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1、2014年高考英语二轮复习阅读理解拉分题（较难题目）特训：科普知识类1FILTON,justoutsideBristol,iswhereBritain’sfleetofConcordesupersonic（超音速的）airlinerswasbuilt.There,somethingremarkableisbeingcreated.Littlebylittleamachineis“printing”acomplextitaniumbracket(钛合金支架),aboutthesizeofashoe,whichn
2、ormallywouldhavetobecutfromasolidblockofmetal.Bracketsareonlythebeginning.TheresearchersatFiltonhaveamuchbiggerambition:toprinttheentirewingofanairliner.Unrealisticasthismayseem,manyotherpeopleareusing3Dprintingtechnologytocreatesimilarlyremarkablethings.Th
3、eseincludemedicalimplants,jewellery,footballbootsdesignedforindividualfeet,lampshades,racing-carparts,solid-statebatteriesandcustomizedmobilephones.Someareevenmakingmechanicaldevices(仪器).AttheMassachusettsInstituteofTechnology(MIT),PeterSchmitt,aPhDstudent,
4、hasbeenprintingsomethingthatisliketheworkingsofagrandfatherclock.Ittookhimafewattemptstogetright,buteventuallyheremovedtheplasticclockfroma3Dprinter,hungitonthewallandpulleddownthecounterweight.Itstartedticking.Engineersanddesignershavebeenusing3Dprintersfo
5、rmorethanadecade,butmostlytomakeoriginaltypesquicklyandcheaplybeforetheyembarkontheexpensivebusinessoftoolingupafactorytoproducetherealthing.As3Dprintershavebecomemoreabletoworkwithabroaderrangeofmaterials,includingproduction-gradeplasticsandmetals,themachi
6、nesareincreasinglybeingusedtomakefinalproductstoo.Morethan20%oftheoutputof3Dprintersisnowfinalproductsratherthanoriginaltypes,accordingtoTerryWohlers,whorunsaresearchfirmspecializinginthefield.Hepredictsthatthiswillriseto50%by2020.72.Whichofthefollowingistr
7、ueaccordingtothepassage?A.FiltonisinthecentreofBristol.B.Petertriedtoprintaclock,butinvain.C.aremarkablemetalbracketisbeingcreated.D.3Dprintingtechnologyisavailabletoallofus.73.Theunderlinedword“embark”probablymeans“_________”.A.work B.land C.depend
8、 D.fix74.Wecanconcludefromthelastparagraphthat__________.A.TerryWohlers’sfirmwillmakegreatprofitsB.thetechnologyof3DprinterswillbewidelyadoptedC.3Dprintershavebeeninuseforatleast100yearsD.engineersand
