Unit 5 精講精練（原卷版）

必修第3冊(cè)Unit5Whatanadventure!目標(biāo)導(dǎo)航目標(biāo)導(dǎo)航重點(diǎn)詞匯1．thusadv.2．zonen．3．oxygenn．4．bordern．5．confirmv．6．a(chǎn)ttemptn．7．portn．8．a(chǎn)lcoholn．9．rubbern．10．guidelinen．11．clothn．12．liquidn．13．servantn．14．chargen．15．captainn．16．a(chǎn)headadv.17．chaptern．18．nutn．19．distinguishv．20．shoren．21．carpetn．22．broadadj.23．beneathprep.24．residentn．25．malen．26．sheeradj.27．psychologistn．28．bandagen．29．cottonn．30．stretchv．31．leaguen．32．helmetn．33．rayn．34．intensityn．詞匯拓展1．initialadj.開始的，最初的→adv.最初2．crowdn．人群→adj.擁擠的3．failuren．失敗→v．失敗4．thrilln．驚險(xiǎn)，刺激v．使興奮→adj.非常興奮的→adj.令人激動(dòng)的5．unawareadj.未覺察到的，未意識(shí)到的→adj.意識(shí)到的；明白的6．wooln．羊毛，毛織物→adj.羊毛的7．bleedingn．流血，失血→v．流血→n．血8．injuryn．損傷；傷害→vt.傷害→adj.受傷的9．permitv．允許，準(zhǔn)許，許可→n．允許，許可10．fascinatedadj.被迷住的，被吸引住的→v．深深吸引；迷住11．relatev．相聯(lián)系，有關(guān)聯(lián)；講述→adj.有關(guān)的12．a(chǎn)stonishv．使吃驚，使驚訝→adj.驚訝的→adj.令人驚訝的→n．吃驚，驚訝13．consumev．消耗→n．消費(fèi)；消耗14．graduallyadv.逐漸地，逐步地→adj.逐漸的15．surroundv．環(huán)繞，圍繞→adj.周圍的16．wrinkledadj.有皺褶的→n．皺紋v．皺起17．depthn．深，深度→adj.深的adv.在深處，至深處重點(diǎn)詞組1．使……成為焦點(diǎn)2．尋找3．到……末為止4．集中注意力于……5．弄明白；計(jì)算6．導(dǎo)致7．把……稱作……8．冒險(xiǎn)9．由……決定10．和……一起11．主管；掌管12．回顧13．在大白天重點(diǎn)句型VascodaGama(1460－1524)wasaPortugueseexplorerandbysea.瓦斯科·達(dá)·伽馬(1460－1524)是一名葡萄牙探險(xiǎn)家，也是第一個(gè)從海上到達(dá)印度的歐洲人。2．，coveritwithabandage.一旦傷口被清理干凈且變干，用繃帶包上。3．CaptainNemowalkedinfront，.尼摩船長走在前面，他的一個(gè)手下在后面幾步處跟著。4．thecalmsurfaceofthesea.在我上面是平靜的海面。知識(shí)精講知識(shí)精講1thusadv.因此，從而(教材P49)ChristopherColumbus(1451－1506)wasanItalianexplorerwhocompletedjourneysbetweenSpainandtheAmericas，thusmarkingthebeginningofEuropeanexplorationoftheAmericas.克里斯托弗·哥倫布(1451－1506)是一位意大利探險(xiǎn)家，他完成了西班牙和美洲之間的旅程，從而標(biāo)志著歐洲探索美洲的開始。Theuniversitieshaveexpanded，allowingmanymorepeoplethechanceofhighereducation.大學(xué)擴(kuò)招了，這樣就使更多人能有機(jī)會(huì)接受高等教育。Wedonotownthebuilding.，itwouldbeimpossibleforustomakeanymajorchangestoit.我們不是這棟樓房的房主，因此不能對(duì)它進(jìn)行大改動(dòng)。[知識(shí)拓展]thereforeadv. soconj. asaresult 2confirmv．證實(shí)，證明(教材P50)ThefirstpeopleconfirmedtohavereachedthetopwereEdmundHillaryandTenzingNorgayin1953.第一批被證實(shí)登上頂峰的人是1953年的埃德蒙·希拉里和丹增·諾蓋。Thenewsofholidaywaslaterbyourheadteacher.放假的消息，后來從班主任那里得到了證實(shí)。Hisguiltyexpressionmydoubt.他內(nèi)疚的表情證實(shí)了我的猜疑。[知識(shí)拓展]confirmationn． confirmedadj. confirmtohavedonesth. 3(be)similarto與……相似(教材P51)In2011，wordssimilartothoseofMallorywerespokenbyAmericanmountainclimberAlanArnette，whoclimbedQomolangmainthatyearandwasgoingtoclimbotherhighmountainsaroundtheworld.2011年，美國登山者艾倫·阿內(nèi)特說出了于馬洛所言類似的話。艾倫當(dāng)年攀登了珠穆朗瑪峰，并打算登上世界各地其他的高山。Thiswaitingforabusthatneverturnsup.這就跟等一輛永遠(yuǎn)也不來的公交車差不多。Shehasadictionarymine.她有一本和我的類似的詞典。[知識(shí)拓展]besimilarin similarlyadv. similarityn. 4ofocus使……成為焦點(diǎn)(教材P51)Itbringsintofocuswhat'simportanttoyou.登山會(huì)讓你把注意力集中在對(duì)你來說重要的事情上。Thiswillbroadenyourhorizonsandnewideasandopportunitiesintofocus.這會(huì)開闊你的視野，為你關(guān)注的事物帶來新的想法與機(jī)會(huì)。Recently，theissueofhealthhasbeen.最近健康問題成為人們關(guān)注的焦點(diǎn)。[知識(shí)拓展]focusn． v. focussth.on focusone'sattention/mind/energyon 5figureout弄明白(教材P51)Itforcesyoutolookdeepinsideyourselfandfigureoutifyoureallyhavethephysical，aswellasmental，toughnesstopushwhenyouwanttostop.它會(huì)迫使你深入觀察自己的內(nèi)心，弄清楚自己的身體和心理是否真的堅(jiān)韌不拔，在你想要停下的時(shí)候推動(dòng)你繼續(xù)向前。Ican'twhatheistalkingabout.我真搞不懂他在講什么。Noonecouldwherethegascamefrominhismagic.沒人能搞懂他魔術(shù)中的氣體來自哪里。[知識(shí)拓展]figuren． v. keepone'sfigure figureon figurethat 6attemptvt.企圖，嘗試n.努力，嘗試(教材P51)WiththemajorityofattemptstoclimbQomolangmaresultingeitherintotalsuccessorfailure，istherealsoascientificreasonbehindthisrisk-taking?大部分攀登珠穆朗瑪峰的嘗試都以大獲全勝或徹底失敗結(jié)束，那么，在這樣的冒險(xiǎn)背后是否也存在什么科學(xué)的原因呢？Inanattractmorecustomers，theytookavarietyofmeasures.為了吸引更多顧客，他們采取了各種措施。Theboysmadeantoleaveforcampingbutwerestoppedbytheirparents.男孩們想去野營，但被他們的父母攔住了。[知識(shí)拓展]attemptatdoingsth./todosth. makeanattemptatdoing/todosth. atone's/thefirstattempt 7(教材P51)Hereferstothepersonalitiesofthesepeopleas“TypeT”，withthe“T”standingfor“thrill”．他稱這些人的人格為“T型”，“T”代表“thrill(刺激)”。(1)referto...as把……稱之為WewhatarespeakingHan.我們把我們正在說的稱為“漢語”。Peoplewhoworkinofficesareusually“whitecollarworkers”．那些在辦公室工作的人被稱為“白領(lǐng)工人”。[知識(shí)拓展]refertosb. refertosth. (2)standfor代表；主張It'swellknownthattheolivebranchpeace.眾所周知，橄欖枝代表和平。WeChinesepeaceandwishtosettlealldisputesbypeacefulmeans.我們中國人民是主張和平的，希望用和平方式解決爭端。[知識(shí)拓展]standby standout standup can'tstandsth./doingsth. 8Itis＋過去分詞＋從句(教材P51)ItisstillnotknownifhesucceededinreachingthetopofQomolangmabeforeittookhislife.目前尚不清楚他是否在遇難前成功登頂珠穆朗瑪峰。句式分析：本句的結(jié)構(gòu)分析如下：we'llgoforanautumnouting.我們是否要去秋游還沒定下來。wearewronginthematter.在這件事上我們是否錯(cuò)了還有待觀察。[知識(shí)拓展](1)if引導(dǎo)的主語從句不能位于句首，只能位于句末，前面需用it作形式主語。if在從句中不充當(dāng)句子成分，僅起連接作用，意為“是否”。(2)whether引導(dǎo)主語從句時(shí)，可以置于句首，也可放于句末。whether在從句中不充當(dāng)句子成分，僅起連接作用，意為“是否”。9either...or...要么……要么……(教材P51)WiththemajorityofattemptstoclimbQomolangmaresultingeitherintotalsuccessorfailure，istherealsoascientificreasonbehindthisrisk-taking?大部分攀登珠穆朗瑪峰的嘗試都以大獲全勝或徹底失敗結(jié)束，那么，在這樣的冒險(xiǎn)背后是否也存在什么科學(xué)的原因呢？句式分析：本句中either...or...是連接詞，意為“或者……或者……；不是……就是……”。在這里連接兩個(gè)賓語。I'mgoingtomajormathsbiologyinuniversity，asbotharemyfavoritesubjects.在大學(xué)里我打算要么學(xué)數(shù)學(xué)，要么學(xué)生物，因?yàn)檫@兩個(gè)都是我最喜歡的科目。Yougostay.Don'tjustwanderheredoingnothing.你要么走，要么留。不要在這兒走來走去無所事事。[知識(shí)拓展]either...or...主要用于表示選擇，其意為“要么……要么……”“或者……或者……”，用于連接兩個(gè)性質(zhì)相同的詞或短語；連接兩個(gè)成分作主語時(shí)，謂語動(dòng)詞通常與其靠近的主語保持一致。除可連接兩個(gè)詞或短語外，有時(shí)也可連接兩個(gè)句子。其否定式可以是noteither...or...，也可以是neither...nor...。語法精講語法精講過去將來時(shí)[觀察例句]1．IknewJuliewouldmakedinner.2．IknewJohnwouldfinishtheworkby5：00p．m.3．WasJackgoingtowritealettertoTom?4．Wouldmysisterbuyahouseinthatcityandsettledown?[歸納用法]一、過去將來時(shí)的構(gòu)成肯定句主語＋would＋動(dòng)詞原形＋其他否定句主語＋wouldnot＋動(dòng)詞原形＋其他疑問句Would＋主語＋動(dòng)詞原形＋其他被動(dòng)句would＋be＋動(dòng)詞的過去分詞(done)二、過去將來時(shí)的用法過去將來時(shí)表示從過去某時(shí)看將要發(fā)生的動(dòng)作或存在的狀態(tài)。Ithoughthewouldn'tattendtheeveningparty，buttomysurprise，hecame.我原以為他不會(huì)參加這個(gè)晚會(huì)，但是令我驚訝的是，他來了。ItoldherIshould/wouldreturnthebookinafewdays.我告訴過她，我將在幾天后還書。三、過去將來時(shí)的表示方法1．“would/should＋動(dòng)詞原形”，would用于所有人稱，should只用于第一人稱。Shetoldusthatshewouldnotgowithus，ifitrained.她告訴我們，如果下雨的話她就不和我們一起去了。ItelephonedhimyesterdaytoaskwhatIshoulddonextweek.我昨天給他打電話問我下周做什么。2．“was/weregoingtodo”表示過去打算/計(jì)劃做某事或客觀跡象表明要發(fā)生的事。IwasgoingtoseeMr.Brownthenextday，buttheappointmentwascancelled.我本打算第二天去看布朗先生的，但預(yù)約被取消了。Ithoughtitwasgoingtorainbecausetheskywasverydark.我想是要下雨了，因?yàn)樘焐馨怠?．“was/wereabouttodo”表示過去正要/即將做某事，一般不與時(shí)間狀語連用。WhenIgottheretheywereabouttoleave.我到那兒的時(shí)候他們正要離開。4．“was/weretodo”表示過去計(jì)劃或安排將要做某事。Hesaidhewastofinishtheworkinaweek.他說他打算一星期后完成這項(xiàng)工作。Shesaidshewastotakeuptheposition.她說她要承擔(dān)這個(gè)職務(wù)。5．“was/were＋doing”表示過去將來時(shí)時(shí)，僅限于go，come，leave，start，takeoff等趨向性(短語)動(dòng)詞。Ididn'tknowtheywerecoming.我并不知道他們要來。DavidwasleavingforShanghaiinafewdays.戴維幾天以后要去上海。Ⅰ.單句語法填空1．Wewereallsurprisedwhenhemadeitclearthathe(leave)officesoon.2．—Hepromisedhe(attend)themeetingontime.Iamatalosswhathappened.—Itdoesn'tmatter.Wearestartingwithouthim.3．Justanhouragohetoldmeonthephonethathe(come)homerightafterhiswork.4．Shesaidthebus(leave)atfivethenextmorning.5．Thebusdrivertoldeverybodytogetreadybecausethebus(start)．6．Hepromisedthathe(buy)somegiftsforuswhenhegotthere.7．Iwasn'tsurewhetherLucy(come)thenextday，soIwroteheraletter.8．By2017,Iwasalready180cmtall,andIwonderedifI(grow)taller.9．Mrs.Smith(go)forworkwhenthetelephonerang.10．Shehurriedtotheentranceatwhichthecar(arrive),andlookedforwardtoseeingherhusband.Ⅱ.短文語法填空Aftergraduationfromcollege，Istartedtosell.Ithoughtit1.(be)adepressingperiodoftimebecauseIdiscoveredthattheworriedexpressionI2.(wear)sincechildhoodmeantsurefailure.Iknewit3.(become)difficulttorelievethedepressionleftbysomanyyearsofhardship.Itcalledforacompletechangeinmyviewonlife.HereisthemethodItried.Eachmorningduringafifteen-minutebath，Ideterminedtocultivateabig，happysmileandmakemyself4.(relax)．Ifoundout，however，thatitcouldn'tbeaforcedsmiledevelopedjustforthepurposeofputtingdollarsinmypocket.Ithadtobeanhonest-to-goodnesssmilefromdowndeepinside，anoutwardexpressionofhappinessfromwithin！Iwasdefinitelysurethatit5.(work)．Let'sseethestartingoffwithagoodfifteen-minutetrainingofthesmilemuscleshelpedmeduringtheday.BeforeenteringanofficeI6.(think)ofmanythingsIhadtobethankfulfor，workupacharmingsmileandthenentered.Seldomdiditfailtogetthesamesmile7.returnfromthepersonImet.IalsofoundthatitpleasedpeoplewhenIpassedthemonthestreettogivethemacheerfulsmile.Giveeverylivingsoulyoumeetthebestsmileyouhaveeversmiledinyourlife，8.seehowmuchbetteryoufeelandlook.It'soneofthebest9.(way)Iknowtostopworrying，andstartliving.WhenIbegandoingthis，Ifound10.(me)morewelcomeeverywhere.寫作園地寫作園地如何寫探險(xiǎn)類記敘文本單元的寫作項(xiàng)目是描述一次探險(xiǎn)或者冒險(xiǎn)經(jīng)歷，屬于記敘文文體。記敘文有六大要素：時(shí)間、地點(diǎn)、人物、事件的起因、經(jīng)過和結(jié)果。探險(xiǎn)類文章需要注意重點(diǎn)要放在“探險(xiǎn)”上；主人公是有意識(shí)地去做的，而不是偶然或者意外發(fā)生的事情。另外需要體現(xiàn)探險(xiǎn)的意義所在，讀過之后能讓讀者有所啟發(fā)。通常用過去相關(guān)的時(shí)態(tài)。在文章里要寫出自己做了什么，自己看見了什么，以及自己的感受。[基本框架]1．開頭(beginning)——交代探險(xiǎn)發(fā)生的時(shí)間、地點(diǎn)以及內(nèi)容；2．主體(body)——詳細(xì)說明探險(xiǎn)的經(jīng)過或過程；3．結(jié)尾(ending)——寫出對(duì)探險(xiǎn)的評(píng)價(jià)以及自己的感受。[常用詞塊]1．savetheearth拯救地球2．takethetimemachine乘坐時(shí)光機(jī)3．flypastthestars飛過星球4．betransformedintoaninsect變成了昆蟲5．beeatenbyamonster被怪物吃掉[常用語句]★精彩開頭1．Whenitcomestotheadventurestory，theMagicSchoolBuscameintomymindfirst.一說到冒險(xiǎn)故事，我首先想到的就是《神奇校車》。2．Speakingoftheadventure，Iexperiencedoncethreeyearsago.說起冒險(xiǎn)，我三年前經(jīng)歷了一次。3．Ifyouwanttoexperiencethetravelinspace,let'sreadthefollowingstorytogether.如果你想感受太空旅行，我們一起來讀讀下面的故事吧?！镎募丫?．Weflewthroughthetunnelandgotintothetimemachine.我們飛躍隧道，進(jìn)入了時(shí)光機(jī)器。2．Iwasswimmingintheseawhenabigsharkappearedseveralmetersawayfromme.我正在海里游泳，突然一條大鯊魚出現(xiàn)在離我?guī)酌走h(yuǎn)的地方。3．Theyjumpedintothetreeholeandthenshrankintoalittlemanofthesamesizeasamouse.他們跳入樹洞，然后縮成了像一只老鼠大小的小人。★余味結(jié)尾1．Thelittlegirlcametoherselfandfoundshewasstillsleepingunderthetree.小姑娘蘇醒過來，發(fā)現(xiàn)自己依然睡在樹底下。2．TillnowIstillfeelfrightenedatthethoughtofthatadventure.直到現(xiàn)在，一想起那次冒險(xiǎn)我依然感到恐懼。3．Theherointhemoviesavedthepeopleintroubleandtaughtmetobekindandhelpfultopeoplearoundme.電影中的男主角拯救了苦難中的人們，教會(huì)我要對(duì)周圍的人善良，要樂于幫助他們。例文練習(xí)你是新華中學(xué)的學(xué)生李華，今年暑假和父母去了夏威夷。期間經(jīng)歷了人生第一次潛水探險(xiǎn)。請(qǐng)以日記的形式描述自己的這一次冒險(xiǎn)經(jīng)歷，并寫出從中自己的所思所想所獲。1．潛水地點(diǎn)是普普克阿海灘公園(PupukeaBeachPark)；2．我剛開始聽說這里有時(shí)會(huì)出現(xiàn)鯊魚，有點(diǎn)擔(dān)心，但因?yàn)樗鼈円话悴粫?huì)主動(dòng)攻擊人類，我嘗試下水；3．這里是一個(gè)海洋生物保護(hù)區(qū)，海里的魚類非常豐富，還有海龜；4．因?yàn)楹＠锶墙甘枰⒁獍踩?．建議想要去的朋友最好選擇每年的夏季，海面平靜且海浪很小的最佳浮潛季節(jié)。要求：1.詞數(shù)80左右；2．內(nèi)容積極向上，可適當(dāng)增添細(xì)節(jié)以使行文流暢。分層提分分層提分題組A基礎(chǔ)過關(guān)練Ⅰ.單詞拼寫(根據(jù)漢語提示或首字母提示寫單詞)1．Maryenjoyedfeelingthewarmsand(在……之下)herfeet.2．Onlywhenyouwalkoutofyourcomfortcanyousucceed.3．Theexercisesaredesignedto(拉伸)andtoneyourlegmuscles.4．Seeinghisgoodfriends，hegreetedthemwithawaveandasmile.5．Itisour(最初的)plantosetupanorganizationtohelpthedisabled.6．Beforehedied，hehadalargequantityofalcohol.7．Inthe(擁擠的)city，myfatherpreferswalkingtotakingabus.8．Ineedtohireanew(仆人)，becausethelastonewasnotgoodenough.9．AsfarasIamconcerned，itishardtojudgethe(界限)betweenloveandfriendship.10．Theforeignermadeantomakehimselfunderstoodbythelocalpeople，butfailed.Ⅱ.詞形變化填空(用括號(hào)內(nèi)所給詞的適當(dāng)形式填空)1．Stopdoingit，oryou’lldoyourselfan(injure)．2．Determiningwhereweareinrelationtoour(surround)remainsanessentialskillforoursurvival.3．Ifeltgreatly(thrill)whenImetmyfavoriteauthorinperson.4．Istronglybelieveyoucandealwiththe(relate)betweenstudyandrelaxation.5．Ihad(initial)hopedthatIcouldbecomeawriterwritingsciencefictions.6．Toour(astonish)，hedidn’tworkhardertoovercomehisshortcomings.題組B能力提升練Asthecoronavirusoutbreakcontinues，manyAmericansarefearfulofusingpublictransportation.Theyarealsolookingforwaystogetexercisewithouthavingtogotoagym，aswellaswaystoenjoytheoutdoors.1IntheUnitedStates，bicyclesatbigstoreslikeWalmarthavesoldout.Andsmallbicyclestorescannotkeepupwithdemandfor“family-style”bicycles：thelow-cost，easy-to-ridemodels.Thebicycleindustryisseeingitsbiggestsalesincreasesincetheoilcrisisofthe1970s.TheincreaseinbicycledemandbeganinMarchascountriesbegantoclosedown.2Allbicyclesales，includingthoseforchildren，areup100percentfromtheyearbefore.3CitieslikeManilainthePhilippinesandRome，Italyhavecreatedbicyclepathsforthegrowingnumberofpeoplewhowanttoavoidpublictransportation.InLondon，cityofficialsplantobarcarsfromsomecentralroads.Ofcourse，youcanonlybuyabicycleifyoucanfindonebicycle.IntheU．S.，theshortagesnowmeanitmaytakemanymonthstogetone.4TheU．S.buys90percentofitsbicyclesfromChina.BicyclefactoriestherewereshutdowntostopthespreadofCOVID-19.InBarHarbor，Maine，BrianSmithboughtanewbicycleforoneofhisdaughters.Sheisacompetitiveswimmerwhocouldnotgettothepooltopractice.Hisfamilynowgoesforridesseveraltimesaday.Bicyclinghelpsthemallgetexerciseandenjoythefreshair.5“It’sfun.Maybethat’sthebottomline.It’sreallyfuntoridebikes，”Smithsaid.A．Butwhat’sthebiggestreasonwhytheygoonrides?B．Highdemandisnottheonlyreasonfortheshortage.C．Thenwhohasbenefitedgreatestfromridingbikes?D．TheriseinbicyclesalesisnothappeningjustintheUnitedStates.E．InApril，thesaleofbicyclesforadultsincreased200percentintheUnitedStates.F．However，nobicycleshavebeenimportedfromabroadlikeChinasincetheendoflastyear.G．So，itmaynotbesurprisingthatthepandemic(流行病)hasledtoamajorincreaseinbicyclesales.題組C培優(yōu)拔尖練AClassifyingthingsiscriticalforourdailylives.Forexample，wehavetodetectspammails(垃圾郵件)，falsepoliticalnews.WhenweuseAI，suchtasksarebasedon“classificationtechnology”inmachinelearning—havingthecomputerlearn，usingtheboundaryseparatingpositiveandnegativedata.Forexample，“positive”datawouldbephotosincludingahappyface，and“negative”dataphotosthatincludeasadface.Onceaclassificationboundaryislearned，thecomputercandeterminewhetheracertaindataispositiveornegative.However，thedifficultywiththistechnologyisthatitrequiresbothpositiveandnegativedataforthelearningprocess，andnegativedataarenotavailableinmanycases.Forinstance，whenaretailer(零售商)istryingtopredictwhowillmakeapurchase，theycaneasilyfinddataoncustomerswhohavepurchasedfromthem(positivedata)，butitisbasicallyimpossibletoobtaindataoncustomerswhohaveneverpurchasedfromthem(negativedata)，sincetheydonothaveaccesstotheircompetitors’data.AccordingtoleadauthorTakashiIshidafromRIKENAIP，“Previousclassificationmethodscouldnotcopewiththesituationwherenegativedatawerenotavailable，butwehavemadeitpossibleforcomputerstolearnwithonlypositivedata，aslongaswehaveaconfidencescoreforourpositivedata，constructedfrominformationsuchasbuyingintentionortheactiverateofappusers.Usingournewmethod，wecanletcomputerslearnaclassifieronlyfrompositivedataequippedwithconfidence.”AccordingtoIshida，“Thisdiscoverycouldexpandtherangeofapplicationswhereclassificationtechnologycanbeused.Eveninfieldswheremachinelearninghasbeenactivelyused，ourclassificationtechnologycouldbeusedinnewsituationswhereonlypositivedatacanbegatheredduetodataregulationorbusinessconstraints(限制)．Inthenearfuture，wehopetoputourtechnologytouseinvariousresearchfields，suchasnaturallanguageprocessing，computervision，robotics，andbioinformatics.”1．Howcanthecomputerdistinguishthepositivedatafromthenegativedata?A．Bylearningtheclassificationboundary.B．Byupdatingthedatacollectedregularly.C．Byseparatinghappyfacesandsadones.D．Byintroducingclassificationtechnology.2．WhyistheexamplementionedinParagraph2?A．Toprovehowimportantthepositivedataare.B．Toconfirmthatdataoncustomersarecomplete.C．Toarguethatretailersgettheircompetitors’data.D．Toexplainwhynegativedataarehardtoacquire.3．Whatdotheunderlinedwords“newmethod”inParagraph3referto?A．Analyzingbuyingintention.B．Buildingaconfidencescore.C．Assessingtheactiverateofappusers.D．Equippingthecomputerwithconfidence.4．Whatcanbeasuitabletitleforthetext?A．TheHistoryofClassificationTechnologyB．SmarterAI：MachineLearningWithoutNegativeDataC．BiggerData：ComputersAssistingLanguageProcessingD．TheComparisonBetweenPositiveDataandNegativeDataBStudentloan(貸款)debthasbecomeaworldwideproblem.InAmerica，thecountry’soverallstudentdebtreachedarecordof$1.6trillionin2019.Theaveragepersonwithstudentloandebtowedbetween$20,000and$25,000.ArecentJapanesegovernmentreportsaysithasbeenlendingover$9billionyearlytostudentssince2010.SimilarconditionsexistinAfricaandSouthAmerica.Severalfactorsaccountforhighstudentloandebt.Oneisthatemployerseverywherehave