ENTERUnit1Introductions&Greetings/AComputerOverviewUnit2SchoolDays/ComputerComponentsUnit3PersonalInformation/MemoryUnit4MajorsandSubjects/WhyIsaComputerSoPowerful?Unit5HobbiesandInterests/SystemUnitUnit6Holidays/OperatingSystemUnit7Sports/WindowsUnit8Shopping/OperatingaComputerUnit9Transportation/SystemSoftwareUnit10Friendship/ApplicationSoftwareUnit11WeatherandClimate/WordProcessorUnit12MyDream/SpreadsheetUnit13Traveling/OfficePowerPointUnit14Canteens/ProgramsUnit15SchoolClubs/DatabaseUnit16Taboo/NetworkTypesUnit17Smoking/InternetUnit18SuccessandFailure/CommunicationSystemUnit19AtaRestaurant/E-mailUnit20Occupation/E-commerceUnit21Resume/ArtificialIntelligenceUnit22Interview/ComputerVirusesTask1GeneralEnglishTask2EnglishforSpecialPurposesTask3GrammarTask4DrillsMajorsandSubjects/WhyIsaComputerSoPowerful?4

(ZhangHuaandZhangYanmeetontheplayground.Theyaretalkingabouttheirmajors.)ZhangHua:ZhangYan,areyoufromInformationTechnology

Department?ZhangYan:Yes,Iam.Howaboutyou?ZhangHua:Well,IlovedesignandIchooseCartoonand

AnimationDesignasmymajor.Iwanttobeananimator.ZhangYan:Soundsgreat!ZhangHua,whatisyourfavoritesubject?ZhangHua:Ilovetolearnthesoftware,Flash.Itissointeresting.Iamcrazyaboutit.ZhangYan:SodoI.Iwanttobeanexcellentwebdesigner,soImuststudyhardtousesomesoftwarewell.ZhangHua:Well,youmustlearnEnglishwellfirst,ifyouwanttousesoftwarewithskill.ZhangYan:That’strue.IwillstudyEnglishhard.IhopeyoucanhelpmewithMajorsandSubjects

ILoveMyMajor4myEnglish.ZhangHua:Sure,it’sfuntolearnEnglish.MajorsandSubjects4

WhydowelearnEnglish?

WelearnEnglishbecauseitisoneoftheworld’smostwidelyusedlanguages.ItisnotonlythelanguageofBritainbutalsoofCanada,theU.S.A.,AustraliaandNewZealand.ItisusedbymillionsofpeopleinAfricaandAsiaaswell.Today,itistheinternationallanguageoftrade,andmostimportantofall,theLanguageofservice.WiththehelpofEnglish,wecancommunicatewithpeopleofmanycountries.

HowcanwelearnEnglishwell?Thinkofwhatachilddoes.Helistenstowhatpeoplesayandhetriestocopywhathehears.Heusesthelanguage,talksandthinksinitallthetime.Itisimportanttorememberthatwelearnlanguagebylistening,notbywriting.Itisbesttolearnallthenewwordsbytheear.Wecanreadthem,spellthemandwritethemlater.Ifweworkhardatit,wecancertainlyovercomeallthedifficultiesandlearnEnglishwell.MajorsandSubjects

LearningEnglish4playgroun/?ple?ɡra?nd/n.運(yùn)動(dòng)場(chǎng)，操場(chǎng)department/d??pɑ?tm?nt/n.系，學(xué)部cartoon/kɑ??tu?n/n.卡通片animation/??n??me??n/n.動(dòng)畫(huà)animator/??n?me?t?(r)/n.漫畫(huà)家favorite/?fe?v?r?t/adj.喜愛(ài)的，中意的subject/?s?bd??kt/n.科目，學(xué)科software/?s?ftwe?(r)/n.軟件crazy/?kre?zi/adj.瘋狂的，狂熱的excellent/?eks?l?nt/adj.卓越的，極好的designer/d??za?n?(r)/n.設(shè)計(jì)家，制圖師widely/?wa?dli/adv.廣泛地Britain/?br?tn/n.英國(guó)Canada/?k?n?d?/n.加拿大Australia/??stre?l??/n.澳大利亞NewWordsandExpressions4NewWordsandExpressionsNewZealand/?nju??zi?l?nd/n.新西蘭million/?m?lj?n/num.百萬(wàn)Africa/??fr?k?/n.非洲Asia/?e???/n.亞洲international/??nt??n??n?l/adj.國(guó)際的trade/tre?d/n.貿(mào)易，商業(yè)service/?s??v?s/n.服務(wù)communicate/k??mju?n?ke?t/v.溝通，通信copy/?k?pi/v.復(fù)制overcome/???v??k?m/v.戰(zhàn)勝，克服difficulty/?d?f?k?lti/n.困難，難點(diǎn)aswell也，同樣thinkof考慮allthetime始終4

Computersarepowerfulformanyreasons.Theyperformtheinformationprocessingcycleoperations(input,process,output,andstorage)withamazingspeed,reliability,consistencyandaccuracy.①

Speed

Whendata,instructions,andinformationflowalongthose

circuitsinsystemunit,theytravelataveryfastspeed.Mostcomputerscarryoutbillionsofinstructionsinasecond.In2016,theworld’sfastestcomputercouldperform93thousandtrillionsofoperationsinjustonesecond.

ReliabilityandConsistency

Theelectroniccomponentsinmoderncomputersaredependablebecausetheyseldomfail.Thehighreliabilityofcomponentsenablesthecomputertoproduceconsistentresults.

Accuracy

Computerscanprocesslargeamountsofdataandgenerateerror-freeresultsifthedataisinputcorrectlyandinstructionsworkproperly.②

WhyIsaComputerSoPowerful?4StorageWithstoragedevices,acomputercantransferdataquicklyfromstoragetomemory,processit,andthenstoreitagainforfutureuse.

Communications

Mostcomputerstodaycancommunicatewithothercomputersthroughacommunicationdevice,suchasamodem.Inthisway,computerscanshareallthedataandinformationwithothercomputers.WhyIsaComputerSoPowerful?4perform/p??f??m/v.執(zhí)行cycle/?sa?kl/n.周期，循環(huán)operation/??p??re??n/n.操作input/??np?t/n.輸入output/?a?tp?t/n.輸出amazing/??me?z??/adj.令人驚異的reliability/r??la???b?l?ti/n.可靠性consistency/k?n?s?st?nsi/n.一致性，連貫性accuracy/??kj?r?si/n.精確性flow/fl??/v.流動(dòng)，通流circuit/?s??k?t/n.電路，巡回billion/?b?lj?n/n.十億trillion/?tr?lj?n/n.萬(wàn)億dependable/d??pend?bl/adj.可靠的seldom/?seld?m/adj.很少的，不常的NewWordsandExpressions4consistent/k?n?s?st?nt/adj.一致的，始終如一的generate/?d?en?re?t/v.產(chǎn)生，發(fā)生error/?er?(r)/n.錯(cuò)誤，誤差free/fri?/adj.自由的，沒(méi)有的correctly/k??rektli/adv.正確地properly/?pr?p?li/adv.適當(dāng)?shù)豷torage/?st??r?d?/n.

儲(chǔ)存，儲(chǔ)藏transfer/tr?ns?f??(r)/v.轉(zhuǎn)移，傳遞communication/k??mju?n??ke??n/n.通信share/?e?(r)/v.共享，分享informationflow信息流carryout執(zhí)行billionsof數(shù)十億的trillionsof數(shù)萬(wàn)億的NewWordsandExpressions41.

…withamazingspeed,reliability,consistencyandaccuracy.……以令人驚異的速度、可靠性、穩(wěn)定性和精確性介詞with接上一個(gè)短語(yǔ)，在句子一般表示憑借一種手段或一種方式，其后不能接動(dòng)詞原形，可以接名詞、代詞、動(dòng)名詞和名詞性從句等。2.

Computerscanprocesslargeamountsofdataandgenerateerror-freeresultsifthedataisinputcorrectlyandinstructionsworkproperly.如果數(shù)據(jù)輸入正確而且指令工作正常的話，計(jì)算機(jī)能處理大量的數(shù)據(jù)并產(chǎn)生無(wú)差錯(cuò)的結(jié)果。Notes4

并列句（CompoundSentence）是由并列連詞或關(guān)聯(lián)連詞將兩個(gè)（或兩個(gè)以上的）簡(jiǎn)單句連接在一起的句子。并列句不含任何從句，被連接起來(lái)的句子之間關(guān)系平等，不分主次。常見(jiàn)的并列連接句和關(guān)聯(lián)詞有and（和，以及），but/yet（但是，然而），so（因此，所以），or（或者，否則），for（因?yàn)椋琻or（也不）和both…and…（既……又……），either…or…（要么……要么……，不是……就是……），neither…nor…（既不……也不……），notonly…butalso…（不僅……而且……），whether…or…（是否，是……還是……）等。

簡(jiǎn)單句+并列連詞+簡(jiǎn)單句

Ilivenearanairportandpassingplanescanbeheardnightandday.我住在機(jī)場(chǎng)附近，日夜都能聽(tīng)到過(guò)往飛機(jī)的轟鳴聲。

ItwaswarmlastSunday,soIwentandsatontheriverbankasusual.上星期日天氣暖和，所以我像往常一樣，到河邊去坐著。IarrivedverylatebutIcaughtthetrain.

我很晚才到，但趕上了火車。

4英語(yǔ)句子（二）——并列句Isawhimyesterdaybuthedidnotgreetme.我昨天看到他了，但他沒(méi)有跟我打招呼。4英語(yǔ)句子（二）——并列句復(fù)合句（ComplexSentence）是由一個(gè)主句及一個(gè)或一個(gè)以上的從句組成的句子。其中，從句從屬于主句，并充當(dāng)主句中的某一成分。按照在主句中充當(dāng)?shù)某煞?，從句一般可以分為：主語(yǔ)從句、賓語(yǔ)從句、表語(yǔ)從句、同位語(yǔ)從句、定語(yǔ)從句、狀語(yǔ)從句等。其中，主語(yǔ)從句、賓語(yǔ)從句、表語(yǔ)從句和同位語(yǔ)從句又統(tǒng)稱為名詞性從句。各種從句的特點(diǎn)和用法將在后面的單元中進(jìn)一步講述。

Whatshesaidjustnowiscorrect.

她剛才說(shuō)的話是對(duì)的。（主語(yǔ)從句）

Tellmewhatyouwant.

告訴我你想要什么。（賓語(yǔ)從句）

ThegirlwhoistalkingtotheteacherisZhangHua.

那個(gè)正在和老師說(shuō)話的女孩是張華。（定語(yǔ)從句）

Whenitrains,Iusuallygototheofficebybus.

下雨時(shí)，我通常乘坐公共汽車去上班。（狀語(yǔ)從句）4英語(yǔ)句子（二）——并列句1.Oralpractice.Workinpairsandexchangetheinformationaboutyourmajorsandsubjects.2.

Pointouttheconjunctionsusedinthefollowingsentences.(1)Whenyougotoabanktoopenanaccount,youneedtowritedownyourownpersonalinformation.(2)IfyouwanttolinkyourcomputertotheInternet,youneedtogotothetelecomcompanyandyourpersonalinformationisneeded.

(3)SomearefromNorthChinaandsomearefromSouthChina.(4)Writedownyourpersonalinformationandyouwillgetyourlibrarycard.(5)I’dliketoborrowsomebooksbutIhavenolibrarycard.3.Choosethebestanswerfromthegivenchoices.(1)Thispassagemainly（主要地）tellsusthe

whycomputersaresopowerful.A.reasons B.informationC.communication D.data(2)WhichstatementisNOTtrueaboutthespeedofcomputers?_______

A4C

A.Whendata,instructions,andinformationflowalongthosecircuitsinsystemunit,theytravelathighspeed.B.Mostcomputerscancarryoutbillionsofoperationsinasecond.C.Mostcomputerscanperformt