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(shí)序圖6基站2動(dòng)態(tài)范圍7截止頻率3邊緣檢測8載波4探頭9實(shí)時(shí)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(biāo)準(zhǔn)1.01Timingdiagram每譯錯(cuò)一個(gè)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(shù)轉(zhuǎn)換器1.12數(shù)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(gè)人數(shù)字助理1.18任意函數(shù)產(chǎn)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(jié)構(gòu)模型，該結(jié)構(gòu)模型采用一個(gè)單一的共享存儲(chǔ)器，同時(shí)存儲(chǔ)程序指令和數(shù)據(jù)；而數(shù)字信號處理器使用的是哈佛結(jié)構(gòu)或改進(jìn)哈佛結(jié)構(gòu)，該結(jié)構(gòu)包含多個(gè)程序和數(shù)據(jù)存儲(chǔ)器以及訪問這些存儲(chǔ)器的多套總線。這樣安排就意味著從存儲(chǔ)器取指令或取數(shù)據(jù)所需的等待時(shí)間要少的多。每錯(cuò)譯漏譯一個(gè)單詞或詞組扣0.5分，每錯(cuò)譯漏譯一個(gè)句子結(jié)構(gòu)扣1分，直至為零。2.02國際電聯(lián)建議各國政府預(yù)留2GHz附近的頻譜，以便設(shè)備能夠在國與國之間實(shí)現(xiàn)無縫漫游。后來，人們認(rèn)識到：對于移動(dòng)性太強(qiáng)的用戶，2Mbps在目前是不現(xiàn)實(shí)的（因?yàn)楹茈y實(shí)現(xiàn)快速小區(qū)切換）。2.03和常規(guī)相機(jī)一樣，數(shù)碼相機(jī)也是通過一組透鏡將光線聚集形成景物的像。但是，數(shù)碼相機(jī)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(chǔ)光信號的半導(dǎo)體器件上。之后，微處理器將這些電信息轉(zhuǎn)換成數(shù)字?jǐn)?shù)據(jù)。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