《机电英语》答案文档格式.docx
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Somealloyingelementscausesteeltoresistcorrosion,andsuchsteelsarecalledstainlesssteels.
Ⅱ
T;
T;
F;
T
Ⅲ
1.known;
2.quicker,harder;
3.hardened;
4.adding
Ⅳ
1.碳钢只含有铁和碳，而合金钢则含有某些其他“合金元素”。
2.特种合金钢，如镍钢、铬钢。
3.高碳钢（含碳量＝0.60%～1.50%），这种钢也称为“工具钢”。
4.用含有钨、铬、钒、碳的高速钢制作的刀具能够比碳素工具钢以高得多的速度进行切削加工。
Passage2
Ⅰ
1.4
1.In1800AlessandroVoltadiscoveredtheprincipleoftheelectricbattery.
2.ThediscoveryofelectromagneticinductionbyMichaelFaradayin1831establishedmanyprinciplesformodernmachines.
1.voltageA.电荷
2.transmissionB.直流发电机
3.communicationC.传输
4.chargeD.通信
5.DCgeneratorsE.电压
1.thisperiod;
2.universally（widely）known;
3.agreateffect
Passage3
1.Importantstepshavebeentakensince1974towardfindingmajorapplicationsforopticalfibersincommunications.
2.Thesuccessofindustryinturningsucheffectivetechniquestoadvantagebydevelopinglow-costproductswilldeterminetheimpactwhichopticalfibershaveoncommunications.
3.Thetelephonesystemcanbedividedintothreenetworks:
thelocalnetwork,whichtiescustomerstotheirrespectivelocalswitchingofficersalmostonaone-to-onebasis;
large,relativelyshortgroupsoflinetietheswitchingofficestogether;
andevenlargerandmuchlongergroupsoflinesinterconnectcities.
4.Somedaylow-loss,large-bandwidthopticalfibersandtherequiredspecialelectronicsmaybehardlymoreexpensivethancopperwiresforprovidingalocalphoneservice.
5.Intendedforcomputerandcomputerapplications,opticalfibershavetheadvantageofsmallcablesizeandweightandimmunitytolightingandotherelectromagneticinterference.
F;
1.shifts;
2.bedivided;
3.benefits;
4.tocompete;
5.suggest
1.而且研究者们认为这种情况还将持续一段时间。
2.因此，局间中继网是最先受益于这种新技术的。
3.事实上，在许多工业化国家，各种与中继有关的通信系统正在建设或者已经运行。
4.光纤具有电缆尺寸小、重量轻、抗雷电等电磁干扰的优点。
5.在电流流过之前，开关必须闭合来完成电路。
SectionⅣWriting
FullName:
_______KallenDing_________________
Surname:
_____Ding_____________________
GivenName:
____Kallen___________________
Title:
_____DIRECTOR_________________________
Address:
___108DawsonRd.__Naperville,Illinois__60565USA____________________
E-mail：
____×
×
@_______________________
总经理generalmanager副教授associateprofessor
处长theheadofadepartment局长directorgeneral
deputysectionchief副科长assistantmanager副经理
deputyminister副部长vice-chancellor副校长
中国兰天实业有限公司进出口处
ImportandExportOfficeofChinaLantianIndustryCo.,Ltd.
刘军LiuJun
Tel：
021-8855×
Fax：
021-8852×
@
Room×
YamingApartment,No.7,TianshanRoad,Shanghai
SectionⅤLanguageSkillDevelopment
1-5BDBBC;
6-10ACDCB;
11-16AACDAA
Unit2
1.Youmeanalottome.
2.Tibetisworthvisiting.
1-5DDBCA
6-7CBDBD
following;
program;
business;
declare;
minute
1.Amachineelementis,therefore,asingleunitdesignedtoperformaspecificfunctionandcapableofcombiningwithotherelements.
2.Themostcommonexampleofamachineelementisagear,which,fundamentally,isacombinationofthewheelandthelevertoformatoothedwheel.
3.Otherfundamentalmachineelementshaveevolvedfromwheelandlever.
4.Intheautomotiveindustryonlyfasteners,bearings,bushings,chains,andbeltsarestandardized.
T
1-4ABBB
1.机械零件中最常见的是齿轮，它实际上是轮子和杆组合并带有齿的轮子。
2.齿轮的硬度决定了它的抗磨能力。
3.制造工程师们集中精力于标准化元素的开发。
4.这些零件都是大批量生产，成本低廉并力争完美。
2.5
1.Componentsareclassifiedintotwocategories—activeorpassive.
2.（FET）Fieldeffecttransistorisanothertypeoftransistor,whichisontheprincipleofrepulsionorattractionofchargesduetoasuperimposedelectricfield.
3.Diodesconnectedinawaythatonlythepositivehalf-cyclesofanalternatingcurrent（AC）arepermittedtopassarecalledrectifiertubes.
4.Capacitorsconsistoftwometalplatesthatareseparatedbyaninsultingmaterial.
1.forwardbiasA.双极型晶体管
2.integratedcircuitsB.阴极
3.magneticfieldC.集成电路
4.cathodeD.磁场
5.conductivityE.半导体
6.bipolartransistorF.电阻率
7.amplifierG.放大器
8.semiconductorH.正向偏置
1.H;
2.C;
3.D;
4.B;
5.F;
6.A;
7.G;
8.E
1.electronicsarerepelledfromthenegativebatteryterminalandpassunimpededtothep-region
2.withanadjustableslidingcontactarm
3.windedconductivelines
1.分布式光纤数据接口；
2.综合业务数字网；
3.多媒体应用软件
4.异步传输模式；
5.广域网；
6.局域网
7.标准租用线8.独立带宽；
9.随机时间间隔
10.双绞线
1.FibreDistributedDataInterface综合业务数字网
2.IntegratedServiceDigitalNetwork分布式光纤数据接口
3.multimediaapplication随机时间间隔
4.AsynchronousTransferMode标准租用线
5.WideAreaNetwork局域网
6.LocalAreaNetwork广域网
7.standardleasedline独立带宽
8.dedicatedbandwidth双绞线
9.randomtimeinterval多媒体应用软件
10.twistedpair异步传输模式
1.以太网还可以通过网桥和路由器连接起来，形成更大的网络。
2.一有空闲，计算机就发送分组。
3.分布式光纤数据接口可以用于各种物理媒体，如双绞线和光纤。
4.和标准线路相比，综合业务数字网还是偏贵，但比ATM（异步传输模式）要便宜得多。
5.这就意味着每个连接享有独立的带宽和灵活的访问速度。
1-5ADCCC;
6-10ACDDC
11-15AABBA;
16-20ACDBA
Unit3
1.Tombeatsotherstothedrawtotheproject.
2.Tobehonest,Tom.Canyoumakeyourselfuseful?
1-5CBDDD
6-10BCBDB
surface;
shadow;
coloured;
jumpers;
blinding
1.Thesearemanytypesofbearingsbecauseofvariationsinthedesignofringsandseparatorsandinthenumberofballs.
2.Althoughdeep-grooveballbearingsaredesignedtocarryaradialload,theyperformwellunderacombinedradialandthrustload.Forthisreason,itisthemostwidelyusedtypeofballbearings.
3.Bearingscanbedividedintoclassesaccordingtotheirfunction:
thosethatsupportaradial,thosethatsupportathrustload,orthosethatsupportacombinationofthrustandradialloads.
4.Becauserollerbearinghaslinecontactinsteadofpointcontact.
5.Yes,itistrue.
1.a;
2.g;
3.f;
4.e;
5.d;
6.c;
7.h;
8.b.
2.3.4.5.
1.Thewaterisforcedthroughtheclothesandthentheholesintheinnerwall.Afteronecycle,thewaterisrecycledbackintothetankandtheprocessstartsagain.Thiscycleiswhatcleanstheclothes.
2.Whirlpoolwashingmachineuseapulsatortoforcethewatertomovelikeawhirlpoolinsidethedrum.
3.（略）
4.Whirlpooltypewashingmachineuseapulsatortoforcethewatertomovelikeawhirlpoolinsidethedrum.Thespinningwaterforcesthedirtoutfromtheclothesinsidethemachine.Asfortheoperationalprincipleofcentrifugalforcetypewashingmachine,thewaterisforcedthroughtheclothesandthentheholesintheinnerwall.Afteronecycle,thewaterisrecycledbackintothetankandtheprocessstartsagain.Thiscycleiswhatcleanstheclothes.
1.adoublelayerdrumsA.内槽
2.innerwallofthedrumB.传动带
3.beltC.冷却风扇
4.outerwallofthedrumD.双层水槽
5.coolingfanE.振动机
6.pulsatorF.外槽
7.centrifugalforcetypewashingG.离心式洗衣机
1.D2.A3.B4.F5.C6.E7.G
1.canmakeawhirlpoolmoveupanddowntomakeitcleanclothesevenbetter
2.removesdirtfromtheclothes
3.clothesdon’tgettangledupsoyoudon’thavetoworryaboutyourclothesgettingrippedordamaged
4.butinnerdrumrotation
5.becauseofadoublelayerdrums
1-5DCBAC6-8BDB
1.besuspectedof电阻量程
2.highresistanceend依靠，依赖
3.inductivereactance电容器电桥
4.resistancerange绝缘电阻
5.bear...inmind怀疑
6.capacitorbridge高阻端
7.dependupon记住，考虑到
8.insulationresistance感抗
DearMary,
IfyouhavenootherplansforSunday,April4th（date）,wouldyouliketocometomyparty,thepartyisatmyhomeat__7p.m.______（specifictime）,KateandTomarealsojoiningus.
Withlove,
John
DearMeiYing,
Yourfriend,LiuBing,___calledyouat8:
20a.m.,April10,2017.Hehasgotsomenewideasforyourpaper.He’dliketomeetyouat3:
00p.m.,onthiscomingSaturdayattheuniversitygate.Healsohopesthatyoucancallhimbackatyourconvenience.
Yours,
LiPing
1-5ADBBD;
6-10BBDBA;
11-15CAAAA;
16-20ABBCC;
21-26AACBAB
Unit4
1.Whatthehellareyoutalkingabout?
2.Youhavetherighttoremainsilent.
1-5ABBDC
6-10DCCCD
tired;
fresh;
cover;
atnight;
warmair
1.Machinetoolsaremachinesforcutting
升级会员 