电子信息工程专业英语教程（第5版） 试卷与答案 试卷B

PAGEPagePAGE1ofNUMPAGES4TechnicalEnglishTestforElectronicInformationEngineeringDepartment____________Class___________Name____________Section123TotalScoreSECTION1Fillintheblankswithproperterms(30minutes).1时序图6基站2动态范围7截止频率3边缘检测8载波4探头9实时系统5脉冲宽度10像素11ADC16CCD12DSP17PDA13OS18AFG14DCT19CRT15LED20UUTSECTION2TranslatethefollowingpassagesintoChinese(40minutes).WhiletraditionalprocessorsfollowtheVonNeumannarchitecturemodel,whichassumesasharedsinglememorytobeusedforbothprograminstructionsanddata,DSPsusetheHarvardormodifiedHarvardarchitecture,whichincludesmultipleprogramanddatamemories,alongwithmultiplebusestoaccessthem.Thisarrangementmeansthatmuchlesswaitingisrequiredwheninstructionsornumbersarefetchedfrommemory.ITUrecommendedthatallgovernmentsreservespectrumat2GHzsodevicescouldroamseamlesslyfromcountrytocountry.Later,itwasrecognizedthat2Mbpsisnotcurrentlyfeasibleforuserswhoaretoomobile(duetothedifficultyofperforminghandoffsquicklyenough).Justlikeaconventionalcamera,adigitalcamerahasaseriesoflensesthatfocuslighttocreateanimageofascene.Butinsteadoffocusingthislightontoapieceoffilm,itfocusesitontoasemiconductordevicethatrecordslightelectronically.Amicroprocessorthenbreaksthiselectronicinformationdownintodigitaldata.Makesurethelenswillhandlethepicturesyouplantotake.Ifyoudon'thavetherightlens,itcanbehardtotakethebestpictures.Forexample,ifverycrispdetailisimportantinyourpictures,you'llprobablywantahighopticalzoomnumber.Besuretotryoutthelenssystemonacamerabeforeyoupurchaseit.Digitalcamerascomewithahugevarietyoflenses,sobesuretoshoparound.SECTION3Readthefollowingpassagesandanswerquestions(30minutes).PassageoneNaturemovesintheformofasinewave,beitanoceanwave,earthquake,sonicboom,explosion,soundthroughair,orthenaturalfrequencyofabodyinmotion.Energy,vibratingparticlesandotherinvisibleforcespervadeourphysicaluniverse.Evenlight–partparticle,partwave–hasafundamentalfrequency,whichcanbeobservedascolor.Sensorscanconverttheseforcesintoelectricalsignalsthatyoucanobserveandstudywithanoscilloscope.Oscilloscopesenablescientists,engineers,technicians,educatorsandothersto“see”eventsthatchangeovertime.Oscilloscopesareindispensabletoolsforanyonedesigning,manufacturingorrepairingelectronicequipment.Intoday’sfast-pacedworld,engineersneedthebesttoolsavailabletosolvetheirmeasurementchallengesquicklyandaccurately.Astheeyesoftheengineer,oscilloscopesarethekeytomeetingtoday’sdemandingmeasurementchallenges.Theusefulnessofanoscilloscopeisnotlimitedtotheworldofelectronics.Withthepropertransducer,anoscilloscopecanmeasureallkindsofphenomena.Atransducerisadevicethatcreatesanelectricalsignalinresponsetophysicalstimuli,suchassound,mechanicalstress,pressure,light,orheat.Amicrophoneisatransducerthatconvertssoundintoanelectricalsignal.Oscilloscopesareusedbyeveryonefromphysiciststotelevisionrepairtechnicians.Anautomotiveengineerusesanoscilloscopetomeasureenginevibrations.Amedicalresearcherusesanoscilloscopetomeasurebrainwaves.Thepossibilitiesareendless.Answerthefollowingquestionswithin50words.Q1: Areoscilloscopessignalssources?Whynot?Q2:Doestheword“demanding”meandifficultoreasy?Q3:Howcananoscilloscopemeasurethetemperaturechangeovertime?Q4:Whatfunctiondoesasensororatransducerperform?Q5:Pleasegivethereasonwhyoscilloscopesareregardedastheeyesofengineers?PassageTwoAlthoughover50yearsold,thestandardtelevisionsignalisstilloneofthemostcommonwaytotransmitanimage.Figure1showshowthetelevisionsignalappearsonanoscilloscope.Thisiscalledcompositevideo,meaningthatthereareverticalandhorizontalsynchronization(sync)pulsesmixedwiththeactualpictureinformation.Thesepulsesareusedinthetelevisionreceivertosynchronizetheverticalandhorizontaldeflectioncircuitstomatchthevideobeingdisplayed.Eachsecondofstandardvideocontains30completeimages,commonlycalledframes.Avideoengineerwouldsaythateachframecontains525lines,thetelevisionjargonforwhatprogrammerscallrows.Thisnumberisalittledeceptivebecauseonly480to486oftheselinescontainvideoinformation;theremaining39to45linesarereservedforsyncpulsestokeepthetelevision'scircuitssynchronizedwiththevideosignal.Determinethefollowingstatementistrue(T)orfalse(F):No.T/FStatementQ6:()Thetermcompositevideoisanaliasofstandardtelevisionsignal.Q7:()Therearemorethanonemethodsforvideotransmissionmentionedinthispassage.Q8:()Thecompositevideoisacombinationofframes,pictureinformationandsyncpulses.Q9:()Thenumber30frames/secondisalittledeceptive.Q10:()ThesyncpulsesareusedtocontrolthedeflectioncircuitsintheTVreceivers.题号B卷答案评分标准1.01Timingdiagram每译错一个单词扣0.5分，直至为零。1.02DR：DynamicRange1.03Edgedetection1.04Probe1.05Pulsewidth1.06Basestation1.07Cutofffrequency1.08Carrierwave1.09Real-timesystem1.10Pixel1.11模数转换器1.12数字信号处理1.13操作系统1.14离散余弦变换1.15发光二极管1.16电荷耦合器件1.17个人数字助理1.18任意函数产生器1.19阴极射线管1.20被测单元2.01传统的处理器遵循冯诺依曼结构模型，该结构模型采用一个单一的共享存储器，同时存储程序指令和数据；而数字信号处理器使用的是哈佛结构或改进哈佛结构，该结构包含多个程序和数据存储器以及访问这些存储器的多套总线。这样安排就意味着从存储器取指令或取数据所需的等待时间要少的多。每错译漏译一个单词或词组扣0.5分，每错译漏译一个句子结构扣1分，直至为零。2.02国际电联建议各国政府预留2GHz附近的频谱，以便设备能够在国与国之间实现无缝漫游。后来，人们认识到：对于移动性太强的用户，2Mbps在目前是不现实的（因为很难实现快速小区切换）。2.03和常规相机一样，数码相机也是通过一组透镜将光线聚集形成景物的像。但是，数码相机并不将光线聚集在胶片上，而是聚集在以电信号的形式存储光信号的半导体器件上。之后，微处理器将这些电信息转换成数字数据。2.04确保镜头能够处理将拍摄的画面。如果镜头不合适，就很难拍摄出最好的相片。例如