信息科学与电子工程专业英语课后答案王朔中.docx

信息科学与电子工程专业英语课后答案王朔中.docx

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信息科学与电子工程专业英语课后答案王朔中

信息科学与电子工程专业英语课后答案--王朔中

科技英语课件Exercises

Unit1ExercisesUnit1Exercises

（1）TranslatethefollowingsentencesintoChinese.

（1）TranslatethefollowingsentencesintoChinese.

1.Aswithseriesresonance,thegreatertheresistanceinthe

circuitthelowertheQand,accordingly,theflatterand

broadertheresonancecurveofeitherlinecurrentorcircuit

impedance.

对于串联谐振，电路中的电阻愈大Q值就愈低，相应

地线路电流或电路阻抗的谐振曲线也就愈平、愈宽。

2.Awirecarryingacurrentlooksexactlythesameand

weighsexactlythesameasitdoeswhenitisnotcarryinga

current.

一根带电的导线其外表与重量都与不带电导线完全一

样。

3.Clickmouseonthewaveformanddragittochangethe

pulserepetitionrate,ordirectlyenteranewvalueofthe

periodintheprovideddialoguebox,whilekeepingthe

pulsewidthunchanged.

在波形上点击鼠标并拖动来改变脉冲重复频率，或者在

提供的对话框中直接输入新的周期值，而保持脉冲宽度

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科技英语课件Exercises

不变。

4.Electronicsisthescienceandthetechnologyofthepassageofchargedparticlesinagas,inavacuum,orinasemiconductor.Pleasenotethatparticlemotionconfinedwithinametalonlyisnotconsideredelectronics.电子学是一门有关带电粒子在气体、真空或半导体中运

动的科学技术。

注意，在本书中粒子运动仅限于金属的

情况不属于电子学。

5.Hardwaretechnologieshaveplayedvitalrolesinourabilitytouseelectronicpropertiestoprocessinformation,butsoftwareanddataprocessingaspectshavenotdevelopedatthesamespeed.

硬件技术在我们使用电子特性来处理信息的能力中一

直起着重要作用，而软件及数字处理方面却没能与硬件

同步发展。

6.However,inaproperlydesignedDCamplifiertheeffectoftransistorparametervariation,otherthanIco,maybepracticallyeliminatediftheoperationpointofeachstageisadjustedsothatitremainsinthelinearoperationrange

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科技英语课件Exercises

ofthetransistorastemperaturevaries.

然而在设计得当的直流放大器中，若调节每一级的工作

点使之在温度变化时保持在晶体管线性区，就能在实际

上消除Ico以外的晶体管参数变化所造成的影响。

（2）Fillintheblankswiththemostappropriatechoice.

（2）Fillintheblankswiththemostappropriatechoice.

1.Amessagesignalcananyamplitudevalue

between0andAvolts.

A.assumeB.useC.receiveD.accept

2.Eachtimeapositiveclockedgeoccurs,theflip-flop

changesstate,leadingtohalfasmanypulsesattheoutput

totheclockinput.

A.asB.comparedC.dueD.soas

3.Intheprevioussectionwediscussedsine-waveorCW

modulationsystemsinwhichthemodulatingsignal

_______ofadigitalpulsetrain.

A.madeB.consistedC.containedD.

got

4.Inthisbookweshallemphasizethelimitationsimposed

ontheinformationtransmittedbythesystemthrough

whichitwas_______andshallattemptsomecomparison

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科技英语课件Exercises

ofdifferentsystems.

A.putB.traveledC.passedD.viewed

5.Thissignaleitherdoesnotchange,oritchanges______

byanamountequivalenttooneormorequantumsteps.

A.interruptedlyB.rudelyC.abruptlyD.

absolutely

6.Weshallonlybe_______withlogicalrepresentations,not

absolutevalues

A.interestedB.caringC.referredD.concerned

（3）Choosethephrasethatisclosestinmeaningtothe（3）Choosethephrasethatisclosestinmeaningtothe

underlinedpart.underlinedpart.

1.Itisalltooeasywithlinearcircuits,whichappear

relativelysimplewhencomparedwithtoday’scomplex

logicarrangements,toignoredetailedperformance

parameterswhichcandrasticallyreducetheexpected

performance.

A.whichhasbadinfluenceuponthesystemperformance

B.whichisimportanttoensurecircuitlinearity

C.whichispossibletoenhancethesystemperformance

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科技英语课件Exercises

D.whichiscrucialformaintainingthedesired

performance

2.Thereforetherewillbeaslighttimedelay,duetothepropagationdelayoftheflip-flopsbetweenthetimeoneflip-flopchangesstateandthetimethenextonechangesstate,i.e.,thechangeofstateripplesthroughthecounter,

andthesecountersarethereforecalledripplecounters.A.thestatechangeispropagatedthroughthecounterlike

ripples

B.thestatechangescauseripplesinthecounterC.passingthroughthecounter,thestateripplechangesD.thestateofthecounterchangesduetoripples

3.Insteadoftriggeringoneachpulse,aphaselocktechniqueexaminestherelativephasebetweeneachoscillatorandmanyofitssyncpulsesandadjustsoscillatorfrequencysothattheaveragephasediscrepancyissmall.

A.checkseachoscillatorformanysyncpulsesB.checksthephaserelationshipbetweenindividual

oscillatorsandacollectionofsyncpulsesC.looksattherelationsbetweenthephaseandthesync

pulses

D.examineswhetherthephaseisrelativetotheoscillator

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科技英语课件Exercises

andthesyncpulses

4.Bykeepingtheoffstateslightlybelowthreshold,thedelay

betweentheappliedelectricalpulseandtheresultingopticaloutputpulseisminimized;thisdelaymustindeednotbemorethanthebitintervalsothattheoptical