大学英语考试复习资料大学六级模拟325.docx
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大学英语考试复习资料大学六级模拟325.docx
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大学英语考试复习资料大学六级模拟325
[大学英语考试复习资料]大学六级模拟325
大学六级模拟325
PartⅠWriting
问题:
1.
Directions:
Forthispart,youareallowed30minutestowriteacompositionwiththetitleofAHarmoniousCyberspace,givinganintroductionoftheadvantagesanddisadvantagesofthecyberspace,andsomemeasurestosolvetheproblem.Youshouldwriteatleast150wordsfollowingtheoutlinegivenbelowinChinese:
答案:
AHarmoniousCyberspace
TheadventoftheInternetusheredinaneweraofinterpersonalcommunicationsandbusinessoperations.Itprovidesavehiclefornetizenstoshop,search,publishblogsandbrowseWebpages.
ArangeofproblemslurkingbehindthefrenzyofInternetimpressivelystandout.AvastmajorityofInternetusers'mailboxesaresaturatedwithjunkmails.Pornwebsiteslureagrowingnumberofyoungpeople'svisits.Falsenewsviathee-mail,BBSandchatroomincreasinglyposesathreattothesocialprosperityandstability.
Tocrackthemdown,weshouldpushforamoreeffectivelytoughlaw.Weshouldjoinourforcestolaunchanation-widecampaign,includingimposingstiffpenaltiesonspammers,shuttingdownorblockingtheunhealthysitesandintroducingareal-nameregistrationsystemtogetridoffalsemessages.Wecanfullybelievethatourcombinedeffortswillreaprewards.Acleancyberspacewillpaintourlivesmorecolorfully.
PartⅡReadingComprehension(SkimmingandScanning)
Directions:
Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.
Forquestions1--4,mark
Y(forYES)ifthestatementagreeswiththeinformationgiveninthepassage;
N(forNO)ifthestatementcontradictstheinformationgiveninthepassage;
NG(forNOTGIVEN)iftheinformationisnotgiveninthepassage.
Forquestions5--10,completethesentenceswiththeinformationgiveninthepassage.
IntelligentTransportSystem
Today,therearemanywaystotravelaroundalargemetropolitanarea,forworkorpleasure.Youcouldwalk,althoughtherangeisadmittedlylow.Youcouldbicycle,butyoustilldoalotofwork,andit'sdangerous.Youcoulddriveacar,whichtakesconcentrationandsobrietyandalicense.Youcouldrideabus,andletsomeoneelsedrive.Youcouldtakeatrain,andletacomputerdriveyou.Oryoucouldfly,andwaitalongtimefortheplanetotakeoffandland.
Allmodesoftransportationhaveadvantages,anddisadvantages.However,inrecentdecades,thesinglesystemthathaswonoverallothersistheprivateautomobile.Thisallowsyoutogofromyourstartingpointtoyourdestinationpoint,withyourcompletecontrol,atareasonablespeedinareasonabletime.Unfortunately,apartfromthepollutantscreatedbythevehicleitself,thefactthatsomanyotherpeopleseemtoenjoyitsperceivedfreedomcausesmajortrafficjams,andtherequirementfortrafficcontroldevices.
Toomanypeopleusingtoolittleroadspaceatthesametimecausestrafficjams.Itismostprofoundonlargegradeseparatedroads,thathavelimitedaccess.Therehavebeenvarioussolutionstriedout,includinghighoccupancyvehiclelanes,rampmetering,orroadwidening.Unfortunately,theysimplydon'tsolvetheproblemoflackofcapacity.
Trafficcontroldevicesimposecertaincontrolsontheflowoftraffic.Mostcommonaretrafficlights.Thesemetertheflowoftrafficbetweentwoormoreroadssothatatnotimeisanyvehicleinconflictwithanyother.However,theyalsoimposethattrafficcomestoacompletestop,requiringvehiclestostopandthenstartagain.Thisnotonlyslowsvehiclesdown,butalsoistheprimecauseofwastedenergyinurbansettings.
Unfortunately,citiesareveryreluctanttospendmoney.Thereforeanyfuturetransportsystemhastobecheapforcities.Thisimpliesthatcurrentinfrastructureiskeptasmuchaspossible,orimproved.Usingroads,theprimeinfrastructureavailabletodaywouldmeantheformfactorforvehicleswouldstaythesame,buteachindividualvehiclecouldbemademoreintelligent.
Sofortomorrow,weneedtodesignatransportsystemthatusesroadsoraveryslightimprovementonroadstoprovideahighcapacitysystemthatprovidesserviceforeveryone.Thiscouldbeachievedbyimplementingthefollowingeightsystems,eachofwhichprovidesmoreofaburdenonthecarmanufacturer,butwouldeventuallyprovideasystem,whichisautomatic,safeandefficient.
Firstly,allcarsshouldhaveintelligencebrakesandcruisecontrol.Thesewouldremovethedriverfromtheresponsibilityofhavingtofollowalongbehindsomebody.Bypressingabutton,thedriverwouldgivecontrolofthedistancebetweenhiscarandthecarinfront.Ifthecarinfrontsloweddown,youwouldnothavetowaitforthebrakelightstolightup,thedrivertoseethem,Wenpressthebrakepedaltherightamount,andcontinuouslymonitorthedistance.Insteadthecarwouldbeprogrammedtocontinuouslymonitorthedistancetothecarinfrontandinstantlyalteritsspeedtomatchandmaintainthedistance.
Byspeedingupthefeedbackcircuit,youcanclosethedistanceofcars,andthereforeincreasethecapacity.Youalsoremovedrivererrorsoreducingthenumberofaccidents.Also,carscouldcommunicatelocallywitheachotherandwareaheadoftimethatfollowingcarsneedtoslowdown.
Next,youneedtoremovethedriverfromtheresponsibilityofsteeringthevehicle.Havingcomplexvisionsystemsonacarseemsoverthetopastheynotonlydramaticallyincreasethecostofthecar,butalsothecomplexityofthecontrolsoftware.Insteadyoucouldbuilddetectorintothefrontofthecarthatdetectthemiddleofalaneoftraffic.Thecarwouldtryandkeepthevehicleinthatlane.Junctionscouldbebuiltbyhavingthecenterlinesplit.Theoperatororrouteplanningsoftwarewoulddecidewhichofthetwoormoresignalstofollow.
Separatinglanesofautomaticcarsfromthosedrivenbyhumansespeciallyonhighspeedhighways,wouldgiveanincentivetonotonlypurchaseanautomaticcarbutalsotopurchasetheroadspacewhichituses.Sincetheseseparatelaneswouldhavenotonlyfastmovingtrafficbutalsosafertraffic,theycouldbemarkedandsoldbycitiestocreatearevenuestreamtoallowthebuildingofmoreaugmentedroads.
Havingadeviceinthecarthatdoesrouteplanningisagreathelpforpeoplewhodon'tknowthewayaroundyourcity.Butwhatifyoulivedinthecityformanyyears?
It'snotgoingtobethatmuchuse,isit?
Bylinkingrouteplanningwithrealtimeinformationontrafficlevelsinthecity,youcanquicklydivertyourjourneytousethemostefficientroads.Thisinformationcouldberelayedtovehiclesusingbroadcastradio.Roadsidesensorsthatdeterminetheflowoftrafficonaroadwoulddetectthespeeds.
Theabilitytoremovetheparkingrequirementsfromnearabuildingwouldallowmorecompactcities,whicharebetterpedestrianenvironments.However,peopledon'tliketowalkfromaparkingstructurethatisalongwayfromtheirdestination.Thesolutionistoallowthecartodropoffthepassengerswhererequiredandthendriveitselftothenearestparkingstructurethatisknowntohaveaspace.
Byautomaticallycontrollingthespeedandlocationofalltraffic,youcan'makejunctionsworkveryefficiently.Atthemoment,sometraffichastostop,andwhenitresumes,thecarsspreadoutintoalargedispersevolume.Insteadyoucouldmoveeachgroupofcarsasapacket,adjustingitsspeedsothatitarrivesatanintersectionatjusttherighttimesothatitneverhastostop.Thiscouldbeachievedbychangingthespeedofasectionofroadsothosecarsslowdowngradually.Thespeedsofroadsegmentswouldbesetbynearbyjunctioncomputerseachlinkedtotheother.Thiswouldcreateaholistictrafficcontrolsystem.Ifonesectionlostpower,thesystemwouldreverttoanormaljunction.
Whenagroupofpeoplemovefromonelocationtoanother,itwouldmakesensetoallowthemtotraveltogetherinsteadofhavingtoeachuseaseparatevehicle.Ondemandgrouptransportwouldallowtherequestofalargevehiclewhichcanautomaticallymovepeoplefromonelocationtoanother.Thesevehicleswouldbestoredatstrategiclocations,andthensenttotherequestingsiteasquicklyaspossible.Vehiclescouldbebookedinadvance,andyoupaybythetimeusedinminutes,notthedistancetraveledordestination.
Attheotherendisthereplacementofthetaxi.Thiswouldbesimilartothegrouptransportbutforsmallergroups.Againthesevehicleswouldbestoredatstrategiclocations,sothatpeopledon'thavetowaitverylong.Againtheyarehiredbytheminuteofuse.Sinceyouarenolongerrequiredtoownyourownvehicle,thetotalnumberofvehiclesrequiredinthewholesystemisreduced,andthereforethenumberofparkingspacesrequired.Givenafullydemanddriventransportsystem,youwouldneverneedtofindanotherparkingspaceinyourlife.
Aftertheaboveisimplemented,youhaveondemandprivateorgrouptransportvehiclesdrivingthemselvesfrompointtopointwithouttheneedtostopatjunctions,waitfortrafficjamsonfreeways,orgetlostalongtheway.
1.Ridingabicycletakesconcentration,sobrietyandalicense.
答案:
N[解析]文章第一段中提到开汽车需要集中精神,清醒冷静,还需要有驾照,而不是指骑自行车。
2.Privateautomobileisthemostimportantmodeoftransportationinrecentdecades.
答案:
Y[解析]文章第二段中提到近几十年中私家车是超越其他所有形式的交通工具,也就是最重要的。
3.Airpollutionisthemostseriousproblemcausedbytheexistoftoomanyprivateautomobiles.
答案:
NG[解析]文中没有提到相关内容。
4.Trafficlightsarethemostcommontrafficcontroldevices.
答案:
Y[解析]文章第四段中提到交通指示灯是最常见的交通控制装置。
5.Driverscanbefreefromtheresponsibilityofhavingtofollow
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