西交2012春季专业英语离线作业及答案.doc

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1、成绩西安交通大学现代远程教育考试卷课程:专业英语专业班号考试日期年月日姓名学号期中期末一．根据下面的英文解释，写出相应的英文词汇。（共10分，每空1分）二.根据电气工程专业基本知识，判断正误。（共10分，每空1分）1.InalternatingcurrentanACgeneratorisusedtomakeelectronsflowcontinuouslyinonedirection.__错___2.InNorthAmerican50Hzisadoptedasstandardfrequencyinelectricpowersystem.___错__3.Acom

2、puter’smicroprocessoronlyunderstandshigh-levellanguage.___错__4.Instructionswritteninahigh-levellanguagemustbetranslatedintomachinelanguageinbinaryformbeforeacomputercanusethem._对___第1页共6页5.InalternatingcurrentanACgeneratorisusedtomakeelectronsflowcontinuouslyinonedirection.错_____6.I

3、nChinaalternatingcurrentisusuallygeneratedat60Hz.__错___7.Thenorthpoleofthearmatureisattractedtothesouthpoleofthemainfield.Thesouthpoleofthearmatureisattractedtothenorthpoleofthemainfield._对_8.Whenthreecapacitorsconnectedinseries,._错_9.Thecommutatorcanchangecurrentdirectioninthecondu

4、ctor._对_10.Mostcomputersareequippedwithakeyboardastheprimaryoutputdevice._对_三.基本词汇的英汉互译。（共15分，每题1.5分）1.____额定电流________ratedarmaturecurrent2.理想电源Idealvoltagesource_3._电路参数___________circuitparameters4.周期电流_Periodiccurrent___________5.__负反馈__________negativefeedback6.直轴_Directaxis___

5、________7.有功电流分量_Activecomponentofcurrent___________8._无功电流___________reactivecurrentcurrent9.电网___Powergrid_________10._数字继电器___________digitalrelays四.根据电气工程基本知识，完成填空。（共30分，每空1分）1.Resistorsare_____elements.A.passiveB.activeC.independentsourcesD.dependentsources2.Anelectricheaterdra

6、ws10Afroma120Vline.Theresistanceoftheheateris_____.A.1200ΩB.120ΩC.12ΩD.1.2Ω3.Thealgebraicsumofallvoltagesaroundaloopis_____.A.zeroB.indefinitevalueC.sumofvoltagerisesD.sumofvoltagedrops4.ON-OFFinformationcanberepresentedby_____signal.A.adigitalB.ananalogC.adiscreteD.acontrol第2页共6页5.

7、InNorthAmerican_____isadoptedasstandardfrequencyinelectricpowersystem.A.25HzB.50HzC.60HzD.125Hz6._____canprovideanasynchronouslinkbetweentwoacelectricpowersystemwithdifferentnominalfrequencies.A.TheHVDC(highvoltageDC)transmissionB.TheEHV(extra-highvoltage)ACtransmissionC.TheACdistri

8、butionD.Generators7