2020年高考英语阅读理解文章结构题专练附答

2020年高考英语阅读理解文章结构题专练（附答案）

一、阅读理解共10题；共82分I.阅读理解“Is thereanything elseyou need,honey”my dadasked meas heput threetwenty-dollar billsin myhand.I wastraveling backhome from a familyvisit,and aftertreating meto breakfastand fillingmy carwith gas,it wasobvious thatmy dadwanted to make surethat Iwould beokay on the road.“No,Dad.Youve doneso muchalready.Thank you!”I wasoverwhelmed onceagain byhis kindacts ofproviding everythingI needed,despite thefact Ijust turned

40.Yet Irealize thatin myfathers eyes,I willalways behis littlegirl.He takesdeep pleasurein knowinghis childrenare allright.Now thathe hasenough money,he loves to givewhenever hesees aneed.But thiswas notalways thecase.Divorced frommy motherwhen Iwas11,my dadcouldnt be around hiskids asoften ashe wouldhave liked.Money was also tight;even weekendvisits wererare.However,my dadstayed inconstant communicationwith us and madesure he was involved in our lives.Though he couldnt alwaysbe herein person,I knewhewasonly aphone callaway.I couldalways counton that.Even now,almost30years later,I treasureknowing thatI canpick upthe phoneand callDad,and hellbe therefor me.I have a wonderfulhusband,but thathasnt changedhow Dadsees me.Im stillhis childand helovesto see thatmy needsare met.I remembera time when Iwas shoppingin ahardware store五金店with Dad.I mentionedmy plansto paintone wall in myhouse.Well,thats allit tookfor Dad to takeaction.By thetime Igot to the checkout结账line,all thesupplies Ipicked outwere putout ofmy handsand placedwith thingshe bought.Then therewas thetimewhen1took himwith meto dosome groceryshopping forjust afew“items”.By thetime wewere finished,my shoppingcart wasfull ofgroceries fromevery shelfin thestore!My sisterand Ijoke that if youdont wantDadtobuy it for you,avoid evenmentioning you want something.1Whats the best title for the passage A.Fathers consideratelove B.Fathers generosityC.The lovefor childrenD.Loves power2The authordemonstrates her fathers lovefor hermainly by.A.examples B.reasoning C.persuasion D.argument3Which of the followingis notTRUE A.The authorsfather wasdivorced whenshe was

11.B.Now thefathers economiccondition issatisfying.C.The fatherhas a great sense of responsibility.D.After the author gotmarried,herfatherno longerget himselfinvolvedin her life.4The authors1two shoppingexperiences withfather show.A.father paidlittle attentionto moneyB.father wasquick in action C.father paidgreat attentionto hischildrens needsD.father lovedgoing shoppingvery much

2.根据短文理解，选择正确答案Last year,though,saw abig change in the3D printingindustry—printers becamemuch cheaper.For example,10years agoa desktop3D printermight havecost£20,000,while nowthey costonly about£1,000,according to the BBC.Taken outof thefactory andintroduced tomore diverseand commonuses,3D printingcan createjust about anything you can thinkof-flutes,bikinis,jewelry,aircraft pailsand evenhuman organs.In fact,scientists fromCornell Universityin NewYork havejust madean artificialear usinga3D printer,according toScience Daily.The fakeear looksand actsexactly likea naturalone.However,as3D printingbecomes morecommon,it maybring aboutcertain problems—such aspiracy.Once you can downloada coffeemaker,or printout anew setof kitchenutensils餐具on yourpersonal3D printer,who willvisit aretail storeagain”an expertin3D printingtold ForbesNews.Even morefrightening,what ifanyone in the worldcould usea3D printerto printoutafully functioninggun1According tothe article,in thefuture,the3D printingtechnology will.A.enable people to makebetter purchasesonline B.change the way wemake manyproducts C.be appliedas widelyin ourdaily lifeas computersD.shorten thetime ittakes forpeopleto get what they buyonline2What happened in the3D printingindustry lastyear A.The3D printingtechnology wastaken outof thefactory.B.The3D printingtechnology beganto beused in various fields.C.The3D printerwas usedfor medicaltreatment for the first time.D.The3D printerbecame moreaffordable forconsumers.3What is the besttitle of the passage A.Great Demandfor3D PrintersB.Technology in the FutureC.Online ShoppingDisappearing D.Printing outEverything4How isthe lastparagraph developed,；A.By giving examples.B.By makingcomparisons.C.By analyzingthe cause and effect.D.By presentingresearch findings.答案

1.1A2A3D4C

2.1A2B3A4D

3.1C2C3D4C

5.1C2D3A4A

4.1C2B3A4D

7.1D2B3A4A5A

6.1A2B3D4A

9.1B2C3B4A

8.1A2B3A4B

10.1B2D3D4A Myhusband and I are saving thousands of dollarsevery yearby growingour ownvegetables inour backyard.We learnsomething newevery yearand thiswebsite has been madeto sharelips withother people that wouldlike to grow someof their own food.Its truethatif you arestarting fromfresh,it willcost alittle bitof moneyto getstarted.However,once everythingis seup,the costis verysmall and the rewardsare huge.The sizeof yourfamily and how manyvegetables youeat determineexactly how much moneyyou cansave everyyear.We doa lolof juicing,so wearesavingthousandsofdollars bygrowing somecarefully selectedgreens.There is an amazingsenseof accomplishment whenyou growyour ownvegetables.Vegetables outof your vegetable gardendont getany fresher,tastier ormore satisfying.The wholefamily canget involvedin thishobby andkids willlearn wherefood comesfrom andappreciate natureeven more.Our approachto vegetable gardening iscompletely differentfrom thenormal one.We aredoing itin thelazy waywith zerodigging andfertilizing施J肥.The waywc growour vegetablesis toemulate naturalecosystems.No rowsof carrotscan befound inour gardenbeds.Rain forestsseem to do justfine withouthuman interference干预or havingplants sownin rows,so wchave appliedthe sameprinciple toourvegetablegarden andwc careproducing morevegetables thanever.By copyingnature wespend littletime workingin thevegetablegardenbut gela muchbetter cropthan previousyears whenwe followedthe rules.What canI sayWere suchrebels」叛逆者1What doesthe authorthink aboutpeople growingtheir ownvegetables A.It isa rewardingactivity.B.It iscostly in the beginning.C.People shoulddevote manyefforts.D.People shouldshare theirtips.2What doesthe underlinedword“emulate”in paragraph4mean A.Create.B.Imiiale模仿.C.Protect D.Improve.3Why doesthe authorcall herand herhusband rebels”A.They useunconventional waystogrow vegetables.B.They dontbuy vegetablesfrom themarket.C.They eventry togrowvegetablesintherain forests.D.They dontgrow ordinaryvegetables.4Which ofhe followingshows thestructure of the textP:Paragraph

3.阅读理解Have youever felllike youare notgiven thekind ofrespect youdeserve Inone wayor another,all ofus havefelt this way.Weve yearned渴望to belooked atas an authority,someone peoplelook up to andtrust.Were nottaught inschool how to dothis andour parentsdidnt tellus thesecret onhowtoestablish ourauthority.Its somethingwe learnand gainby ourselves.And theanswer isas simpleas changingour mindset.What Noway!Oh but it is.People tendto underestimatethe power of the mind.Change yourgame bychanging yourmind.Take timeto lookback andthink aboutpeople inyour lifewho arcan authorityor aleader atwork,who hasmore credibilily可彳言J支than youor whoyou lookup to and inspiresyou.They areup therenot forthe reasonsyou think,ifyoureally thinkabout it,they arentthe smartestof thebunch,not the most educated,and neitherare theythe best.And inno waydo theyeven call themselves an expert.Instead,they areup therebecause they are greatteachers andadvocates支持者forthesuccess of their customersor employees.Lets takeRichard Simmonsfor example.This famousfitness personalityhas beena householdname eversince hestarted gainingpopularity duringthe firstfew yearsof hiscareer.Stop andthink,though,do youreally thinkhe isthe bestperson toreally getpeople intoshape Ishe theEinstein offitness andnutrition Ordoes heeven callhimself amaster of his craftOf coursenot.People lookup tohim andgive himauthority becausehe isa greateducator.Instead ofsharing informationthats fartoo complicatedto understand,he figuresout whatyour problemsare andfinds outa wayto fixhem.He evenhas social media thathe updateson aregular basiswith topicsthat arehelpful andeasy to understand forhis fans and followers.Depending onhe fieldyoure in,you canshare withpeople thingsyou know and hatyou thinkthey will want toknow aswell.If yourea nurse,for example,you canmake ablog postfor commonhealth problemsand quickremedies治疗方法people cando athome.Remember,the simpleryou canmake it,the better.People willtrust youcompletely ifyou givethem easysolutions.Like Richard,youll soonbe theexpert youllwant tolisten to.You can be anadvocate alsoby showingpeoplethat you havetheir bestinterests atheart.You canalso startup conferencesto takeup peoplesconcerns andtry todeal with them the best way that youcan.So,how willyou beviewed asan authorityMake thatmind shift.Find outwhat concernsand troublesyour target.Give solutions.Show that you care.And helpthem climbup thatladder ofsuccess.Ladies andgentlemen,thats how its done.1What canwe knowabout RichardSimmons A.He isas intelligentas Einstein.B.He believedhimself obeamaster offitness.C.He becamepopular inthe firstfew yearsof hiscareer.D.He sharescomplex informationwith hisfansandfollowers.2The exampleof a nurse in Paragraph4is used to tellus.A.the importanceof trustB.the pleasureof beinganurseC.the waysof becoming anauthorityD.the benefits of learningfirst aid3Which ofhe followingwould the author mostprobably agreewith A.People alwaysthink highlyof thepowerofhemind.B.You cangain theknowledge ofbecominganauthority atschool.C.People consideredas authoritiesare those with highereducation.D.Providing easysolutions forpeople canhelp increaseyour credibility.4Which ofthe followingshows thestructure ofthe passageP=paragraph

4.阅读理解Most ofus havequite goodmemories,butour memoriesare limited.For example,we cannotremember everyonewe haveevermet orwhat wedid onevery singleday of ourlives.However,there are some people who dohave prodigious inemories.These peoplehavearare conditionknown assavant syndrome学者症候群.Savants sufferfrom adevelopmental disorder,but theyalso exhibitgreat talentsthat contrast显出差异sharply with their physicaland mentaldisabilities.Kim Peek1951-2009wasasavant wholivedin SallLake City,Utah,intheUnited Stales.He wasbom withdamage toparts ofhis brain,but itseemed thatother partsofhisbrain,particularly thoserelating tomemory,became over-developed.Peeks uniqueabilities appearedat averyearly age.When hewas just20months old,hecouldalready rememberevery bookhat wasread tohim.Peek couldread twopages of a bookal the same time-one pagewiththeright eyeand onewiththeleft—in less than10seconds andremember everythinghe read.By thetime hedied,Peek hadmemorized more than9,000books.He couldremember allthe namesand numbersina varietyof telephonebooks.He couldremember thousandsof factsabout history,literature,geography andsports.Dr.David Trefieri,anexperton savantsyndrome,once describedPeek as“a livingGoogle”because ofhis astonishingability tomemorize andconnect facts.However,atthesame time,Peck wasunable tocarry outsimple tasks,such asbrushing hishair orgetting dressed,and heneeded othersto helphim.In1989,he movieRain Manwon theOscar fbrbcstPicture.The maincharacter inthe movie,played by Dustin Hoffman,wasbased onKim Peekslife.He startedto appearon television,where hewould amazeaudiences bycorrectly answeringdifficult questionson differenttopics.Peck becameworld famous,and heand hisfather begantouring widelyto talk about overcomingdisabilities.He inspiredagreatmany peoplewith hiswords.ivRecognizing andrespecting differencesin others,and treatingeveryone inthe wayyouwantthem totreat you,will makeour worlda betterplace fbrevetyone.Everyone isdifferent.”1The underlinedword“prodigious“inParagraph1probably means.A.happy B.vivid C.amazing D.short2According tothe text.Peek.A.could takecare ofhimself

8.was bornwith a good memoryC.was thestudent ofDr.David TreffertD.became brain-damaged at2months old3How isParagraph3mainly developedA.By provingfacts.B.By followingtime order.C.By analyzingcauses.D.By makingcomparisons.4Peeks wordssuggest that we should一A.respect differentcultures B.listen todifferent opinionsC.treat differentpeople differentlyD.be respectfulof othersdifferences

5.阅读理解As Ienter my40s,Ive noticedmany ofmy parentsgeneration thinksocial networkingis somethingtheyaresimply unable to understand.They fearthat,should theytry,they willsomehow get it wrong;they willsay thewrong thing,do thewrong thingor behaveinawaythatcauses embarrassment.But therearesomesecrets of social mediafor themto consider.Heres the first secret:everyone feelsthisway.I recentlymet ayoung actorwho wascomplaining thather workdemands thatshe joinMicroblog,but shealways feelslike shedoesnt haveanything smartto say.Its thesame resistance抵制.I hearfrom the older generation,who,however,have somehowbelieved thatage isthe barrierrather thanthe differencesof personaltaste.Heres thesecond secret:everybody usesitformore orless thesame reasons.Older generationsoften signup tostay in touch withchildren andrelatives.We talkabout thiskind ofcommunication likeits someold-fashioned activity,butit is exactlywhy youngerpeople use social media.The truth is thatmost peopleusesocial media togently keepan eyeon oneanother,to seehow thosethey careabout aredoing withoutneeding loring themup on the phoneevery night.And thisisthelast secret:everyone getsto usehem intheir ownway.Newcomers—younger andolder-who worryabout“getting itright^^arc thinkingthat thcre*saright waytogetthem.But actuallythere isnt.Personally,1talkalot onMicroblog.And somepeople postnothing and they usesocial mediaevery dayas readers.Social mediacompanies wouldrather seepeople decoratingtheir networkswith picturesand posts,but theresno ruleagainst beinga flyonthewall.Ils alsoa fineway loget involved.Were quickto forgetthat theweb wasntinvented by13-ycar-olds;it wascreated bytodays seniors.Id neverry forcingthose withno interest in socialnetworks touse Microblog.But dontlet thetalk ofage dividespul youoff.Theres nothingto stopthe oldergeneration fromjoining inthe networktheirowngeneration created.1Whats theauthors purposeof writingthis passageA.To sharewith ushis personalexperience using social media.B.To explainwhy theold generationdont usesocial media.C.To freetheoldgeneration fromfearing usingsocialmedia.D.To tellus afew secretsofsocialmedia thathe discovered.2The expression“a flyonthewallinthe4th paragraphrefers to.A.people whoprefer readingonline booksB.people whocause troubleto othersC.people whopost manyfancy picturesD.peoplewhosimply observeothers posts3According totheauthor,which isa reasonfor oldpeoples fearusingsocialmedia A.They believethey maybe trappedin embarrassingsituations.B.They haveno particularinterestinsocial networking.C.They preferstaying intouch withrelatives inreal life.D.They haveno ideawhich contentsto postonline.4Which ofthe followingmay bestdescribe thestructure ofthis passage

6.阅读理解Last week,my granddaughterstarted kindergarten,and Iwished herevery success.But partof medidnt.I actuallywanted her to failin someways becauseI believe that failurecan begood forour learningprocess.Success isproving thatyoucando somethingthatyoualready knowyoucando,or doingsomething correctlythefirstlime,which canoften bea problematicvictory.First-time successis usuallya luck.First-time failure,however,is supposedto be the naturalorder ofthings.Failure ishow we learn.In Africathey describeagoodcook as“she whohas brokenmany pots^^.If youvespent enoughtime inthe kitchento havebroken alot ofpots,probably youknowafair amountabout cooking.I oncehad dinnerwith agroup ofcooks,and heyspent timecomparing knifewounds andbum scars.They knewhowmuchiheir failuresgave them.I earnmy livingby writinga dailynewspaper column.Each weekI knowthat onecolumn Iwrite isgoing to betheworst column.I trymy bestevery day.I havelearned tolove thatcolumn.A successfulcolumn usuallymeans thatI amdiscussing myfamiliar topic,writing ina styleI amusedtoor sayingthesamethings asanyone elsebut ina betterway.My youngerdaughter isa trapezeartist荡秋千演员.She spentthree yearspracticing ashow,and she did itsuccessfully foryears.There wasno reasonfor herto changeit butshedidanyway.She saidshe wasno longerlearning anythingnew andshe wasbored.She riskedfailure andgreat publicembarrassment inorder tofeed hersoul.My granddaughterisaperfectionist.She willfeel herfailures,andIwillwantto comforther.But Iwill also,I hope,remind herof whatshe learned,andhowshe cando betternext time.1Why didtheauthorwant hisgranddaughter tofail A.She wouldlearn morefrom failure.B.He wantedherto be strongenough toface hardships.C.Its impossibletodoeverything successfully.D.Success isboring thoughgood.2The writertalked abouthis ownexperience toshow that.A.we shouldry everypossible wayto avoidfailure B.the thoughtof failurewill makehim workeven harderC.past failuresmade himdare nottake risksin writingD.we cannotdepend onluck to live agood life3Whats theauthors attitudetoward hisdaughter changingher showA.Negative.B.Worried.C.Anxious.D.Positive.4The authordevelops the article mainlyby.A.givingexamplesB.following thetime orderC.comparing differentopinions D.giving acauseandanalyzing itseffects

7.阅读下列短文，从给的四个选项A、B、C和D中，选出最佳选项“Plants wereexpected toget largerwith increased carbon dioxidein atmosphere,but changesin temperature,humidity andnutrient availabilityseem oirumped thebenefitsofincreasedcarbondioxide,“said researchersfrom the National University of Singapore.45percent ofthe speciesstudied nowreach smalleradult sizesthan theydid inthe past.The researcherspointed outthat warmer temperatures andchanging habitats,caused byclimate change,are possiblereasons forshrinking creatures.“We donot yetknow themechanisms involved,or whysome organismare gettingsmaller whileothers areunaffected.the researcherssaid.Until weunderstand more,we couldbe riskingnegative consequencesthatwecant yetquanlify.^^The changewas bigin cold-blooded animals.Only twodecades ofwarmer temperatureswere enoughtomakereptiles smaller.An increaseof1degree centigradecaused nearlya10percent increasein metabolism新陈代谢.Greater useof energyresulted intiny tortoisesand littlelizards.Fish aresmaller nowtoo.Though overfishinghas playeda partin reducingnumbers,experiments showthat wannertemperatures alsostop fishgrowth.There isa recentreport onwarmertemperaturesnegative effectson plankton,the baseofthemarine ecosystem.Warm-blooded animalswerent immunefrom hesize change caused byclimate change.Many birdsare nowsmaller.Mammals have been miniaturizedtoo.Soay sheepare thinner.Red deerare weaker.And polarbears aresmaller,compared withhistorical records.This is not thefirsttimethis hashappenedin Earths history.55million yearsago,a wanningevent similartothe current climate changecausedbees,spiders andants toshrink by50to75percent overseveral thousandyears.That eventhappened overa longtime thanthecurrentclimate change.The speedof modernclimate changecould meanorganisms maynot respondor adaptquickly enough,especially thosewith longgeneration times.So,itislikely thatmore negativeinfluences of climatechangewill beshown infuture.1Which ofthe followingwould bethebesttitleforthe passageA.Why dosome speciesbecome smallerB.How docstemperature changeinEarthshistory C.Climate changehas manynegative effectsD.Species become smaller asclimate warms2The underlinedword“trumped”inthefirst paragraphcan bereplaced by.A.been neglectedby B.had stronginfluences thanC.been weakenedbyD.been lessthan3Researchers from theNationalUniversityofSingapore believethat.A.how climatechange effectsanimals sizehas notbeen foundclearly B.alltheanimals onthe earthhave becomesmaller C.too manystudies onanimals sizehavebeendone D.people canavoid thenegative effectsofclimatechange4What canwelearnfrom thepassageA.Climate changehas evenaffected planktonnegatively.B.Birds havesuffered morefrom climatechange thanfish.C.Ants,bees andspiders havebeen shrinkingby50%to70%inhepast decade.D.A warmingevent causingspecies tobecomesmallerhas neverhappened before.5Whats theauthors attitudetoward climatechangeinthepassageA.Concerned.B.Optimistic.C.Indifferent.D.Confident.

8.阅读理解“Image iseverything/An entireindustry hasbeen builtupon theconcept that image iseverything,but anappealing image isnt enoughwhen theresno substancebehind it.First ofall,one shouldconsider howimportant image is inselling productsand services.Advertising agencieshave raisedtheartof creatingan imagetoaslate ofnear perfection.But ifthe product or servicedoesnt liveup toit,customers will be verydissatisfied.The recentscandal（丑闻）about theArthur Andersenaccounting firmshowed thatbehind（hatimage,it hadunfair businesspractices underthe table.Despite theprevious positiveimage,the firmis beingaccused ofcriminal actions.Although theimage hadbeen nearlyperfect,the realitybehind theimage hasled toits downfall.Similarly,personal consultants（顾问）can buildup avery positivepublic imagefor politiciansand moviestars inthe viewofthegeneral commons.But onceagain,history isfilled withexamples ofboih thatfell from grace（体面）like thestory ofthe Hollywoodactor givingintothe pressuresof fameand fortune.With people,just aswith productsand services,image iscertainly important,but withoutpositive substancebehind it,failure isclose.To conclude,its clearthat anappealing image is extremelyimportant to success,whether that imageisrelated toselling aproductorservice ortothe“selling”ofaperson.But imageis onlyhalf ofthe equation（等式）.What liesbehind thatimageisevery bitas importantas theimage itself—the personor productmust liveup tothatimageor thereslittle chancefor long-term success.

（1）The downfalloftheArthur Andersenaccounting firmis dueto.A.its dishonestyin businessB.its badmanagement C.its previousimages D.its poorservice

（2）Some famouspeople fallfromgracebecause.A.their imageswere notwell builtup B.they failedtoliveuptotheir imagesC.they feltmuch pressurefromthe publicD.they paidlittle attentionto fameand fortune

（3）_________________________________The structureofthepassage isprobably.A.imageisthe basisof everythingB.truth andimage areequally importantC.（ruth goeshand inhand withimage D.image holds（he keytosuccess

9.阅读理解IPhone ownersarc vainer（虚荣）and spendmore onclothes andgrooming（仪容）than thosewho haveBlackBcrrys andAndroid phones,new researchclaims.BlackBerry ownerscam the most andare morelikely to have long-term relationships,while peoplewith Androidhandsets are most creativeand thebest cooks.The study,carried outby TalkTalkMobile,surveyed2,000owners ofthe threemajor smartphonebrands todetermine whetherthe choiceof handsetwas anextension（延伸）of theirpersonality.The studyrated usersinvariouswalks oflife usinga pointscoring systemincluding personalities,daily habitsandthetype ofindustries theywork in.Other resultsfrom thestudy foundthat peoplewith aniPhone arcmore image conscious andgenerally considerthemselves moreattractive thanthosewithother handsets.They aremost likely to describethemselves asadventurous,bright andaremostlikelytowork inmedia,publishing andeducation.They alsobelieve theirboss ratesthem highly.Apple ownersalso tendtohavedone moretravelling andare the most activeon socialmedia sites.BlackBerry ownerswere found tobethe leastpunctual准时的，but despiteputting inthe leasthours atwork theyare themost activephone user—sending moretexts andmaking morecalls inthe averageday than any other phone user.They are more socialand havemore friendsoverall.They alsoearn nearlytwo anda halfthousand poundsa yearmorethanother smartphoneowners,with anaverage salaryof$27,

406.BlackBerry usersclassed themselvesso loudand mainlywork inthe health,finance orproperty sectors.They werealso foundto drinkmore teaand coffeeeach daythananyotherphoneuser.Android ownerswere foundto watchmore TVthan othersand drinkthemostalcohol-consuming morein anaverage weekthan iPhoneand BlackBerrydrinkers.They havethemostjobs inengineering,the governmentand publicservices andenvironmental services.They havethebestmanners andaremoreshy andrelaxed thantheir counterparts.Dan Meader,Director ofMobile atTalkTalk,saidJMany ofus haveour mobile phones onus almostconstantly sothey dobecome anextension ofusinmany ways.Its interestingtoseethen howthe choicein handsetmay reflectdifferent aspectsof personalityandtheresults doshow sonicunusual difference1The underlinedwords“imageconscious^^Paragraph4mean caringabout.A.income B.appearance C.socialmediaD.interpersonal relationships2What wereAndroid usersfoundtobe likeA.Loud.B.Brave.C.Polite.D.Confident.3Dan Meadermay agreethat thekind ofmobilephonewe use..A.will decidethewaywe liveour lifeB.canbea windowinto thelives welead C.can changeour personalitiesgradually D.has becomethemostimportant partofourlife4How isthe textorganized A.By drawingcomparisons.B.By givingreasons only.C.By providingexamples.D.By givingsolutions.

10.阅读理解See acellphone coverthatyoulike onTaobao Forgetabout placingan order,paying thebill onlineand waitingfor daysfor ittobedelivered toyou.In thenear future,youll beabletogetitin minutesjust byhitting“print onyour computer.You mightfind ithard tobelievethatyou couldactually“print anobject likeyou woulda picture.But itisnotthat hardtounderstandhowitwould work.Just asa traditionalprinter spraysink ontopaper lineby line,modem3D printersspread materialonto asurface layerby layer,fromthebottom tothe top,gradually buildingup ashape.Instead ofink,the materialsthe3D printeruses aremainly plastic,resin树脂and certainmetals.The thinnereach layeris—fromamillimetre tolessthanthe widthofahair—the smootherand finerthe objectwillbe.This maysound likea completelynew technology,but thetruthisthat3D printinghasbeenaround sincethe late1980s.Back then,it wasbarely affordablefor mostpeople,so fewknew aboutit.。