheform.ofheat.
Carbondioxidegasispumpedthroughthereactortotaketheheataway,andthehotgasthenheatswatertomakesteam.
Advantages
Nuclearpowercostsaboutthesameascoal,soit'snotexpensivetomake.
Doesnotproducesmokeorcarbondioxide,soitdoesnotcontributetothegreenhouseeffect.
Produceshugeamountsofenergyfromsmallamountsoffuel.
Producessmallamountsofwaste.
Disadvantages
Althoughnotmuchwasteisproduced,itisvery,verydangerous.
Itmustbesealedupandburiedformanyyearstoallowtheradioactivitytodieaway.
Nuclearpowerisreliable,butalotofmoneyhastobespentonsafety.
Isitrenewable?
Nuclearenergyfrom
36.Defendersofspecialprotectivelaborlegislationforwomenoftenmaintainthateliminatingsuchlawswoulddestroythefruitsofacentury-longstrugglefortheprotectionofwomenworkers.Evenabriefexaminationofthehistoricpracticeofcourtsandemployerswouldshowthatthefruitofsuchlawshasbeenbitter;theyare,inpractice,moreofacursethanablessing.
Sex-definedprotectivelawshaveoftenbeenbasedonstereotypicalassumptionsconcerningwomen'sneedsandabilities,andemployershavefrequentlyusedthemaslegalexcusesfordiscriminatingagainstwomen.AftertheSecondWorldWar,forexample,businessesandgovernmentsoughttopersuadewomentovacatejobsinfactories,thusmakingroominthelaborforceforreturningveterans.Therevivalorpassageofstatelawslimitingthedailyorweeklyworkhoursofwomenconvenientlyaccomplishedthis.Employershadonlytodeclarethatovertimehourswereanecessaryconditionofemploymentorpromotionintheirfactory,andwomencouldbequitelegallyfired,refusedjobs,orkeptatlowwagelevels,allinthenameof"protecting"theirhealth.Byvalidatingsuchlawswhentheyarechallengedbylawsuits,thecourtshavecolludedovertheyearsinestablishingdifferent,lessadvantageousemploymenttermsforwomenthanformen,thusreducingwomen'scompetitivenessonthejobmarket.Atthesametime,eventhemostwell-intentionedlawmakers,courts,andemployershaveoftenbeenblindtotherealneedsofwomen.Thelawmakersandthecourtscontinuetopermitemployerstoofferemployeehealthinsuranceplansthatcoverallknownhumanmedicaldisabilitiesexceptthoserelatingtopregnancyandchildbirth.
Finally,laborlawsprotectingonlyspecialgroupsareoftenineffectiveatprotectingtheworkerswhoareactuallyintheworkplace.Somechemicals,forexample,posereproductiverisksforwomenofchildbearingyears;manufacturersusingthechemicalscomplywithlawsprotectingwomenagainstthesehazardsbyrefusingtohirethem.Thusthesex-definedlegislationprotectsthehypotheticalfemaleworker,buthasnoeffectwhateveronthesafetyofanyactualemployee.Thehealthriskstomaleemployeesinsuchindustriescannotbenegligible,sincechemicalstoxicenoughtocausebirthdefectsinfetusesorsterilityinwomenarepresumablyharmfultothehumanmetabolism.Protectivelawsaimedatchangingproductionmaterialsortechniquesinordertoreducesuchhazardswouldbenefitallemployeeswithoutdiscriminatingagainstany.
Insum,protectivelaborlawsforwomenarediscriminatoryanddonotmeettheirintendedpurpose.Legislatorsshouldrecognizethatwomenareintheworkforcetostay,andthattheirneeds—goodhealthcare,adecentwage,andasafeworkplace—aretheneedsofallworkers.Lawsthatignorethesefactsviolatewomen'srightsforequalprotectioninemployment.
Accordingtotheauthor,whichofthefollowingresultedfromthepassageorrevivalofstatelawslimitingtheworkhoursofwomenworkers?
A.Womenworkerswerecompelledtoleavetheirjobsinfactories.
B.Manyemployershaddifficultyinprovidingjobsforreturningveterans.
C.Manyemployersfoundithardtoattractwomenworkers.
D.Thehealthofmostwomenfactoryworkersimproved.
37.(80)
38.PaulStraussmann,retiredvicepresidentofXerox,,indicatesinhisbookInformationPay-offthat"almosthalfoftheU.S.informationworkersareinexecutive,managerial,administrativeandprofessionalpositions."Hefurtherstatesthat"managersandprofessionalsspendmorethanhalfoftheirtimeincommunicatingwitheachother."
Inotherwords,peopleareacorporation'smostexpensiveresource.Foratypicaloffice,over90percentoftheoperatingbudgetisforsalaries,benefitsandoverhead.Withthisinvestment,isitanywonderthatmanagersarefocusingmoreandmoreattentiononemployeeproductivity?Theyrealizethatthepaperjunglecannotbetamedsimplybyhiringmorepeople.Toreceiveareturnontheirinvestment,wisecorporateexecutiveofficersarerealizingwhatindustrialistsandagriculturistslearnedlongago--efficienttoolsareessentialforincreasedproductivity.
Adirectrelationshipexistsbetweenefficientflowofinformationandthequalityandspeedoftheoutputoftheendproduct.Forthosecompaniesusingtechnology,theperdocumentcostofinformationprocessingisonlyafractionofwhatitwasafewyearsago.Thedecreasingcostofcomputersandperipherals(equipmenttiedtothecomputer)willcontinuetomaketechnologyacost-effectivetoolinthefuture.AnexampleofthistypeofsavingisillustratedinthecaseoftheWesternDivisionofGeneralTelephoneandElectronicsCompany(GTE).Bymakingaone-timeinvestmentof$10milliontoautomateitsfacilities,managementestimatesanannualsavingof$8.5millionforthecompany.Thissavingsisgainedmainlythroughtheeliminationofsupportpeopleonceneededforproposalprojects.Throughatelecommunicationsnetworkthatsupports150computerterminalswithgoodgraphicscapabilities,theengineerswhoconceptualizetheprojectsarenowdirectparticipants.Theyusethegraphicscapacitiesofthecomputerratherthanrelyondrafterstopreparedrawings,theyentertheirowntextratherthanemploytypists,andtheyusethenetworktotrackprojectprogressratherthanconductingmeetings.
Inthefirstparagraph,theauthorquotesStraussmann'swordsinordertomakeclear
A.theimportanceofcommunicativecapabilityinbusiness
B.theneedforpeopleofhigherpositionsinacompany
C.theimportanceofassigningpeopletoproperpositions
D.thenecessityforpeopleinhigherpositionstoknowinformationscience
39.
Thearticleconcludesthat______.
A.thecreationofjobsforallisanimpossibility
B.oureffortsandresourcesintermsoftacklingunemploymentareinsufficient
C.peopleshouldbeginsupportingthemselvesbylearningapracticalskill
D.weshouldhelpthosewhosejobsareonlypart-time
40.Theideaofafishbeingabletoproduceelectricitystrongenoughtolightlampbulbs-oreventorunasmallelectricmotor—isalmostunbelievable,butseveralkindsoffishareabletodothis.Evenmorestrangely,thiscuriouspowerhasbeenacquiredindifferentwaysbyfishbelongingtoverydifferentfamilies.
Perhapsthemostknownaretheelectricrays,ortorpedoes,ofwhichseveralkindsliveinwarmseas.Theypossessoneachsideofthehead,behindtheeyes,alargeorganconsistingofanumberofhexagonal-shapedcellsratherlikeahoneycomb.Theceilsarefilledwithajelly-likesubstance,andcontainaseriesofflatelectricplates.Oneside,thenegativeside,ofeachplate,issuppliedwithveryfinenerves,connectedwithamainnervecomingfromaspecialpartofthebrain.Currentgetsthroughfromtheupper,positivesideoftheorgandownwardtothenegative,lowerside.Generallyitisnecessarytotouchthefishintwoplaces,completingthecircuit,inordertoreceiveashock.
Thestrengthofthisshockdependsonthesizeoffish,butnewly-bornonesonlyabout5centimetersacrosscanbemadetolightthebulbofapocketflashlightforafewmoments,whileafullygrowntorpedogivesashockcapableofknockingamandown,and,ifsuitablewiresareconnected,willoperateasmallelectricmotorforseveralminutes.
Anotherfamousexampleistheelectriceel.Thisfishgivesanevenmorepowerfulshock.Thesystemisdifferentfromthatofthetorpedointhattheelectricplatesrunlongitudinallyandaresuppliedwithnervesfromthespinalcord.Consequently,thecurrentpassesalongthefishfromheadtotail.Theelectricorgansofthesefisharereallyalteredmusclesandlikeallmusclesareapttotire,sotheyarenotabletogenerateelectricityforverylong.PeopleinsomepartsofSouthAmericawhovaluetheelectriceelasfood,takeadvantageofthisfactbydrivinghorsesintothewateragainstwhichthefishdischargetheirelectricity.Thehorsesarelessaffectedthanamanwouldbe,andwhentheelectriceelshaveexhaustedthemselves,theycanbecaughtwithoutdanger.
TheelectriccatfishoftheNileandofotherAfricanfreshwatershasadifferentsystemagainbywhichcurrentpassesoverthewholebodyfromthetailtothehead.Theshockgivenbythisarrangementisnotsostrongastheothertwo,butisnonethelessunpleasant.Theelectriccatfishisaslow,lazyfish,fondofgloomyplacesandgrowstoabout1metrelong;itiseatenbytheArabsinsomeareas.
Thepowerofproducingelectricitymayservethesefishbothfordefenceandattack.Ifalargeenemyattacks,theshockwilldriveitaway;butitappearsthatthecatfishandtheelectriceelusetheircurrentmostoftenagainstsmallerfish,stunningthemsothattheycaneasilybeoverpowered.
Whichofthefollowingcanproducethestrongestshock?
A.Theelectriceel.
B.Theelectriccatfish.
C.Thenewly-bornelectrictorpedoes.
D.Thefully-grownelectricray.
四、閱讀理解(5題)41.
第
49
題
TheGTE’sexampleshowsthat__________.
42.
根據(jù)下列選項(xiàng)回答21~30題:
第
21
題
istheheadquarteroftheSupremeCourt?__________
43.
第
29
題
4._________
44.
第
37
題
isagoodmethodofsupplyingenergytoremoteareas?__________
45.
第
49
題
hasthebestenginedesignintermsofsayingmoney?_________
參考答案
1.One
2.Apuzzle
3.Wheat
4.A
5.A
6.A
7
溫馨提示
- 1. 本站所有資源如無特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
- 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
- 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽,若沒有圖紙預(yù)覽就沒有圖紙。
- 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
- 5. 人人文庫網(wǎng)僅提供信息存儲空間,僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對任何下載內(nèi)容負(fù)責(zé)。
- 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請與我們聯(lián)系,我們立即糾正。
- 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。
最新文檔
- 市政道路占道施工方案
- 2025至2030年中國不銹鋼寵物指甲剪數(shù)據(jù)監(jiān)測研究報(bào)告
- 2025年中國陸地式電泵吸污機(jī)市場調(diào)查研究報(bào)告
- 2025年中國芪風(fēng)固表顆粒劑市場調(diào)查研究報(bào)告
- 張家口二層輕鋼房施工方案
- 景觀膜結(jié)構(gòu)運(yùn)動場施工方案
- 2025年中國不銹鋼薄壁容器市場調(diào)查研究報(bào)告
- 全國河大版(三起)小學(xué)信息技術(shù)第三冊第1單元第1課《珍藏童年的回憶-文字輸入和格式設(shè)置》教學(xué)設(shè)計(jì)
- 小學(xué)信息技術(shù)六年級下冊《 第1課 移動鼠標(biāo)接蘋果》教學(xué)設(shè)計(jì)
- 2024-2025學(xué)年高中語文第三單元因聲求氣吟詠詩韻第15課蘇幕遮課后課時(shí)作業(yè)含解析新人教版選修中國古代詩歌散文欣賞
- 精選裝飾工程室內(nèi)拆除專項(xiàng)施工方案
- 《交通工程CAD》課程教學(xué)大綱(本科)
- 人教版數(shù)學(xué)五年級下冊 全冊各單元教材解析
- 2022年二年級生命安全教育教案
- 換班申請表(標(biāo)準(zhǔn)模版)
- 豐田汽車戰(zhàn)略規(guī)劃與戰(zhàn)略管理體系研究(2021)
- 公共政策學(xué)(第三版)-課件
- 文物保護(hù)項(xiàng)目可行性研究報(bào)告
- 冷卻塔是利用水和空氣的接觸
- 者陰村戰(zhàn)友紀(jì)念者陰山對越自衛(wèi)還擊作戰(zhàn)30周年聯(lián)誼會計(jì)劃2
- 我國古代職業(yè)教育的發(fā)展
評論
0/150
提交評論