unit4systemsoftware市公开课一等奖省赛课微课金奖课件

Unit4SoftwarePARTASystemSoftware1/22COMPUTERENGLISHToday’sContentsReview1SystemSoftware3NewWordsandExercise4SoftwareIntroduction22/22COMPUTERENGLISHSystemSoftware2DifficultPointTheexplanationsforcomplicatedstatements1KeyPointNewwordsandphrases

aboutMonitor3/22COMPUTERENGLISH1ReviewMonitorReviewCRTLCDKeySpecificationSize:18’’Contrastratio:800:1Aspectratio:4:3Max.Resolution:1024*800Brightness:250CD/MResponsetime:25msDotpitch:294mmdimensionsWidth:16.4inDepth:7.5inHeight:16.7inWeight:15.7lbWarranty:3yearsPowerconsumption:38wattsExteriorcolor:blackPlatform:pc/macSamsungSyncmaster910t19"LCDMonitor4/22COMPUTERENGLISH1ReviewPrinterReviewInk-jetPrinter(喷墨打印机)LaserPrinter(激光打印机)ThermalPrinter(热能打印机)Dot-matrixPrinter(点阵式打印机)5/22COMPUTERENGLISH1Review从年6.17-6.24打印机市场品牌调研HPEPSON

CanonLenovoSamsungLexmarkKonicaMinoltaXeroxFounderBrother30.06％28.13％20.79％9.08％4.32％1.57％1.49％1.39％0.97％0.75％1.47％6/22COMPUTERENGLISH1ReviewDVDReviewDVD(DigitalVideoDisc)DVD-ROMDVD-VideoDVD-RAMDVD-R数字化视频光盘视频存放DVD单次写入式DVD可覆写式DVD

只读式DVD7/22COMPUTERENGLISH1ReviewOpticalDisk/CompactDisk光盘CD-ROM只读式光盘DVD数字化视频光盘DVD-ROM只读式DVDDVD-Video视频存放DVDDVD-RAM可覆写式DVD

DVD-R单次写入式DVD

graphics:n.图形block:n.块，字，信息hardcopy硬拷贝，复印文本，复制件impactprinter击打式打印机dot-matrix:n.点阵spray:vt.喷射,喷溅drum:n.鼓,滚筒,圆筒CPS:每秒字符数thermal:adj.热量(温度)darken：vt.弄黑(变暗,使...含糊)exposure：n.曝光，曝光度8/22COMPUTERENGLISH?Questions1.WhydoyouthinkthatOperatingSystemsarenecessaryinorderforacomputertoruneffectively?2.ExplainfourtasksperformedbyanOperatingSystem.3.TherearemanydifferentbrandsofOperatingSystem.Identifyfourofthemostcommonones.4.ExplainhowanOperatingSystemcanmanagenumerouspeopleworkingatthesametime.Whatisthiscalled?9/22COMPUTERENGLISHexercises10/22COMPUTERENGLISH2SoftwareIntroductionSoftwareiscomputerinstructions(指令)

ordata.Anythingthatcanbestoredelectronically(电子地)issoftware.Thedistinction(区分)betweensoftwareandhardwareissometimesconfusing(搞乱)becausetheyaresointegrally(完整地)linked(连接).Clearly,whenyoupurchase(购置)aprogram,youarebuyingsoftware.Buttobuythesoftware,youneedtobuythedisk(hardware)onwhichthesoftwareisrecorded.Withoutsoftware,acomputerisjustablackboxofelectronicequipmentthatisincapable(不能)ofanyusefulfunction(功效).Softwaretellsthecomputerwhattodoandwhentodoit.Wewilllookatthedifferenttypesofsoftwarethatweneedtoknowabout.11/22COMPUTERENGLISH2SoftwareIntroductionTherearetwomaintypesofcomputersoftwarethatyouneedtoknowabout:systemsoftwareandapplication(应用)software:TypesofSoftwares:Systemsoftwareincludestheoperatingsystem(操作系统),utilityprograms(功效软件)

anddriverthatcontrolhowthehardwareofacomputerworks.Applicationsoftwareincludestheeveryday(日常)programsthatyouusesuchasWordProcessors,Spreadsheets(电子数据表)andDatabases(数据库).Italsoincludese-mailpackages(包),webbrowsers(浏览器)andanti-virus(反病毒)software.12/22COMPUTERENGLISH3SystemSoftware3.1OperatingSystem(OS)Acomputerismadeupofphysicalparts(元件)–forexamplememory,harddisk,motherboard,CPUandsoon.Butwithoutamethodofco-ordinating(协调)

theiruse,theyareofnoparticular(尤其)usetoanyone.Thetaskofco-ordinationisgivenovertoapieceofsoftwarecalledtheoperatingsystem.Theoperatingsystemispartofthesystemsoftware,itisneededtomakethesystemwork.Allcomputershaveanoperatingsystem.Itcontrolsthehardwareandisthelink(连接物)betweenyouandthecomputer.Inotherwords(换句话说),Itisaprogramthatallowsapplicationssoftwaretocommunicate(通信)withthehardware.HardwareOSApplicationSoftware13/22COMPUTERENGLISH3.1OperatingSystem14/22COMPUTERENGLISH3.1OperatingSystemTypesofOS

Therearequiteafewoperatingsystemsavailable(可取得)forcomputersbuttheyallbasicallydothesametaskofhandling(处理)thebasicoperationsthecomputer.Windows.Thisoperatingsystemisverywidelyusedonpersonalcomputersandcomputernetworks(网络).CommonofficeapplicationssuchasExcelrunonthissystemMacOSThiswascreatedbythemakersoftheMacintosh（麦金托什机）personalcomputertorunexclusively(专用)onthemachinesUnixApowerfuloperatingsystemcommonlyfoundonlargesystemssuchassuper-computersandmainframes.Itisespecially(尤其地)goodatallowingmanyuserstousethecomputersystematthesametime.LinuxAclose(亲密)relative(亲属)

ofUnixandisincreasingly(日益地)foundrunningWebservers(服务器)andothercomputernetworks.Itcanjustaseasilyrunapersonalcomputer.15/22COMPUTERENGLISH3.1OperatingSystemMaintasksofanOSLoads(加载)andrunapplications–morethanoneapplicationcanrunatthesametime(multitasking多任务)Shares(分享)outtheavailablememory.Movesdatatoandfromharddiskandotherstoragedevices.Communicates(通信)withperipherals

suchasprintersAcceptsdatafrominputdevicessuchaskeyboardandmouseSendsdatatothecorrectoutputdevices

suchasmonitororprinterItprovidesa“humancomputerinterface(HCI)人机交互界面“toallowpeopletousethecomputerefficiently(有效地)e.g.WindowsinterfaceSecuritymanages(安全管理)suchastheuseofpasswords(密码).Loggingin(登录)requirestheOperatingSystemtoconnecttheusertothecorrectdirectory(目录)andassign(指派)therightprivileges(特权).Allocates(分配)resourcessuchasprintersandfilestorage–thesehavetosharedbetweenallusers.16/22COMPUTERENGLISH3.2Utilityprograms（功效程序）Utilityprogramsareanotherextremely(非常地)usefulsetofsystemssoftware.Autilityprogramisdesignedtodooneorperhapstwotasksverywellandnothingelse.Quiteoften,aUtilityprogramisbuiltrightintotheoperatingsystem.ForexampleWindowsXPhasabuiltin(内嵌)‘Zip’compression(压缩)utilityyoucanusetocompressafile(文件)orfolder(文件夹).ThingsaUtilityprogramcando.Filesorting(排序)FilerenamingFileconversion(转换)(e.g.convertasoundfiletoMP3)Filerepair(修护)Diskmonitoring(磁盘管理)anddefragmentation(磁盘碎片整理)(defragging)PrintingjobsBackingup(备份)dataAnti-Virus(反病毒)Notethatautilityprogramonlydosoneorperhapstwoofthese.17/22COMPUTERENGLISH3.2Utilityprograms（功效程序）Utilityprogrammesprovidea‘toolbox’(工具箱)ofcommontasksneededtokeeptheco-mputeringoodorder.Thepi-cturebelowshowsutilityprogrammessupplied(提供)withWindowsXP.The‘DiskDefragmenter’forexamplewillre-arrange(重新排列)thefilesontheharddisktoimproveperformance(性能)andspeedupaccess.Ifyouroperatingsystembecomesdamaged(被损坏)orcorrupted(被打断),”SystemRestore”(系统恢复)willrecreate(重新创建)theoperatingsystemfromapreviousbackup(以前备份).18/22COMPUTERENGLISH3.3driverAdriverisanotherpieceofessential(基本)systemsoftware.Adriverisaspeciallywrittenprogramwhichtranslates(翻译)thecommands(命令)fromtheoperatingsystemintocommandsthathardwareunderstands,forexamplestheprinter,mouseandkeyboardeachhaveadrivertomakeitworkwiththeoperating