電子信息工程專業(yè)英語教程（第5版） 試卷與答案 試卷B

PAGEPagePAGE1ofNUMPAGES4TechnicalEnglishTestforElectronicInformationEngineeringDepartment____________Class___________Name____________Section123TotalScoreSECTION1Fillintheblankswithproperterms(30minutes).1時序圖6基站2動態(tài)范圍7截止頻率3邊緣檢測8載波4探頭9實時系統(tǒng)5脈沖寬度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.題號B卷答案評分標準1.01Timingdiagram每譯錯一個單詞扣0.5分，直至為零。1.02DR：DynamicRange1.03Edgedetection1.04Probe1.05Pulsewidth1.06Basestation1.07Cutofffrequency1.08Carrierwave1.09Real-timesystem1.10Pixel1.11模數轉換器1.12數字信號處理1.13操作系統(tǒng)1.14離散余弦變換1.15發(fā)光二極管1.16電荷耦合器件1.17個人數字助理1.18任意函數產生器1.19陰極射線管1.20被測單元2.01傳統(tǒng)的處理器遵循馮諾依曼結構模型，該結構模型采用一個單一的共享存儲器，同時存儲程序指令和數據；而數字信號處理器使用的是哈佛結構或改進哈佛結構，該結構包含多個程序和數據存儲器以及訪問這些存儲器的多套總線。這樣安排就意味著從存儲器取指令或取數據所需的等待時間要少的多。每錯譯漏譯一個單詞或詞組扣0.5分，每錯譯漏譯一個句子結構扣1分，直至為零。2.02國際電聯(lián)建議各國政府預留2GHz附近的頻譜，以便設備能夠在國與國之間實現(xiàn)無縫漫游。后來，人們認識到：對于移動性太強的用戶，2Mbps在目前是不現(xiàn)實的（因為很難實現(xiàn)快速小區(qū)切換）。2.03和常規(guī)相機一樣，數碼相機也是通過一組透鏡將光線聚集形成景物的像。但是，數碼相機并不將光線聚集在膠片上，而是聚集在以電信號的形式存儲光信號的半導體器件上。之后，微處理器將這些電信息轉換成數字數據。2.04確保鏡頭能夠處理將拍攝的畫面。如果鏡頭不合適，就很難拍攝出最好的相片。例如