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科技英语写作高级教程参考答案
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安全地耗散的
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.degreeinmechanicalengineering
fromtheXi’an
UniversityofTechnologyin1988.
3.Nowweshallturntothediscussionoflocalareanetworks.
4.TheBainbridgemassspectrometerisasimportantaninstrumentastheoptical
spectrometer.
5.Howlongatime[或Howmuchtime]isrequiredtothisexperiment?
Thedensity
ofasubstanceisitsmassperunitvolume.
6.Anincreaseinpressurealwayscausesadecreaseinvolume.
7.Fig.（2-5）showswhatisexpressedbyEq.（2-2）.
8.Theunitofinductanceisthehenry.
III、
1.TheUASMAprotocolemploysauniqueframestructure.
2.Finally,abroadsteppedimpedancetransformerisdesignedbythismethod.
3.Dynamicanalysisandevaluationofthesecurityofaproactivesecretsharing
system
4.Theapproachcanbeappliedtotheone-dimensionalpotentialbarrierwithan
arbitraryprofile.
5.WeproposeanumericalmethodbasedonNewton’siterativemethod.
练习2
I、
1.Thiscircuitconsistsofabattery,aninductorandacapacitor.
2.Computetheelectricfieldsatpointsa,b,andc.
3.ThissatelliteisusedforcommunicationsbetweentheUnitedStatesandGreatBritain,FranceandItaly.
4.Weassumethattheantennaisverticalandthatitslossiszero.
5.Chapters6,7,and8dealwithtransmissionlines.
II、
121.Itserrorissixpartsin10.
2.Thiscomputerstoresfourtimesmoreinformationthanthatone（does）.
3.Thedemandforthiskindofequipmentinthenearfuturewillbe20timeswhatitis.
4.Thevoltageacrossthiscomponentisafewtenthsofavolt.
5.Nowitsinternalpressureisonesixteenthwhatitwas.
III、
1.Thisobjectisoverfivetimesheavierthanthatoneis.
2.Unlessotherwisestated,itisassumedthatsilicontransistorsareusedandthatICBOcanbeneglected.
3.Thiscircuithastheadvantagesofsimplestructureandeasyadjustment.
4.Figs.1,2,and3showthisprocessindetail.
5.Forfurtherinformation,consultreferences[3,5,9].
练习3
I、
1.Thisnewtypeofcomputerhasmanyadvantagesoverthegeneral
type.
2.Itisnotdifficulttosolvethisdifferentialequationforthe
unknownquantity.
3.Ofthesefivenewchapters,thefirstonedealswiththebasicprinciplesofnegativefeedback.
o4.Atthispoint/time,currentdiffersinphasefromvoltageby90.
5.Byanalyzing[Bytheanalysisof]theparametersoftheinstrument,wecan
understanditsperformance.
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.
th3.Anothercomsatwaslaunchedonthemorningofthe8ofOctober.
4.Voltageismeasuredinvolts.
5.TheywillleaveforBeijingtoattendaninternationalconferenceonmobilecommunication.
6.Unlessotherwisestated,itisassumedthatsilicontransistorsareusedandthatIcanbeneglected.CBO
7.
练习4
I、
1.Theforceactsperpendiculartothesurfaceofthetable.
2.Thethreecoefficientshereremainstobedetermined.
3.Thetwoequationsbelowwillbeoften（frequently）usedinlaterchapters/inthe
chapterswhichfollow.
4.Hereweusetwometalballs10cmapart.
5.Theoutputremains/staysconstant/unchanged/fixed/unaltered/the
same.
6.Allthetextbooksavailablediscussthisproblem.
7.Accurateinoperationandhighinspeed,computershavefoundwideapplications.
8.Theanswertothisproblemlookscorrect.
9.Twoparallelwiresadistance（of）δapartcarrythecurrenti.
10.Theproblemnowishowtomeasurethevoltageacrossthiscomponent.
11.Thesedatawillbesenttothecomputingcenter2kilometers
away.
12.Uponrearrangingtheequationabove,wehave[get,obtain]the
followingexpression.
13.Thesechargescaninteractwithotherchargespresent.
14.Forcescanbetransmittedwithoutcontact,contrarytothecommonbelief.
15.Thiscoefficientistypically0.35.
II、
1.Inthiscase,theinputdoesnotfall;nor[neither]doestheoutput.[⋯;theoutputdoesnotfall,either.]
2.Theresistanceofaconductordependsnotonlyonthematerialofwhichthe
conductorismade,butalsoonthesizeandtemperatureoftheconductor.
3.Thesescientistsareveryinterestedinthistopic.
4.Thisparametercanhardlybemeasured.
5.Inthislaboratory,thisinstrumentismoreexpensivethananyotherone/anyone
else.
6.Thefeaturesofthisdevicearesmallsizeandlightweight.
练习5
I、
1.Thisequationcanbesolvedineitherofthefollowingtwoways/thetwoways
whichfollow.
2.Thisbaseballwillsooncometorestbecauseofitsinteractionwiththeground.
3.Ourchoiceofthiscoefficientas1iscorrect.
4.Fromitsdefinitionastheratioofaforcetoalength,wecanseethatkhasthe
sameunitaswork（does）.
5.Ouranalysisofthemachineisofgreatsignificance.
6.Thisfacilitatestheiruseincircuitanalysis.
II、
1.Thispolicecarisequippedwithareceiverthesizeofamatchbox.
2.Wiresonehundredththediameterofasilkthreadareusedtoconnectthese
components.
3.Wemustwatercooltheseequipments/devices.
4.Inthepast,telephonecallswereoperatorconnected.
5.ACcanbechanged/turned/converted/transformed/translatedinto/to
DC,a
processcalled/knownas/referredtoasrectification.
6.Amagnetattractsironmaterials,afamiliarphenomenon.
7.Computersarecapableofprocessinginformation,aprocessthatpreviously
couldbeaccomplishedonlyinsideourheads.
8.Aninstrumentformeasuringcurrent,voltage,andresistance,the
multimeteris
widelyusedinelectricalengineering.
III、
1.Secs.1.1and1.2willdiscussseveralotherproblems.
2.Problemsarelisted/givenonpp.1-5.
3.
Intheequationsabove,allh
’sarethehybridparameters.
4.
Themassofthestandardpoundisequalto0.4535924277kilograms.
5.
Alla’sandb’sinEq.（5
-1）arerelatedtotheimpedanceR.o
6.
Wemusttaketheeffectoftemperatureon[upon]semiconductors
into
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.
103.2isapproximately1000,afactthatwethinkisveryusefulinthestudyofdigital
electronics.
4.Aresistorofsay100ohmsshouldbeusedhere.II、
1.Noneofthosetextbookshave/hasmentionedthispoint.
2.Allofthesexvaluescannotsatisfytheequation.
3.Neitherofthetwoconditionsissatisfiedhere.
4.Inthepreceding/previouschapter,wediscussedallkindsof
force.
5.Thispaperdescribesanewmethodfordesigningaircraft.
6.Bytheendofthelastcentury,thecompanyhadmanufactured5000radars.
7.Since2008,thisresearchinstitutehasbeendevelopingaspecial
kindofrobot.III、
1.InSection1-2,theconceptofforcewasintroduced.
2.Asearlyasthe1940s,itwasfoundthatsemiconductorsareveryuseful.
3.Thisresultcanalsobearrivedatinanotherway.
4.Atthattimenousewasmadeofthisphenomenon/
phenomenonwasmadenouseof.
5.Thispointwillbedealtwithinthenextsection.
⋯,this
IV、
1.Thiscomputerworksmuchbetterthanthatone（does）/Thiscomputerismuchbetter
inperformancethanthatone（is）..
2.Thiscomputerrequiresmanymorecomponentsthatthatone（does）.
3.Thedistanceofthemoonfromtheearthisasgreatas240000
miles.
4.Thegreatertheresistance,thelongertimeittakesforthe
capacitortoreachits
maximumvoltage/⋯,thelongertimeisrequiredforthecapacitortoreachitsmaximum
voltage.）
5.Thecurrentassmallas0.1Acannotproduceenoughheat.V、
1.Itiseasyforustodeterminetheweightofthebody.
determinethe
weightofthebodyeasily.
或:
Wecan
2.Thetwoengineersarebusy（in）designinganewtypeofcomputer.
3.Wefindthisconceptverydifficulttoexplain.
4.Noneofthesewindowscanwithstandsolargeaforce.
5.Wo
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