科技英语写作高级教程第二版参考答案.docx
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科技英语写作高级教程第二版参考答案
V、练习参考答案
练习1
I、
1、the〔各项均为负。
)
2、the;a〔功率额定值是电阻器不会引起温度太大的上升而能平安地耗散的最大功率。
〕
3、an〔这是均方根值伏特计。
〕
4、The;a〔该设备的成功设计需要详细地了解性能指标。
〕
5、the;a;a〔在氢原子的布尔模型中,一个电子绕一个质子以半径为R的圆周运转。
〕
6、the〔电阻的单位是欧姆。
〕
7、an〔这是一个h参数。
〕
8、/;/〔图5-1画出了Oersted的实验。
〕
9、A;a;a〔机器是能够传递力来完成某一确定目的的一种设备。
〕
10、/〔水压机将在第14章加以考虑。
〕
11、the;the[/]〔我们容易确定参数μ的值。
〕
12、/;the〔根据式〔2-1〕,我们得到以下的关系式。
〕
13、the;/〔作者工作在位于阿林顿的得克萨斯大学。
〕
14、an〔甚至当积分区间并不是无穷时,能够恰当地显示一个时函数的傅氏变换的仪器是多么重要啊!
〕
II、
1.Dr.EmmetgraduatedfromHarvardUniversityin2001.
2.ProfessorLiearnedhisPh.D.degreeinmechanicalengineeringfromtheXi’anUniversityofTechnologyin1988.
3.Nowweshallturntothediscussionoflocalareanetworks.
4.TheBainbridgemassspectrometerisasimportantaninstrumentastheopticalspectrometer.
5.Howlongatime[或Howmuchtime]isrequiredtothisexperiment?
Thedensityofasubstanceisitsmassperunitvolume.
6.Anincreaseinpressurealwayscausesadecreaseinvolume.
7.Fig.(2-5)showswhatisexpressedbyEq.(2-2).
8.Theunitofinductanceisthehenry.
III、
1.TheUASMAprotocolemploysauniqueframestructure.
2.Finally,abroadsteppedimpedancetransformerisdesignedbythismethod.
3.Dynamicanalysisandevaluationofthesecurityofaproactivesecretsharingsystem
4.Theapproachcanbeappliedtotheone-dimensionalpotentialbarrierwithanarbitraryprofile.
5.WeproposeanumericalmethodbasedonNewton’siterativemethod.
练习2
I、
1.Thiscircuitconsistsofabattery,aninductorandacapacitor.
2.Computetheelectricfieldsatpointsa,b,andc.
3.ThissatelliteisusedforcommunicationsbetweentheUnitedStatesandGreatBritain,FranceandItaly.
4.Weassumethattheantennaisverticalandthatitslossiszero.
5.Chapters6,7,and8dealwithtransmissionlines.
II、
1.Itserrorissixpartsin1012.
2.Thiscomputerstoresfourtimesmoreinformationthanthatone(does).
3.Thedemandforthiskindofequipmentinthenearfuturewillbe20timeswhatitis.
4.Thevoltageacrossthiscomponentisafewtenthsofavolt.
5.Nowitsinternalpressureisonethirdwhatitwas.
III、
1.Thisobjectisoverfivetimesheavierthanthatoneis.
2.Unlessotherwisestated,itisassumedthatsilicontransistorsareusedandthatICBOcanbeneglected.
3.Thiscircuithastheadvantagesofsimplestructureandeasyadjustment.
4.Figs.1,2,and3showthisprocessindetail.
5.Forfurtherinformation,consultreferences[3,5,9].
练习3
I、
1.Thisnewtypeofcomputerhasmanyadvantagesoverthegeneraltype.
2.Itisnotdifficulttosolvethisdifferentialequationfortheunknownquantity.
3.Ofthesefivenewchapters,thefirstonedealswiththebasicprinciplesofnegativefeedback.
4.Atthispoint/time,currentdiffersinphasefromvoltageby90o.
5.Byanalyzing[Bytheanalysisof]theparametersoftheinstrument,wecanunderstanditsperformance.
6.Wewillfindoutitsaveragevelocityoverthisdistance.
7.Thescienceofelectronicsistooimportantintheworldtoday.
8.Theysolvedthisproblemwithgreatdifficulty.
II、
1.Forx>1,thereisnosolutiontothisequation[thisequationhasnosolution].
2.Upon[On]substituting[substitutionof]thesevaluesinto[in]the
equation,weobtainedthefollowingexpression..
3.ThiscircuitissimilarinoperationtothatofFig.1-10.
4.Thiscomputerisverygoodinperformance.
5.Thesewavestravelonlyinonedirection.
III、
1.Thispaperpresentsanewmethodfortherecognitionofradartargets.
2.TheinfluenceofthemovingstateofthetargetonthetrackingaccuracyoftheEKFisgreat.
3.Anothercomsatwaslaunchedonthemorningofthe8thofOctober.
4.Voltageismeasuredinvolts.
5.TheywillleaveforBeijingtoattendaninternationalconferenceonmobilecommunication.
6.Unlessotherwisestated,itisassumedthatsilicontransistorsareusedandthatICBOcanbeneglected.
7.
练习4
I、
1.Theforceactsperpendiculartothesurfaceofthetable.
2.Thethreecoefficientshereremainstobedetermined.
3.Thetwoequationsbelowwillbeoften(frequently)usedinlaterchapters/inthechapterswhichfollow.
4.Hereweusetwometalballs10cmapart.
5.Theoutputremains/staysconstant/unchanged/fixed/unaltered/thesame.
6.Allthetextbooksavailablediscussthisproblem.
7.Accurateinoperationandhighinspeed,computershavefoundwideapplications.
8.Theanswertothisproblemlookscorrect.
9.Twoparallelwiresadistance(of)δapartcarrythecurrenti.
10.Theproblemnowishowtomeasurethevoltageacrossthiscomponent.
11.Thesedatawillbesenttothecomputingcenter2kilometersaway.
12.Uponrearrangingtheequationabove,wehave[get,obtain]thefollowingexpression.
13.Thesechargescaninteractwithotherchargespresent.
14.Forcescanbetransmittedwithoutcontact,contrarytothecommonbelief.
15.Thiscoefficientistypically0.35.
II、
1.Inthiscase,theinputdoesnotfall;nor[neither]doestheoutput.[…;theoutputdoesnotfall,either.]
2.Theresistanceofaconductordependsnotonlyonthematerialofwhichtheconductorismade,butalsoonthesizeandtemperatureoftheconductor.
3.Thesescientistsareveryinterestedinthistopic.
4.Thisparametercanhardlybemeasured.
5.Inthislaboratory,thisinstrumentismoreexpensivethananyotherone/anyoneelse.
6.Thefeaturesofthisdevicearesmallsizeandlightweight.
练习5
I、
1.Thisequationcanbesolvedineitherofthefollowingtwoways/thetwowayswhichfollow.
2.Thisbaseballwillsooncometorestbecauseofitsinteractionwiththeground.
3.Ourchoiceofthiscoefficientas1iscorrect.
4.Fromitsdefinitionastheratioofaforcetoalength,wecanseethatkhasthesameunitaswork(does).
5.Ouranalysisofthemachineisofgreatsignificance.
6.Thisfacilitatestheiruseincircuitanalysis.
II、
1.Thispolicecarisequippedwithareceiverthesizeofamatchbox.
2.Wiresonehundredththediameterofasilkthreadareusedtoconnectthesecomponents.
3.Wemustwatercooltheseequipments/devices.
4.Inthepast,telephonecallswereoperatorconnected.
5.ACcanbechanged/turned/converted/transformed/translatedinto/toDC,aprocesscalled/knownas/referredtoasrectification.
6.Amagnetattractsironmaterials,afamiliarphenomenon.
7.Computersarecapableofprocessinginformation,aprocessthatpreviouslycouldbeaccomplishedonlyinsideourheads.
8.Aninstrumentformeasuringcurrent,voltage,andresistance,themultimeteriswidelyusedinelectricalengineering.
III、
1.Secs.1.1and1.2willdiscussseveralotherproblems.
2.Problemsarelisted/givenonpp.1-5.
3.Intheequationsabove,allh’sarethehybridparameters.
4.Themassofthestandardpoundisequalto0.4535924277kilograms.
5.Alla’sandb’sinEq.(5-1)arerelatedtotheimpedanceRo.
6.Wemusttaketheeffectoftemperatureon[upon]semiconductorsinto
account.
7.Inthiscase,thevariationofoutputwithinputisverysmall.
8.Thiscurveshowsthedependenceofdistanceon/uponspeed.
IV、
1.Noneofthemcansolvethisspecialtypeofdifferentialequation.
2.Theydonotknowwhetherthismaterialcanstandsolargeaforceornot.
3.ThereareMpolygonsaltogether,eachofwhichhasNvertexes.
4.Thesetwoengineersarebusy(in)designinganewkindofsoftware.
5.Ironisalmostasgoodaconductorasaluminum.
练习6
I、
1.Thisimage,itwillbenoticed,isarealimage.
2.Thistechnicalproblem,wehope,willbesolvedsoon.
3.210isapproximately1000,afactthatwethinkisveryusefulinthestudyofdigitalelectronics.
4.Aresistorofsay100ohmsshouldbeusedhere.
II、
1.Noneofthosetextbookshave/hasmentionedthispoint.
2.Allofthesexvaluescannotsatisfytheequation.
3.Neitherofthetwoconditionsissatisfiedhere.
4.Inthepreceding/previouschapter,wediscussedallkindsofforce.
5.Thispaperdescribesanewmethodfordesigningaircraft.
6.Bytheendofthelastcentury,thecompanyhadmanufactured5000
radars.
7.Since2008,thisresearchinstitutehasbeendevelopingaspecialkindofrobot.
III、
1.InSection1-2,theconceptofforcewasintroduced.
2.Asearlyasthe1940s,itwasfoundthatsemiconductorsareveryuseful.
3.Thisresultcanalsobearrivedatinanotherway.
4.Atthattimenousewasmadeofthisphenomenon/…,this
phenomenonwasmadenouseof.
5.Thispointwillbedealtwithinthenextsection.
IV、
1.Thiscomputerworksmuchbetterthanthatone(does)/Thiscomputerismuchbetterinperformancethanthatone(is)..
2.Thiscomputerrequiresmanymorecomponentsthatthatone(does).
3.Thedistanceofthemoonfromtheearthisasgreatas240000miles.
4.Thegreatertheresistance,thelongertimeittakesforthecapacitortoreachitsmaximumvoltage/…,thelongertimeisrequiredforthecapacitortoreachitsmaximumvoltage.)
5.Thecurrentassmallas0.1Acannotproduceenoughheat.
V、
1.Itiseasyforustodeterminetheweightofthebody.或:
Wecandeterminetheweightofthebodyeasily.
2.Thetwoengineersarebusy(in)designinganewtypeofcomputer.
3.Wefindthisconceptverydifficulttoexplain.
4.Noneofthesewindowscanwithstandsolargeaforce.
5.Workequals[isequalto]forcemultipliedby/timesdistance.
6.Theresultsobtainedagreewiththeexperimentalvalues.[…areinagreementwiththeexperimentalvalues.]
练习7
I、
1.Itwilltakeafewmonthstodesignthiskindofaircraftwiththehelpofacomputer.
2.Itisleftasaproblemto[for]thereadertoshowthatthisexpressionholds.
3.Theprogramtobeexecutedisstoredinthisunit.
4.T