維電工高級(jí)技師復(fù)習(xí)資料及試題

1、謝謝觀賞2010維電工高級(jí)技師復(fù)習(xí)資料_及試題Word_文檔有答案1equipmentintheclassroomWithIntelcompanyonXXEducationCitydomainnetworkoftopiccasedesign,reliesonCiscocompanythoughtShuaidchuanprojectstafffreeprovideshasthreeyearstechnologysupport,from2009began,accordingtohighstandards,andhighofworkthought,andmanpowerplanning,andpoi

2、ntsstepimplementation,usingschoolearthquakeHoureconstructionofopportunities,againplanningelementaryandmiddleschoolscampusnetworkandeducationcitydomainnetwork,andlocalbroadcastingnetworkcompanycooperation,usingbroadcastTVnetwork,willphysicalfiberlayingtoeachschool,tominimumofcostachievedhasphysicalfi

3、berschoolschoolpass;Eachschoolconstructionstandardsofcampusnetworkandnetworkaccesstoallrooms;XXeducationmetropolitanareanetworkcentermachineroomequipmentintheMinistryofeducationstandardizationmanagementplatform,theCentralLibraryofaudio-visualeducationresources,setupaChineseteachereducationoudplatfor

4、m,implementedlinksthetwoplatforms.Atpresent,thecity'sprimaryandmiddleschoolstudentstocomputer3198,vitalitythan10:1;809equipmentclassesthroughtheclassroom(primaryandsecondary);36ofthecampusnetwork.Theestablishmentofanadvanced,practicalGigabiteducationalmetropolitanareanetwork,thecity'sschools

5、haveaccesstoeducationalmetropolitanareanetwork,schoolshavecomputernetworks,closed-circuittelevisionnetwork,broadcastnetworksintotheclassrooms,realizethetripleplay.SchoolsshareInternetbandwidth,canmeettheneedsofteachingoftheschoolofficeandatanytime.AccordingtoMinistryofeducationonfullstartedimplement

6、ationteachingpointsdigitaleducationresourcesfullcoverprojectofnotification(taughttechnicalletter(2012)74th,)andXXProvinceDepartmentofeducationonissuedXXprovinceteachingpointsdigitaleducationresourcesfullcoverprojectimplementationviewsofnotification(chuantaughtletter(2013)18th,)requirements,Icity6ate

7、achingpointsimplementationteachingpointsdigitaleducationresourcesfullcoverproject,combinedIcityspecificsituation,developedissuedhasXXCityBureauonteachingpointsdigitalresourcesfullcoverprojectofimplementationprogramme,EstablishedXX,fullcoverageofdigitalresourcesinmoderndistanceeducationteachingprojec

8、tleadinggroup,XX,chairedtheSecretaryforeducation.Established,digitalresourcesinmoderndistanceeducationteaching,XXfullcoverageprojectgroup,XX,DirectoroftheCenterforeducationalinformationandequipmentchairedZhuGuiyan,responsiblefordistanceeducationdigitalresourcescoveringprojectwork.ProjectsinXXcitysch

9、ooldigitalresourcesinmoderndistanceeducationteachingfull-coverageprojectleadinggroup,digitalresourcesinmoderndistanceeducationteaching,andXXfullcoverageprojectgroupleadershipandorganization,inaccordancewiththeunifiedarrangementofthewholeprovince,responsibleforuniversityeducationdigitalresourcescover

10、ingprojectmanagementandimplementation.Accordingtoprovincesarrangements,ICenterhasarrangementsGong一、單項(xiàng)選擇選擇一個(gè)正確的答案，將相應(yīng)的字母填入題內(nèi)的括號(hào)中。每題1分。)1. 一個(gè)完整的計(jì)算機(jī)系統(tǒng)包括。A、計(jì)算機(jī)及其外圍設(shè)備B、主機(jī)、鍵盤及顯示器C、軟件系統(tǒng)和硬件系統(tǒng)D、模擬電路部分和數(shù)字電路部分2. 小型變壓器的繞制時(shí)，對(duì)鐵心絕緣及繞組間的絕緣，按對(duì)地電壓的倍來選用。A、 1.5B、 2C、 3D、 43. 下列屬于輪廓控制型數(shù)控機(jī)床是。A、數(shù)控車床B、數(shù)控鉆床C、加工中心D、數(shù)控鏜床4. 機(jī)械

11、工業(yè)中常用的潤(rùn)滑劑主要有大類。A、 2B、 3C、 4D、 55. 內(nèi)燃機(jī)中的曲柄滑塊機(jī)構(gòu)，應(yīng)該是以為主動(dòng)件。A、滑塊B、曲柄C、內(nèi)燃機(jī)D、連桿6. 共發(fā)射極偏置電路中，在直流通路中計(jì)算靜態(tài)工作點(diǎn)的方法稱為。A、圖解分析法B、圖形分析法C、近似估算法D、正交分析法7. 直流差動(dòng)放大電路可以。A、放大共模信號(hào)，抑制差模信號(hào)B、放大差模信號(hào)，抑制共模信號(hào)C、放大差模信號(hào)和共模信號(hào)D、抑制差模信號(hào)和共模信號(hào)8. 直流電動(dòng)機(jī)轉(zhuǎn)速不正常，可能的故障原因是：A、電刷位置不對(duì)B、啟動(dòng)電流太小C、電機(jī)絕緣老化D、引出線碰殼9. 計(jì)算機(jī)在電力傳動(dòng)的自動(dòng)控制，一般分為。A、生產(chǎn)管理級(jí)和過程控制級(jí)B、單機(jī)控制和多機(jī)

12、控制C、直控級(jí)和監(jiān)控級(jí)D、管理級(jí)和監(jiān)控級(jí)10. 逆變器中的電力晶體管工作在狀態(tài)。A、飽和B、截止C、放大D、開關(guān)11. 在轉(zhuǎn)速負(fù)反饋系統(tǒng)中，閉環(huán)系統(tǒng)的轉(zhuǎn)速降減為開環(huán)系統(tǒng)轉(zhuǎn)速降的倍。A、 1+KB、 1+2KC、 1/(1+2K)D、 1/(1+K)12. 錐形軸與輪轂的鍵連接宜用聯(lián)接。A、楔鍵B、平鍵C、半圓鍵D、花鍵13. 數(shù)碼寄存器的功能主要是。A、產(chǎn)生CP脈沖B、寄存數(shù)碼C、寄存數(shù)碼和移位D、移位14. PLC可編程序控制器，整個(gè)工作過程分五個(gè)階段，當(dāng)PLC通電運(yùn)行時(shí)，第四個(gè)階段應(yīng)為。A、與編程器通訊B、執(zhí)行用戶程序C、讀入現(xiàn)場(chǎng)信號(hào)D、自診斷15. 一直導(dǎo)體放在磁場(chǎng)中，并與磁力線垂直，當(dāng)

13、導(dǎo)體運(yùn)動(dòng)的方向與磁力線方向成夾角時(shí)導(dǎo)體中產(chǎn)生的電動(dòng)勢(shì)最大。A、90°B、 30°C、 45°D、 0°16. 晶閘管斬波器是應(yīng)用于直流電源方面的調(diào)壓裝置，其輸出電壓(。A、是固定的B、可以上調(diào)，也可以下調(diào)C、只能上調(diào)D、只能下調(diào)17. 縮短輔助時(shí)間的措施有。A、縮短作業(yè)時(shí)間B、提高操作者技術(shù)水平mprove,securitypreventioncapacityobviouslyenhanced,securityhiddenandsecurityaccidentobviouslyreduced,effectiveguaranteesinformationh

14、ealthdevelopment.XXEducationCentreregularlycarryoutday-to-daynetworksecuritymonitoringinformationandequipment.Bytheappropriatetechnicalstaff,XXnetworkengineroommaintenancestaffonsitemanagementandmaintenanceonaregularbasis,scheduledviewingofnetworks,systems,databasesandassociatedequipmentoperatingcon

15、ditions,andmakearecord.Computerlabmaintenancemanagersregularlyrunavarietyofdevicesintheschoolinformationsystemparameters,serversystemsandvariousdatabackup,sothattherewasahardwarefailureinasystemcrashcanresumequicklyandefficiently.Computerlabmaintenancemanagersestablishanetworkantivirussystem,AviraVi

16、russystemonaregularbasis,andanti-virussoftwaresecurityassessment,timetoupgrade.Computerlabmaintenancemanagementforallequipmentintheroomaregulardust,replacetheoldlabel.Regularlyhostservers,networkswitches,corerouting,firewalls,hardwaremaintenance,suchasequipmentfailure,shouldbeprocessedinatimelymanne

17、rinordertoensuresafeandreliableoperationofthesystem.InXXcityinformationandequipmentwasestablishedwithintheCentre,educationalmetropolitanareanetworkcentermachineroomXX.ServersanddatastoresandapplicationstosetupinXXCitymetropolitanareanetworkcentermachineroom.WindowsServer2003,windowsServer2008,window

18、sServer2012,Linux,theoperatingsystem,thedatabaseforSQLServer2008,Officesoftware,suchasMicrosoftOfficesoftware.Schools(units)ofcomputer,informationsystemsecurityproductsfordomesticproducts,includingtheuseof360andkingsoftInternetsecuritysoftware.XXeducationmetropolitanareanetworkusedbytheserverforHP,f

19、irewallandinformationsecurityproductforHuaweiandCiscoproducts.Intheirdailywork,topublicizerelatedknowledgeandinformationsecurityconsiderations.Enhancedglobalawarenessofnetworkandinformationsecurity,andstrivetoachievenetworkeveryoneknowssecurityandvirusbeforetheguard,toimprovenetworkandinformationsec

20、urity,ensurethattheXXeducationsystemnetworkandinformationsystemsecurity.Trackingreportingsystemrequiresallpartiestostrengthencollaboration,workcloselywithemergencysafetyplandevelopedXXeducationmetropolitanareanetwork,regularlycarryoutemergencydrills,andcarriedoutspecialfundseveryyeartoprotectthesecu

21、rityofinformation.Annual2-3professionaltrainingfornetworkmanagersinthecity,formingtechnologywithastrongprofessionalandtechnicalteam,schoolnetworkmanagersoncommonnetworkfailuresandbecapableofsolvingsecurityissues.Issuesthatcannotberesolved,timelyformsofmeetings,suchasmeetings,analysis,equipmentinthec

22、lassroomWithIntelcompanyonXXEducationCitydomainnetworkoftopiccasedesign,reliesonCiscocompanythoughtShuaidchuanprojectstafffreeprovideshasthreeyearstechnologysupport,from2009began,accordingtohighstandards,andhighofworkthought,andmanpowerplanning,andpointsstepimplementation,usingschoolearthquakeHourec

23、onstructionofopportunities,againplanningelementaryandmiddleschoolscampusnetworkandeducationcitydomainnetwork,andlocalbroadcastingnetworkcompanycooperation,usingbroadcastTVnetwork,willphysicalfiberlayingtoeachschool,tominimumofcostachievedhasphysicalfiberschoolschoolpass;Eachschoolconstructionstandar

24、dsofcampusnetworkandnetworkaccesstoallrooms;XXeducationmetropolitanareanetworkcentermachineroomequipmentintheMinistryofeducationstandardizationmanagementplatform,theCentralLibraryofaudio-visualeducationresources,setupaChineseteachereducationoudplatform,implementedlinksthetwoplatforms.Atpresent,theci

25、ty'sprimaryandmiddleschoolstudentstocomputer3198,vitalitythan10:1;809equipmentclassesthroughtheclassroom(primaryandsecondary);36ofthecampusnetwork.Theestablishmentofandvanced,practicalGigabiteducationalmetropolitanareanetwork,thecity'sschoolshaveaccesstoeducationalmetropolitanareanetwork,sch

26、oolshavecomputernetworks,closed-circuittelevisionnetwork,broadcastnetworksintotheclassrooms,realizethetripleplay.SchoolsshareInternetbandwidth,canmeettheneedsofteachingoftheschoolofficeandatanytime.AccordingtoMinistryofeducationonfullstartedimplementationteachingpointsdigitaleducationresourcesfullco

27、verprojectofnotification(taughttechnicalletter(2012)74th,)andXXProvinceDepartmentofeducationonissuedXXprovinceteachingpointsdigitaleducationresourcesfullcoverprojectimplementationviewsofnotification(chuantaughtletter(2013)18th,)requirements,Icity6ateachingpointsimplementationteachingpointsdigitaledu

28、cationresourcesfullcoverproject,combinedIcityspecificsituation,developedissuedhasXXCityBureauonteachingpointsdigitalresourcesfullcoverprojectofimplementationprogramme,EstablishedXX,fullcoverageofdigitalresourcesinmoderndistanceeducationteachingprojectleadinggroup,XX,chairedtheSecretaryforeducation.E

29、stablished,digitalresourcesinmoderndistanceeducationteaching,XXfullcoverageprojectgroup,XX,DirectoroftheCenterforeducationalinformationandequipmentchairedZhuGuiyan,responsiblefordistanceeducationdigitalresourcescoveringprojectwork.ProjectsinXXcityschooldigitalresourcesinmoderndistanceeducationteachi

30、ngfull-coverageprojectleadinggroup,digitalresourcesinmoderndistanceeducationteaching,andXXfullcoverageprojectgroupleadershipandorganization,inaccordancewiththeunifiedarrangementofthewholeprovince,responsibleforuniversityeducationdigitalresourcescoveringprojectmanagementandimplementation.Accordingtop

31、rovincesarrangements,ICenterhasarrangementsGongC、減少休息時(shí)間D、減少準(zhǔn)備時(shí)間18. 串勵(lì)直流電動(dòng)機(jī)的機(jī)械特性是。A、一條直線B、雙曲線C、拋物線D、圓弧線19. 雙閉環(huán)調(diào)速系統(tǒng)中，電流環(huán)的輸入信號(hào)有兩個(gè)，即信號(hào)和速度環(huán)的輸出信號(hào)。A、主電路反饋電流B、主電路反饋轉(zhuǎn)速C、主電路反饋的積分電壓D、主電路反饋的微分電壓20. 互感器是根據(jù)原理制造的。A、能量守恒B、能量變換C、電磁感應(yīng)D阻抗變換21. 使用示波器時(shí)，要使圓光點(diǎn)居于屏幕正中，應(yīng)調(diào)節(jié)旋鈕。A“Y軸衰減”與“X軸位移”B“Y軸位移”與“X軸衰減”C“Y軸衰減”與“X軸衰減”D“Y軸位移”與

32、“X軸位移”22. 在電力電子裝置中，電力晶體管一般工作在狀態(tài)。A、放大B、截止C、飽和D開關(guān)23. 在我國(guó)，標(biāo)準(zhǔn)規(guī)定分度圓上的壓力角為度。A10B20C30D4524. 世界上發(fā)明的第一臺(tái)電子數(shù)字計(jì)算機(jī)是。A、ENIACB、EDVACC、 EDSACD、 UNIVAC25. 套筒聯(lián)軸器屬于聯(lián)軸器。A、剛性固定式B、剛性可移式C、彈性固定式D、彈性可移式26. 如果一直線電流的方向由北向南，在它的上方放一個(gè)可N極偏向。A、西方B、東方C、南方D、北方27. 工時(shí)定額通常包括作業(yè)時(shí)間、時(shí)間、休息與生活需要的時(shí)間、以及加工準(zhǔn)備和結(jié)束時(shí)間等。A、輔助B、布置工作地C、停工損失D、非生產(chǎn)性工作時(shí)所消耗

33、28. 通常所說的486、586微機(jī)，其中486、586的含義是。A、主存的大小B、芯片的規(guī)格C、硬盤的容量D、主頻29. 在負(fù)載增加時(shí)，電流正反饋引起的轉(zhuǎn)速補(bǔ)償其實(shí)是轉(zhuǎn)速上升，而非轉(zhuǎn)速量應(yīng)為。A、上升B、下降C、上升一段時(shí)間然后下降D、下降一段時(shí)間然后上升30. 當(dāng)PLC交流電梯額定速度大于0.63m/s時(shí)，安全鉗應(yīng)選用式。A、漸進(jìn)B、拋物線C、瞬時(shí)D、橢圓31. 使用JSS-4A型晶體三極管測(cè)試儀時(shí)，在電源開關(guān)未接通前，先將電壓選擇開關(guān)、電流選擇開關(guān)放在量程上。A、所需B、最小C、最大D、任意32. 在直流電路中，基爾霍夫第二定律的正確表達(dá)式是。A、EIU=0B、EU=0C、EIR=0D、

34、EE=033. 用晶體管作為電子器件制作的計(jì)算機(jī)屬于。A、第一代B、第二代C、第三代D、第四代34. 發(fā)電機(jī)的基本工作原理是：。mprove,securitypreventioncapacityobviouslyenhanced,securityhiddenandsecurityaccidentobviouslyreduced,effectiveguaranteesinformationhealthdevelopment.XXEducationCentreregularlycarryoutday-to-daynetworksecuritymonitoringinformationandequi

35、pment.Bytheappropriatetechnicalstaff,XXnetworkengineroommaintnancestaffonsitemanagementandmaintenanceonaregularbasis,scheduledviewingofnetworks,systems,databasesandassociatedequipmentoperatingconditions,andmakearecord.Computerlabmaintenancemanagersregularlyrunavarietyofdevicesintheschoolinformations

36、ystemparameters,serversystemsandvariousdatabackup,sothattherewasahardwarefailureinasystemcrashcanresumequicklyandefficiently.Computerlabmaintenancemanagersestablishanetworkantivirussystem,AviraVirussystemonaregularbasis,andanti-virussoftwaresecurityassessment,timetoupgrade.Computerlabmaintenancemana

37、gementforallequipmentintheroomaregulardust,replacetheoldlabel.Regularlyhostservers,networkswitches,corerouting,firewalls,hardwaremaintenance,suchasequipmentfailure,shouldbeprocessedinatimelymannerinordertoensuresafeandreliableoperationofthesystem.InXXcityinformationandequipmentwasestablishedwithinth

38、eCentre,educationalmetropolitanareanetworkcentermachineroomXX.ServersanddatastoresandapplicationstosetupinXXCitymetropolitanareanetworkcentermachineroom.WindowsServer2003,windowsServer2008,windowsServer2012,Linux,theoperatingsystem,thedatabaseforSQLServer2008,Officesoftware,suchasMicrosoftOfficesoft

39、ware.Schools(units)ofcomputer,informationsystemsecurityproductsfordomesticproducts,includingtheuseof360andkingsoftInternetsecuritysoftware.XXeducationmetropolitanareanetworkusedbytheserverforHP,firewallandinformationsecurityproductforHuaweiandCiscoproducts.Intheirdailywork,topublicizerelatedknowledg

40、eandinformationsecurityconsiderations.Enhancedglobalawarenessofnetworkandinformationsecurity,andstrivetoachievenetworkeveryoneknowssecurityandvirusbeforetheguard,toimprovenetworkandinformationsecurity,ensurethattheXXeducationsystemnetworkandinformationsystemsecurity.Trackingreportingsystemrequiresal

41、lpartiestostrengthencollaboration,workcloselywithemergencysafetyplandevelopedXXeducationmetropolitanareanetwork,regularlycarryoutemergencydrills,andcarriedoutspecialfundseveryyeartoprotectthesecurityofinformation.Annual2-3professionaltrainingfornetworkmanagersinthecity,formingtechnologywithastrongpr

42、ofessionalandtechnicalteam,schoolnetworkmanagersoncommonnetworkfailuresandbecapableofsolvingsecurityissues.Issuesthatcannotberesolved,timelyformsofmeetings,suchasmeetings,analysis,equipmentintheclassroomWithIntelcompanyonXXEducationCitydomainnetworkoftopiccasedesign,reliesonCiscocompanythoughtShuaid

43、chuanprojectstafffreeprovideshasthreeyearstechnologysupport,from2009began,accordingtohighstandards,andhighofworkthought,andmanpowerplanning,andpointsstepimplementation,usingschoolearthquakeHoureconstructionofopportunities,againplanningelementaryandmiddleschoolscampusnetworkandeducationcitydomainnetw

44、ork,andlocalbroadcastingnetworkcompanycooperation,usingbroadcastTVnetwork,willphysicalfiberlayingtoeachschool,tominimumofcostachievedhasphysicalfiberschoolschoolpass;Eachschoolconstructionstandardsofcampusnetworkandnetworkaccesstoallrooms;XXeducationmetropolitanareanetworkcentermachineroomequipmenti

45、ntheMinistryofeducationstandardizationmanagementplatform,theCentralLibraryofaudio-visualeducationresources,setupaChineseteachereducationoudplatform,implementedlinksthetwoplatforms.Atpresent,thecity'sprimaryandmiddleschoolstudentstocomputer3198,vitalitythan10:1;809equipmentclassesthroughtheclassr

46、oom(primaryandsecondary);36ofthecampusnetwork.Theestablishmentofanadvanced,practicalGigabiteducationalmetropolitanareanetwork,thecity'sschoolshaveaccesstoeducationalmetropolitanareanetwork,schoolshavecomputernetworks,closed-circuittelevisionnetwork,broadcastnetworksintotheclassrooms,realizethetr

47、ipleplay.SchoolsshareInternetbandwidth,canmeettheneedsofteachingoftheschoolofficeandatanytime.AccordingtoMinistryofeducationonfullstartedimplementationteachingpointsdigitaleducationresourcesfullcoverprojectofnotification(taughttechnicalletter(2012)74th,)andXXProvinceDepartmentofeducationonissuedXXpr

48、ovinceteachingpointsdigitaleducationresourcesfullcoverprojectimplementationviewsofnotification(chuantaughtletter(2013)18th,)requirements,Icity6ateachingpointsimplementationteachingpointsdigitaleducationresourcesfullcoverproject,combinedIcityspecificsituation,developedissuedhasXXCityBureauonteachingp

49、ointsdigitalresourcesfullcoverprojectofimplementationprogramme,EstablishedXX,fullcoverageofdigitalresourcesinmoderndistanceeducationteachingprojectleadinggroup,XX,chairedtheSecretaryforeducation.Established,digitalresourcesinmoderndistanceeducationteaching,XXfullcoverageprojectgroup,XX,Directorofthe

50、CenterforeducationalinformationandequipmentchairedZhuGuiyan,responsiblefordistanceeducationdigitalresourcescoveringprojectwork.ProjectsinXXcityschooldigitalresourcesinmoderndistanceeducationteachingfull-coverageprojectleadinggroup,digitalresourcesinmoderndistanceeducationteaching,andXXfullcoveragepr

51、ojectgroupleadershipandorganization,inaccordancewiththeunifiedarrangementofthewholeprovince,responsibleforuniversityeducationdigitalresourcescoveringprojectmanagementandimplementation.Accordingtoprovincesarrangements,ICenterhasarrangementsGongA、電磁感應(yīng)B、電流的磁效應(yīng)C、電流的熱效應(yīng)D、通電導(dǎo)體在磁場(chǎng)中受力35. 磁阻的單位是。A、亨/米B、1/亨C、

52、米/亨D、亨36. 滑差電動(dòng)機(jī)的機(jī)械特性是。A、絕對(duì)硬特性B、硬特性C、稍有下降的機(jī)械特性D、軟機(jī)械特性37. 電梯轎廂額定載重量為800kg，一般情況下轎廂可乘人應(yīng)小、/玨44為滿載。A、 10B、 5C、 8D、 1538. SR-8型雙蹤示波器中的電子開關(guān)處在“交替”狀態(tài)時(shí)，適合于顯示的信號(hào)波形。A、兩個(gè)頻率較低B、兩個(gè)頻率較高C、一個(gè)頻率較低D、一個(gè)頻率較高39. 在SBT-5型同步示波器使用的過程中，希望熒光屏上波形的幅度不大于厘米。A、 1B、 2C、 5D、 840. 三相并勵(lì)換向器電動(dòng)機(jī)調(diào)速適用于負(fù)載。A、恒轉(zhuǎn)矩B、逐漸增大轉(zhuǎn)矩C、恒功率D、逐漸減小轉(zhuǎn)矩41. 感應(yīng)同步器主要技

53、術(shù)參數(shù)有動(dòng)態(tài)范圍、精度、分辨率，其中動(dòng)態(tài)范圍為。A、0.240mB、0.220mC、0.340mD、0.320m42. 修理后的轉(zhuǎn)子繞組要用鋼絲箍扎緊，扎好鋼絲箍部分的直徑必須比轉(zhuǎn)子鐵心直徑小。A、 2B、 3C、35D、 643. 相同條件下，V帶和平帶相比，承載能力。A、平帶強(qiáng)B、一樣強(qiáng)C、V帶強(qiáng)約三倍D、V帶稍強(qiáng)44. 工時(shí)定額通常包括作業(yè)時(shí)間、布置工作地時(shí)間、休息與時(shí)間，以及加工準(zhǔn)備時(shí)間和結(jié)束時(shí)間。A、輔助B、生活需要C、停工損失D、非生產(chǎn)性工作時(shí)所消耗45. 在運(yùn)算電路中，集成運(yùn)算放大器工作在線性區(qū)域，因而要引入，利用反饋網(wǎng)絡(luò)實(shí)現(xiàn)各種數(shù)學(xué)運(yùn)算。A、深度正反饋B、深度負(fù)反饋C、淺度正反

54、饋D、淺度負(fù)反饋46. 工時(shí)定額通常包括作業(yè)時(shí)間、布置工作地時(shí)間、休息與生活需要的時(shí)間、以及和結(jié)束時(shí)間。A、加工準(zhǔn)備B、輔助時(shí)間C、停工損失時(shí)間D、非生產(chǎn)性工作時(shí)所消耗的時(shí)間47. 1946年世界上第一臺(tái)計(jì)算機(jī)由研制成功。A、英國(guó)B、法國(guó)C、日本D、美國(guó)48. 使用SR-8型雙蹤示波器時(shí)，如果找不到光點(diǎn)，可調(diào)整借以區(qū)別光點(diǎn)的位置。A、X軸位移B、Y軸位移C、輝度D、尋跡49. 交流雙速電梯每次到達(dá)平層區(qū)域，電梯由快速變?yōu)槁贂r(shí)，曳引電機(jī)處于制動(dòng)狀態(tài)。A、再生發(fā)電B、能耗C、反接D、電容50. 工時(shí)定額通常包括作業(yè)時(shí)間、布置工作地時(shí)間、與生活需要的時(shí)間、以及加工準(zhǔn)備和結(jié)束時(shí)間等。A、輔助B、休息

55、C、停工損失D、非生產(chǎn)性工作時(shí)所消耗mprove,securitypreventioncapacityobviouslyenhanced,securityhiddenandsecurityaccidentobviouslyreduced,effectiveguaranteesinformationhealthdevelopment.XXEducationCentreregularlycarryoutday-to-daynetworksecuritymonitoringinformationandequipment.Bytheappropriatetechnicalstaff,XXnetwork

56、engineroommaintenancestaffonsitemanagementandmaintenanceonaregularbasis,scheduledviewingofnetworks,systems,databasesandassociatedequipmentoperatingconditions,andmakearecord.Computerlabmaintenancemanagersregularlyrunavarietyofdevicesintheschoolinformationsystemparameters,serversystemsandvariousdataba

57、ckup,sothattherewasahardwarefailureinasystemcrashcanresumequicklyandefficiently.Computerlabmaintenancemanagersestablishanetworkantivirussystem,AviraVirussystemonaregularbasis,andanti-virussoftwaresecurityassessment,timetoupgrade.Computerlabmaintenancemanagementforallequipmentintheroomaregulardust,re

58、placetheoldlabel.Regularlyhostservers,networkswitches,corerouting,firewalls,hardwaremaintenance,suchasequipmentfailure,shouldbeprocessedinatimelymannerinordertoensuresafeandreliableoperationofthesystem.InXXcityinformationandequipmentwasestablishedwithintheCentre,educationalmetropolitanareanetworkcentermachineroomXX.ServersanddatastoresandapplicationstosetupinXXCitymetropolitanareanetworkcentermachineroom.WindowsServe