【课本习题】人教版必修二Unit3.doc

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1、【课本习题】人教版必修二Unit3作者：儒风无棣时间：2012年12月27日23:54Unit3课内练习答案（P19Ex.1）1642:Thecomputerbeganasacalculatingmachine.1936:Thecomputergrewrapidlybothinsizeandinbrainpower.1940s:Thecomputerhadgrownaslargeasaroom.1960s1970s:Computerswereusedinofficesandhomes.Now:Computersconnectpeopleallovertheworldtogeth

2、er.2.P19Ex.23.P20Ex.11revolution2network3simplify4calculate5mobile6solve7explore8totally9anyhow10finance4.P20Ex2exploreWebtechnologyartificialapplicationsintelligentlogicallyreality5.P21Ex.21.Anewpersonalcomputerhasbeenboughtbymyfriend.2.Mycomputerhasbeenrepairedbytheshopveryquickly.3.Mycomp

3、uterhasjustbeenattackedbyanunknownvirus.4.Theproblemhasnotbeensolvedbyusyet.5.Thecomputershavebeengivenawaytolocalschoolbythecompany.6.Akindofintelligentrobothasbeendevelopedbythescientists.6.P21Ex.34/47.P22Ex.2Twostudentsaretalkingaboutinformationtechnology.8.P22Ex.39.P22Ex.410.P23Ex.111.P2

4、3Ex.212.Workbook练习答案（P55Ex.2）P1:No.3P3:No2P4:No.113.P55Ex.34/414.P56Ex.11floppydisc2chips3monitor4modern5DVD-ROM6scanner7keyboard8printer15.P56Ex2Personallyelectronictypesdownloadlogicallyarisepossibilityvirusappearance16.P56Ex.31.Benlovesfootballandhisgreatesthappinessiswheneverhescoresagoa

5、l.2.Withthehelpofacomputer,youwillnotfindithardtodealwithandshareinformation.3.Jackfailedhisexamslasttermandfromthenonhisparentsstoppedhimplayingcomputergames.4.Idon’tliketowatchovermynaughtynieceeveryweekend,butmymotherinsiststhatIdo.5.WhenIwasyoung,Ididn’tliketohelpmymotherwiththecooking,b

6、utinawayithasbeenusefulasIamnowabletomakedeliciousfood.6.Acoachwhocantrainworldclassathleteswillbeuniversallypopular.7.Thesignaltotherocketgoingintospacewentwrong,andasaresultitexplodedandfellintothesea.17.P57Ex.1havebeengivenhasbeenmadehasbeenprovidedhavebeentaughthasbeentakenhasbeensetupha

7、sbeencompleted18.P57Ex.21.Thedatesofeachcoursehavebeenprintedinthenewspaperbytheteacher.2.Moreinformationhasbeengivenonitswebsitebythegovernment.3.Thecomputersciencedepartmentofthetrainingcoursebythegovernment.4.Ithasbeensuggestedbytheuniversitytha