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1、 Unit3 Computers.阅读理解Companiesthathaveinvested(投资)heavilyinbigdatawanttoknowhowtomakesmartinvestmentsthatwilldistinguishthemfromthecompetitionandenablethebestpossiblereturnbeforemakingthedecisiontogoallin.Inthepast,notallenterprisebigdataplanswentasplanned.Thesefailuresarenotusuallypublished,buttheb
2、igdatafailurerateisunusuallyhigh.AccordingtoGartner,only15%ofbusinessesmakeitpasttheexperimentalstageoftheseprojects.Ourfear,asleadersoftechnologycompanies,isthatwithsomuchattentionsurroundingartificialintelligence,thepressureisonforustoapplythetechnologywithoutfirstsettingclearbusinessgoalsandunder
3、standingthedifferencesbetweenartificialintelligenceandmachinelearningandhowtheyshouldbeapplied,thusriskingfallingbehindthemanydecision-makerswhoareadoptingtechnologies.Itseasytogetcaughtupinthegreatexpectationofartificialintelligenceaswellasitspromoted,includingbreakthroughslikedeeplearning,butthose
4、lookingtomakeanoutsizedinfluenceshouldinsteadfocusongoodold-fashionedmachinelearningorcheaplearning.Thedistinctionissimple:cheaplearningisaboutusingbasicmachinelearningtechniquesonstraightforwarddatasetsindifferentpartsofacompanytoproducealargenumberofsmall,gradualimprovements.Deeplearning,ontheothe
5、rhand,isaspecificpartofmachinelearning.Deeplearningisacollectionofadvancedmachinelearningapproachesthatmakebusinessdecisionsbasedonhighlycomplexdatasetspossible.Fortasksofanalysingrawdata,suchasimagesandvoicerecordings,deeplearningisbest.Butwhenitcomestoworkingonsimplified,structuredtypesofdata,weve
6、foundcheapmachinelearningwilldothetrick.Whenyouconsiderthatthemajorityofdataflowingthroughenterprisesfallsintothissecondcategory,itsclearwhichtoolmakesthemostsense.1.Whatdoweknowaboutinvestmentinbigdatafromthefirstparagraph?A.Itssecret.B.Itssafe.C.Itsrisky.D.Itsfruitful.2.Whichofthefollowingaddstoth
7、epressureontheleadingtechnologycompanies?A.Understandingartificialintelligenceandmachinelearning.B.Wastingtoomuchtimeonartificialintelligence.C.Fallingbehindothercompanies.D.Actingwithunclearbusinessgoals.3.Whatshouldcompanieswithambitionsconcentrateon?A.Astronginfluence.B.Bigbreakthroughs.C.Cheaple
8、arning.D.Deeplearning.4.Whatdoestheunderlinedphrase “dothetrick” inthelastparagraphreferto?A.Invest.B.Cheat.C.Function.D.Simplify.阅读七选五根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Everythingisonlinethesedays,anditssoeasytosearchonlineforwhateveryouwant.TheInternetisavaluabletool,butitseasytofindyoursel
9、fdisturbedbyit.Forexample,youreworkingonanessay,andyouneedtodosomesearchonline.1Beforeyouknowit,youvespentanhourreadingmoreinformationthanyoullbeabletouse.Maybeyounoticeanattractivetitleorsomethingelsethatdrawsyouawayfromyourwork.2AddictiontosocialmediaiscloselyrelatedtoourgeneraladdictiontotheInter
10、net.Everyoneisalwaysontheirphones.3Asaresult,whenIgettowork,Idonthaveenoughattentionandenergytoputtowardsthetask.Ifthissoundslikeyou,thenyourproductivityhassufferedbecauseofthewayyouusetheInternet.4Soweshouldlearntolivewithit.TheonlywaytostoptheInternetfromoccupyingallyourtimeandconcentrationistodis
11、connect.Whenyoudisconnect,youllgetyourattentionbackandworkproductively.Thus,whenworkingonachallengingtask,keepyourphoneoutofreach.Meanwhile,gointoyourworkwiththeintentionofhavinggreaterfocusandenergysothatyoullbediscouragedfromusingtheInternet.5Thispressurewillhelpyougetthejobdoneontime.A.Yoursearch
12、termsbringback20pagesofresults.B.Onthewhole,theInternetcanbeahelporablock.C.Itwilldrawyourattentiontomoreimportantmatters.D.TheInternethaschangedthewayourworldfunctions.E.Asaresult,timedisappearsbutyoustilldontfinishyourwork.F.Ihavesurelycaughtmyselfcheckingmyphoneeverytenminutes.G.Besides,youcanfor
13、ceyourselftocompleteyourtaskinthefixedtime.完形填空Oneday,LukeFortunedrovefromOregontoPortland,whereheparkedhiscarinapaidgarageovernight.Thenextmorning,he1thecarswindowhadbeenbroken,alongwithhis2forthefuture:hiscomputerwas3. “Everythingimportanttomewasonthatcomputer,” saidFortune. “Ifelt4.”Twodaysaftert
14、he5,anotheryoungmancalledFortune.MasoudAlmazroueiwasanexchangestudentfromtheUnitedArabEmirates.Hedbeen6byamanwhosaidhehadacomputerforsale.Only$200.Almazrouei7acomputer,soheboughtit,tookithome,andturnediton.Withinseconds,hesawfilesandphotographs. “Iwonderedwhowould8acomputerwithallofthisonit,” hesaid
15、. “I9itcouldbestolen.” Almazroueifoundwhatappearedtobetheownersphonenumberandcalledit10.“Hetoldmethestoryandsaiditwashisfault.Ithoughtitwasa11.Itoldhimifhereallyhadthe12,heshouldtakeittothepolice,” Fortunesaid.13,apoliceofficercalledFortunetosaythatamanhaddroppedthecomputeroffandsaidhewas14.Hepassed
16、onthemansnumber.FortunecalledandthankedAlmazroueiand15payinghimarewardof$200themoneyhewasout.Almazrouei16.Whenareportaboutthetwoyoungmensstorymadeittothelocalpapers,Almazroueireceiveda(n)17fromWimWiewel,thethenpresidentoftheuniversitywhereAlmazroueiwasstudying.Impressedwithhisstudents18,WiewelgaveAlmazroueianewco
