科技英语写作高级教程第二版参考答案.docx

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.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.Theprogramtobeexecutedisstoredint