电子信息专英语及答案.docx
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电子信息专英语及答案.docx
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电子信息专英语及答案
三江学院高等职业技术学院
2011至2012学年第一学期试卷
课程名称专业英语使用班级A095091(考试时间120分钟)
(开卷闭卷√半开卷)(A卷√B卷)
一
二
三
四
五
总分
阅卷人
核查人
注:
所有答案都写在答题纸上,否则不得分。
1.Readingcomprehension阅读理解(共10分,每小题2分)
PassageA
TheeffectivevalueofvoltageandcurrentisthecommonmethodofexpressingtheValueofAC.ThisisalsoknownastheRMSvalue.TheeffectivevalueofACisdefinedintermsofanequivalentheatingeffectwhencomparedtoDC.OneRMSampereofcurrentflowingthrougharesistancewillproduceheatatthesamerateasaDCampere.Forpurposeofcircuitdesign,thepeakvaluemayalsobeneeded.Forexample,insulationmustbedesignedtowithstandthepeakvalue,notjusttheeffectivevalue.Itmaybethatonlytheeffectivevalueisknown.Tocalculatethepeakvalue,multiplytheeffectivevalueby1.41.
1.Whichequationistrue?
()
A.Vpeak×1.41=VrmsB.Vpeak÷0.707=Vrms
C.Vpeak×0.707=Vrms
2.Accordingtothepassage,iftheeffectivevalueis100V,thepeakvalueis().
A.141B.70.9C.70.7D.14.1
PassageB
Thehigherthefrequencyoftheanaloguesignal,themoreoftenitmustbesampled.However,itisusuallyadequatetosampleasignalattwiceitshighestfrequency.Eachbinarydigitusedtoshowabinaryvalueisknownasabit.TheaccuracyofconversionislimitedbythenumberofbinarybitsusedbytheADC.Iftheconversionismadeusingafour-bitADC,onlysixteendifferentbinaryvaluescanbeproduced.Thesmallestvalueis0000andthelargestis1111.Ifan8-bitADCisused,then256differentdigitalvaluescanbeproduced.Whenameasurementoftheanaloguesignaldoesnotcoincidewithoneofthesebinaryvalues,itmustberoundedupordown.
3.Iftheanaloguesignalisu=sin(200πt),thentheadequatesamplingfrequencymustbemorethan
().
A50Hz.B.100HzC.200HzD.50πHz
4.Iftheconversionismadeusingaten-bitADC,()differentbinaryvaluescanbeproduced.
A.1024.B.256C.512D.10
5.ExplaintheunderliningwordinChineseaccordingtothearticle.
roundedupordown
二.PleasetranslatefollowingfivepassagesintoChinese将下列句子和段落翻译成汉语(共40分,第小题每题5分)
1.Differentsignalsarethosethatusetwocomplementarypathscarryingcopiesofthesamesignalinequalandoppositepolarity.
2.ThereareseveralreasonstouseFLASHmemoryinsteadofaharddisk:
FLASHmemoryallowsfasteraccess.Itisnoiseless,lighter,andsmallerinsizeandhasnomovingparts.
3.Digitalsignalprocessingisanessentialelementofcountlesshomeandbusinesssystems.Itsdomaincanonlyincreaseastimeproceeds.Thus,DSPisbecominganessentialareaofexpertisefortechnologistsandengineers.
4.Riseandfalltimearemeasuresofthetimeittakesthesignaledgetomakeatransitionfromonestatetoanother.Inmoderndigitalcircuitry,thesevaluesareusuallyseveralnanoseconds.
5.Bandwidthmeansthetransmissioncapacityofanelectronicpathwaysuchasacommunicationslineorcomputerbus.Inadigitalline,itismeasuredinbitspersecondorbytespersecond.Inaanalogline,itisthedifferencebetweenthehighestandlowestfrequenciesandismeasuredinHertz.
6芯片就是一小片潜入了集成电路的半导体材料。
芯片的典型尺寸不超过一个平方英寸,却能包含几百万个晶体管。
芯片的类型多种多样。
例如,CPU芯片内包含完整的处理单元,而存储芯片包含的是空白存储单元。
7.噪声限定了系统可以处理的数据信号。
噪声降低了放大器、接受器等设备辨别信号的能力——因为噪声和输入信号混合起来。
运算放大器产生的噪声、电阻噪声和电源噪声决定了能够恢复和测量的信号大小。
8“信道”这个术语通常指频分多址系统中的一个频率,时分多址系统中的一个时限,码分多址系统中的一个代码或混合系统中的频率、时隙、代码的某种组合。
三.TranslatethefollowingwordsandexpressionsintoChineseandviceversa.词组英汉互译(共20分,每题2分)
1.VLSI2.CMOS3.ROM4.AWG5.transmissionbandwidth
6.半导体7.波形编码8.激励信号9.逻辑分析仪10.频率屏蔽
四.Fillintheblankswithsuitablewordsorexpressionsfromthelistgivenbelow,andchangetheformwherenecessary.从下面方框中选择合适的词或表达,以其适当的形式填空。
(共10分,每空2分)
Similarlytomakeuposcilloscopeorlogicanalyzerfor
Manyengineerslookattasksliketroubleshootinganddesignaspurely“measurement”challenges,andtendtothinkreflexivelyoftheir1asthewholesolution2theproblem.Buttheseacquisitioninstrumentshaveanimportantpartnerintheirwork:
thestimulusinstrument----thesignalsource.
Stimulusandacquisitioninstrumentstogether3acompletesolutionthatcandriveadevice-under-testwiththeindustry-standardsignalsforacquisition.Butonlywithasignalsourcecanengineersreallycontrolwhatgoesintothedevice.Andthatisoftenanecessity4makingsenseofwhatcomesoutofthedevice.
5,thesignalsourcemakesmargintestingandcharacterizationpossible.Workingwithasignalsourceandoscilloscopeorlogicanalyzer,engineerscanexplorethelimitsoftheirdesigns’performance–introducingdeliberatestresseswiththesourceandmeasuringtheresultswiththeoscilloscope,orcapturingdatawithlogicanalyzerwhendigitalerrorsoccur.
五.TranslatethefollowingparagraphintoChinese.将下列段落翻译成汉语(共20分)
DSPsareprogrammedinthesamelanguagesasotherscientificandengineeringapplications,usuallyassemblyorC.Programswritteninassemblycanexecutefaster,whileprogramswritteninCareeasiertodevelopandmaintain.Intraditionalapplications,suchasprogramsrunonpersonalcomputers,Cisalmostalwaysthefirstchoice.Ifassemblyisusedatall,itisrestrictedtoshortsubroutinesthatmustrunwiththeutmostspeed.However,DSPprogramsaredifferentfromtraditionalsoftwaretasksintwoimportantrespects.First,theprogramsareusuallymuchshorter,say,onehundredlinesversustenthousandlines.Second,theexecutionspeedisoftenacriticalpartofapplication.
《电子信息技术专业英语》(B卷)答题纸
姓名学号
一
二
三
四
五
总分
阅卷人
核查人
一.Readingcomprehension阅读理解(共10分,每小题2分):
1-5,,,,
二.PleasetranslatefollowingfivepassagesintoChinese将下列句子和段落翻译成汉语(共40分,第小题每题5分)
1.
2.
3.
4.
5.
6.
7.
8.
三.TranslatethefollowingwordsandexpressionsintoChineseandviceversa.词组英汉互译(共20分,每题2分)
12
34
56
78
910
四.Fillintheblankswithsuitablewordsorexpressionsfromthelistgivenbelow,andchangetheformwherenecessary.从下面方框中选择合适的词或表达,以其适当的形式填空。
(共10分,每空2分)
12
34
5
五.TranslatethefollowingparagraphintoChinese.将下列段落翻译成汉语(共20分)
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