Unit-4-单元话题阅读理解练习(牛津译林版2020)

Unit4单元话题阅读理解练习(名校最新真题)（2022·江苏南京·高二开学考试）WhenSpaceX’s20thmissionliftedofftotheInternationalSpaceStation,beatingheartcellswerealongfortheride.After22days,theheartcellswerereturnedtoEarth-andtheywerestillbeating.ThisexperimentmarksasignificantsteptowardhelpingheartpatientsonEarthinthefuture.Thebeatingheartcells,calledcardiomyocytes(心肌细胞),weregrownfromstemcells.“They’relikemagiccellsbecausetheycanturnintoalmostallkindsofcellsinourbody,includingbeatingheartcells.Theheartcellshavethepotentialtotreatheartdiseaseforkidsandadults.Buttorepairadamagedheart,wewillneedalotmorecardiomyocytes.Andsometimesit’sreallyhardtogetthatmanycellstogrow,”

saidChunhuiXu,researcherandassociateprofessorofpediatricsatEmoryUniversitySchoolofMedicine.Whenherexperimentusingsimulatedzero-gravityonEarthshowedpromisingstepstowardquicklyandsafelyproducingcardiomyocytes,Xusawspaceastheprovingground.Her experiment

waschosentoflyonthespacestationinordertodeterminehowtheabsenceofgravityimpactsstemcellsthatareessentiallyturnedintoheartcells.Theheartcellswerefrozen,andthenthawed(解冻)oncetheyreachedthestation.Thisallowedthecellstogrowinspacefor21days.NASAastronautJessicaMeiroversawtheexperiment.“Thisone-of-a-kindplaceiswhatmakesdoingresearchontheInternationalSpaceStationsoincrediblyspecial.Wecantestthingsthatwecan’tdoanywhereonEarth,”Meirsaid.WhentheselivecellsreturnedtoEarth,Xuandhercolleaguesdiscoveredthatthestemcellsgrowfasterinzerogravity.Thisrapidabilitytogrowcardiomyocytescouldgeneratealargenumberofhealthyheartcellsforchildrenandadultswithvariousheartdiseases.Withthesenewfindings,theresearchcouldleadamoreefficientandcost-effectivewaytodeveloptheheartcellsonEarthforpatientsinneed.Thecellshavegreatpotentialtotreatchildrenandadults.Andthecellscouldalsobeusedtotestnewtherapiesandspeedupthedevelopmentofsafedrugs,Xusaid.1．WhatcanweknowabouttheexperimentconductedintheInternationalSpaceStation?A．Itlasted20daysinspace. B．Itfoundacureforheartattacks.C．ItwaswatchedoverbyChunhuiXu. D．Itmeansalottoheartpatientsonearth.2．WhydidChunhuiXusendherexperimenttospace?A．Totryhearttransplantinspace.B．Totestawaytospeedupstemcellgrowth.C．Tounderstandhowhumanheartschangeinspace.D．Tostudytheeffectsofmicrogravityonbraincells.3．WhatdidXuandhercolleaguesfind?A．It’sreallyhardtogetstemcellstogrowonthespacestation.B．Theheartcellswereeasytofrozeandthawonthespacestation.C．Zerogravityisidealforstemcellstogrow.D．Itiscostlytogrowstemcells.4．Whatcanthenewfindingscontributeto?A．Testnoveltreatments B．EliminatedrugtradeC．Cureallheartdiseases D．developtheheatcellsinasaferway（2022·江苏徐州第一中学高二阶段练习）Readingonthego*FReaderAstandardreadingappforeBooksandaudiobooks,FReadersupportsavarietyofformats.Theprogramisverypleasanttotheeyeandisadjustabletovariousspectrums(光谱).Apartfrombeingareadingapp,FReaderhasanintegratedtranslatorforfivelanguages(English,Russian,German,French,andUkrainian),makingtheappattractivetopeopleacrosstheworld.Youcanalsoselectasectionofthepageyouarereadingandshareitviasocialnetworks,Bluetooth,SMSandothermethods.*AlReaderAlthoughitcanreadeverytypeofbook,AlReaderisspeciallydesignedforSci-Filovers.Theappdoesn’tsupportiOSbutyoucanopenmanybookformatsonyourAndroidphone.Thisapphasenhancedgraphical(图解的)featuresandawiderangeofcustomizationoptionsthatfocusonprovidingthebestqualityforfictionalbookreading.*NookNookisstronglyintegratedwiththeonlinestoreBanes&Noble,whereyoucanfindoveramillionfreebooksontheirwebsiteorpurchasenewtitlesforthepriceofaslowas$0.99.YoucanalsobuyyoueBooksanywhereandtheywillautomaticallyappearintheNooklibrary.TheappsupportsmosteBookformats.*ScribdScribdhascomealongwayfromthedocument-readingappitwasinitially.Today,itisoneofthemostfamousprogramswithoveramilliontitlesinitslibrary.Uponregistration,yougeta30-daydemoaccountthatletsyoureadallthebooksyouwantforfree!Apartfrombooks,Scribdprovidescomicbooks,audiobooksarticles,scientificstudies,courtcasesanduncommongenresthatnootherappoffers.Youcanevenpublishyourownbookonthisplatform.5．WhyisFReaderattractivetointernationalreaders?A．Itdoesn’tharmyoureyes.B．Ithasmanycustomizationoptions.C．Ithasapowerfulintegratedtranslator.D．Userscansharewhattheyreadviasocialnetworks.6．WhatcanyoudowithAlReader?A．BuySci-Fibooks. B．Enjoygreatgraphics.C．ReadonaniOSdevice. D．Publishyourownwriting.7．WherecanyoureadbooksfromBanes&Nobleforfree?A．FRcader. B．AlReader.C．Nook. D．Scribd.（2022·江苏·高二阶段练习）Housingrankshighamongthenumerouschallengesthatstillneedtobeovercomebeforehumanscancolonize(征服)Mars.Thebravepioneersthatmakethesix-monthvoyagetotheRedPlanetwillneedaplacetoliveinassoonastheyland.Whilethebestsolutionwouldbetohavethestructuresreadybeforetheygetthere,ithassofarbeenachallengegiventhatmostconstructionrobotshavenevermadeitoutofthelaboratory.Now,theremaybeabitofhopethankstoMassachusettsInstituteofTechnology’snewlyrevealedDigitalConstructionPlatform(DCP).TheDCPcomprisesadoublearmsystemthatisfittedonatrackedvehicle.Asthelargerarmmoves,thesmaller,precisionmotorroboticarmbuildsthestructurebyshootingoutthenecessaryconstructionmaterial,rangingfrominsulationfoam(绝缘泡沫)toconcrete.TheteamofresearchersledbyPh.D．StevenKeatingsaythatunlikeother3-Dprintersthatarelimitedtobuildingobjectsthatfitwithintheiroverallenclosure,DCP’sfreemovingsystemscanbeusedtoconstructstructuresofanysize.TheteamrecentlydemonstratedtheDCP’sbuildingskillsonanemptyfieldinMountainView,CA．Therobotbeganbycreatingamoldwithexpandingfoamthathardenswhendry.Itthenconstructedthebuilding,layerbylayer,usingsensorstoraiseitselfhigherasitprogressed.Thefinalproductwasasturdy“home”thathad50-footdiameterwallsanda12-foothighroofwithroomforessentialslikeelectricitywiresandwaterpipestobeinsertedinside.Evenmoreimpressive?Ittookamere14hoursto“print”!Theresearchers’nextplanistomaketheDCPsmartenoughtoanalyzetheenvironmentwherethestructureisgoingtobebuiltanddeterminethematerialdensitiesbestsuitedforthearea.However,that’snoteventhebestpart.FutureDCPmodelsaregoingtobesolar-powered,autonomous,and,mostimportantly,capableofsourcingconstructioncomponentsfromitssurroundings.Thismeanstherobotcanbesenttoremote,disaster-strickenareas,andperhapseventoMars,tobuildsheltersusingwhatevermaterialisavailable.8．Whatdowelearnfromthefirstparagraph?A．HousingpioneersonMarsisareality.B．ColonizingMarsisoutofthequestion.C．BuildingstructuresonMarsisinthetestingphases.D．FindingaliveableplaceonMarsisatoppriority.9．HowdoestheDCPdifferfromother3-Dprinters?A．Itconsumeslesstime.B．Itcomesinmoredifferentsizes.C．Itismoreenvironmentallyfriendly.D．Itcanbuildmorediversestructures.10．Whatisthethirdparagraphmainlyabout?A．ThesuccessfulcaseoftheDCP. B．TheworkingprincipleoftheDCP.C．TheinstructionsofusingtheDCP. D．ThelimitationoftheDCP’sfunction.11．WhatmightbethebiggesthighlightoffutureDCP?A．Beingpoweredbysolar.B．Buildingsheltersanywhere.C．Collectingbuildingmaterialsonsite.D．Analyzingbuildingmaterialdensities.（2022·全国·高二课时练习）Chancesareyouhaveacellphonewithininchesofyou.Cellphonesuseradiofrequency(RF)radiationtosendsignals.Radiofrequencyenergyisaformofelectromagneticradiation,whichcanbeeitherionizing(离子化的)ornon-ionizing.IonizingradiationincludesX-rays,whichhavebeenproventobeharmful,buttheevidenceisstilliffyaboutnon-ionizingrays.CNN’sDrSanjayGupta,aneurosurgeon,haslongbeenoutspokeninhisuseofaheadsetforhiscellphone.“Non-ionizingradiationwon’tdamageDNA．It’smorelikeverylowpowermicrowaves,”hesays.“Intheshortterm,theyarelikelyharmless.Butinthelongterm,itcouldbeadifferentstory.Anyway,wholikestheideaofamicrowave,evenalow-poweredone,nexttotheirheadallday?”Earlierthisyear,researchersattheUSNationalToxicologyProgram(NTP)exposedratstoRFforaboutninehoursaday,sevendaysaweek.Thestudyfoundthattheratsweremorelikelytodevelopbrainandheartcancers.Incontrast,thecontrolratswerenotexposedtoRF,andnoneofthemdevelopedanycancers.ItshouldbenotedthatthelevelsofradiationthattheratswereexposedtoweremuchhigherthanthelimitssetbytheFederalCommunicationsCommission(FCC).“Thelevelsandtimeofexposuretoradiofrequencyradiationweremuchgreaterthanwhatpeopleexperiencewitheventhehighestlevelofcellphoneuse,”theNTPsaid.ResearchersatDrexelUniversitymaybeontosomething.Theteamhascreatedananomaterial(纳米材料)madeoutofathinlayerofMXenes,whichwillprotectadevicefromelectromagneticpollution.“WebelieveMXenesaregoingtobethenextgenerationofprotectivematerialsforportable,flexibleandwearableelectronics,”saidleadauthorYuryGogotsi,Ph.D．Researcherswonderifthenextstepcanbeprotectinghumansinthesameway,butthatwillrequiremoreresearch.Inthemeantime,ifyou’reconcernedaboutradiation,theCentersforDiseaseControlandPreventionrecommendsthatyouuseaspeakerphoneorwiredheadsetasmuchaspossible.12．Whatdoestheunderlinedword“iffy”inParagraph1mostprobablymean?A．Considerable. B．Informal. C．Clear. D．Uncertain.13．Accordingtothetext,DrSanjayGuptabelievesthat_________.A．ionizingradiationisharmless B．aheadsetisamustforsmartphoneusersC．microwavesbelongtoionizingradiation D．constantexposuretoradiationisharmful14．WhatcanwelearnfromParagraph4?A．Theresearchresultmaynotapplytohumans.B．Ratscanstandhigherlevelsofradiationthanhumans.C．Theradiationfromphonespeopleusecanbeignored.D．FCCshouldadjustthelimitonionizingradiationexposure.15．WhatisParagraph5mainlyabout?A．Apotentialsolutiontoradiation. B．Apredictionoffutureelectronics.C．TheroleofMXenesinremovingradiation. D．Theconcernoverelectromagneticradiation.（2022·全国·高二课时练习）ArtificialIntelligence(AI)isalreadypartofmanyproductsusedonadailybasis,farmorethantheaverageconsumermightimagine.Whenyouplayavideoorlookforasongononeofthemanystreamingplatforms,AIcomesintoplaythankstorecommendationalgorithms(算法)thatoffercontentinlinewiththeusers’preferences,givingthemanevenbetteruserexperience.Thesamegoesforsearchengines,boththoseusedinbrowsers(浏览器)andthosefoundone-commercesites.Withoutrealisingit,andonceagainthankstothealgorithms,it’spossibletoviewresultsinlinewithprevioussearchesorpurchases.Upsellingandcross-sellingpracticesenablemarketingfunctionstosignificantlyincreasesales,asdemonstratedbytherecentresearch.It’sverylikelythatafteraconsumerbuysgardeningproductsforhislawn,hewillthenbeginseeingrecommendationsforpurchasingarobotlawnmower(割草机).Throughthisrobot,whichworksinmuchthesamewayasrobotsthatvacuumandmopthefloor,AIhasfounditswayintothehomewithouttheconsumerevenrealisingit.Theearlymodelsfoundonthemarketwerenotasadvancedasthoseavailabletoday.Forexample,theydidn’trecogniseobstaclesandtheyweren’tabletomapoutthehouseorgarden.Today,however,AIhasmadesignificantimprovementstotheproducts.Notonlyaretheyabletocompletelymapoutalltheroomsinthehouse,remembertheirsizeandfeatures,andemptythebagwhenit’sfull,buttheycanalsoidentifyareasthatgetdirtyfasterandthereforerequirecleaningmoreregularlyandwithgreatercare.AtechnologythatcombinesAIwiththeabilitytounderstandthesurroundingenvironment,suchasrecognisingthepresenceofobjects,makestheserobotsevenmoreintelligent.Productsequippedwiththistechnologyareabletoautomaticallydetectobstacleslikeshoes,stairs,clothesandfurniture.Theresultisthatthehouseiscleanedbetter.16．Whatdoestheunderlinedphrase“comesintoplay”inParagraph1mean?A．Works. B．Appears. C．Updates. D．Succeeds.17．Howdoestheauthordevelopthefourthparagraph?A．Bygivingexamples. B．Byanalysingdata.C．Bymakingcomparisons. D．Bylistingfacts.18．What’stheauthor’sattitudetowardsproductswithAI?A．Doubtful. B．Supportive. C．Curious. D．Unconcerned.19．What’sthebesttitleforthepassage?A．AIOffersPeopleGoodExperience B．AIHelpsPeopleDoChoresC．AIHasChangedOurLife D．AIIsEnteringOurHouses（2022·全国·高二课时练习）SouthKoreanresearcherssaytheyhavedevelopedaskin-likematerialthatbehavesliketheskinofachameleon(变色龙).Itcanchangecolourstolooklikeitssurroundings.TheteamledbyKoSeung-hwan,amechanicalengineeringprofessoratSeoulNationalUniversitycreatedtheskinwithaspecialliquidthatturnscoloursindifferenttemperatures.Thesechangesarecontrolledbyflexibleheatersmadeofverysmallwires.Ifyouareinadesert,andyouwearforest-colouredclothing,youcaneasilybeseen.Changingcoloursandformsactivelywiththetemperatureiscentraltothetechnology,Kosaid.Thetechnologyusessomethingcalledthermochromicliquidcrystal(水晶)andsilvernanowireheaters.Thermochromicmeansheatcausesthecolourstochange.Nanowiresarejustlikenormalelectricalwires,buttheyareextremelysmall.Koandtheteamdemonstratedthistechnologyusingachameleon-shapedrobotwithcolour-seekingsensors.Theskintriedtocopywhatevercoloursthesensors“saw”aroundit.Inavideo,therobotwalkedonred,blueandgreenfloors.Itimmediatelychangedcolourtolooklikeitssurroundings.Koexplainedwhenthesensorsfindcolourinformation,theymovethatinformationtoaverysmallprocessor.Then,theinformationgoestosilvernanowireheaters.Whentheheatersreachaspecified(规定的)temperature,thethermochromicliquidcrystalchangesitscolour.Thoughtheskinismadeofmanylayers,itstotalthicknessislessthanahundredmicrometers.Inotherwords,itisthinnerthanahumanhair.Byaddingmoresilvernanowirelayersinsimpleshapeslikelinesorsquares,theskincancreatecomplexdesigns.“Theflexibleskincanbedevelopedasawearabledeviceandusedforfashion,”Kosaid.Itcanalsobeusedinmilitary(军事的)clothingandtocreatedesignsontheoutsideofcarsandbuildings.20．Inwhichconditiondoestheskin-likematerialchangeitscolours?A．Inthecoldclimate. B．Inthehotweather.C．Indifferenttemperatures. D．Indifferentsurroundings.21．Whatplaysthekeyroleinthetechnology?A．Achameleon-shapedrobot.B．Asensorfindingcolourinformation.C．Forest-colouredclothesworninthedesert.D．Thermochromicliquidcrystalwithsilvernanowireheaters.22．Whatdoesthefourthparagraphmainlyfocuson?A．HowKodidtheresearch. B．Howthematerialworks.C．Howtherobotchangesitscolour. D．Howtherobot“saw”thenearbycolours.23．Whatcanweinferabouttheskinfromthelastparagraph?A．Itcanbemadeintocars. B．Itcanbeappliedtomanyfields.C．Itisalittlethickerthanahumanhair. D．Itispopularinthefashionworld.（2022·全国·高二课时练习）Themediaprovidesuswiththeobservationsandexperiencefromwhichwebuildupourpersonalunderstandingoftheworldandhowitworks.Muchofourviewofrealityisbasedonmediamessages.Themedia,toagreatextent,givesusoursenseofreality.Freedomofthemediacarrieswithitcertainresponsibilitiesofhonesty,fairness,accuracyandaccountability.Thepowerofthemediatocreateanddestroyhumanvaluescomeswithgreatresponsibility.Themediaispowerfulinthepoliticalsystem,havingagreatinfluenceonpoliticsandonformingsocialchange.Thepoweristodecidewhowillcommunicatewhattowhom.Televisioncangreatlyinfluencetheelectionofanationalleaderonthebasisofhisorherimage.Professionaljournalistsdohaveacodeofethics(道德标准).Journalistsmakeajudgementaboutwhat’ssafeandappropriatetoreport,whichofteninvolvesdifficultchoices.GermansociologistMaxWeberdistinguishesbetween“ethicsofconviction”and“ethicsofresponsibility”.Accordingtothelatter(ethicsofresponsibility),journalistsmusttakeintoaccounttheforeseeableconsequencesoftheirreporting,andtheimpactitwillhaveonsociety.Theformer,ontheotherhand,asksjournaliststotellthetruth,regardlessoftheconsequences.AccordingtoWeber,bothideasofethicsshouldbeconsidered.Withoutdoubt,informationispower,andthebigownersofthemassmediaareverypowerfulpeople.Televisionandradiostations,newspapers,magazines,andwebsitesare,largely,ownedandcontrolledbyprofit-makingbusinesses.Itisnotstrangethattheirideaswillgetpromotedattimes.Itismyviewthatsuchpowerandresponsibilityshouldneverbeleftinthehandsofafew.Ibelieveitisourresponsibilityasconcernedcitizenstomakesurewearenotmerelypassiveviewers,readersorlisteners.Togetherwecanhaveahugeinfluenceonthemediabymakingourviewsknown.24．What’sthefirstparagraphmainlyabout?A．Responsibilitiesofthemedia. B．Influenceofthemedia.C．Historyofthemedia. D．Problemsofthemedia.25．Wecanlearnfromthethirdparagraphthat__________.A．themediaismoreinterestedinpoliticsthanotherfieldsB．formingsocialchangeisthemaindutyofthemediaC．thegreatpowerofthemediaiscontrolledbypoliticalfiguresD．themediacanaffectpoliticsbyformingpoliticalfigures’images26．Inthewriter’sopinion,citizensshould_________.A．trustthemassmedia B．becomeaninfluenceonthemediaC．knowhowthemediaworks D．trytoreportnewsthemselves（2022·辽宁·辽师大附中高二开学考试）Havingamicrochipimplantedinaman’sbrainmaybecommoninsci-fimovieplots,butitmaysoonbecomeanactualpossibility.Elonmusk,founderofSpaceXandco-founderofelectriccarmakerTesla—hasbeenworkingonthistechnology.OnAug28,Muskgavedisplayofthechip,whichwasimplantedintotheheadofapignamedGertrude.Thechip,developedbyMusk’scompany,isthesizeofacoin.Butdon’tletitssizefoolyou.Thetinychiphasover3,000electrodesattachedtoflexiblethreads,whichcanmonitorabout1,000neurons(神经元).Itcollectsneuralsignalsfromanareaofthebrain,andthentransmitsthosesignalswirelesslytonearbycomputers.Inthedisplay,Gertrudecouldbeseenwalkingaroundherpensniffingthegroundwhileamonitorshowedherbrainactivity.Thoughthetechnologyisstillinitsearlystage,itisencouragingforhumans.Thistechnologywouldsolvealotofbraininjuries,whichwillallowthehumanbraintocombinewithanartificialintelligence.Whenthedevicecanbeappliedtohumans,itsmaingoalwillbetohelpthosewhohavemobilityissues.Muskhopesthistechnologycanalsobeusedtohelpthosewithhearingandeyesightissuesandonedayleadtoacureforepilepsy(癫痫).Althoughsuchadevicecould,inprinciple,repairthoseproblems,puttingitintopracticeisbynomeansapieceofcake.Currently,thedevicecantransmitsignalsfromabout500neuronsinthepig’sbrain.Comparedto80billionneuronsinahumanbrain,thisnumberistiny.Andtocoverthewholehumanbrainalsomeanstheelectrodeshavetobemuchsmaller.Also,implantingthechipintothebrainposesapotentialdanger.Thereisariskoftheimmunesystemattackingthisforeignbody.Rightnow,thehopeofcontrollingthebrainviacontrollingafewneuronsseemsoverlyoptimistic.“TherearemanytechnologicalchallengestoovercomebeforeNeuralinkcanputitsdevicestothepurposes,”YuanLanfeng,anassociateprofessorattheUniversityofScienceandTechnologyofChina,toldChinaDaily.27．WhatdoweknowaboutElonMusk’smicrochipaccordingtothefirstthreeparagraphs?A．Itwasinspiredbysci-fimovieplots B．Itisabletocollectwirelesssignals.C．Itistinyinsizebutpowerfulinfunction. D．Ithasbeenimplantedintoahuman’sbrain.28．Whatdoparagraphs6-7mainlytalkabout?A．Potentialproblemsinapplyingthechiptohuman.B．Keydifferencesbetweenpigs’andhumans’brains.C．Theamountoftimeandmoneyimplantingthechipcouldcost.D．Howtheimmunesystemisthemajorobstacletotheimplant.29．Whatisthemajortargetofthemicrochipinhumanapplication?A．Tomonitoranimals’brainactivity. B．Tohelppeoplewithdifficultyinmovingfreely.C．Todevelopacureforepilepsy. D．TocontributetotheresearchonAltechnologies.30．HowdoesYuanLanfengfeelaboutimplantingthechipintothehumanbrain?A．Worried. B．Excited. C．Optimistic. D．Cautious.参考答案：1．D

2．B

3．C

4．A【导语】这是一篇说明文。文章介绍了SpaceX的第20次任务升空到国际空间站所进行的实验，并对实验的背景和所具有的重大意义进行了介绍。1．细节理解题。根据文章第一段“WhenSpaceX’s20thmissionliftedofftotheInternationalSpaceStation,beatingheartcellswerealongfortheride.After22days,theheartcellswerereturnedtoEarth-andtheywerestillbeating.ThisexperimentmarksasignificantsteptowardhelpingheartpatientsonEarthinthefuture.(当SpaceX的第20次任务升空到国际空间站时，跳动的心脏细胞随之而来。22天后，心脏细胞被送回地球，它们仍然在跳动。这项实验标志着在未来帮助地球上的心脏病患者迈出了重要的一步)”可知这个实验标志着在未来帮助地球上的心脏病患者迈出了重要的一步，即对地球上的心脏病患者意义重大；故选D项。2．细节理解题。根据文章第三段“Whenherexperimentusingsimulatedzero-gravityonEarthshowedpromisingstepstowardquicklyandsafelyproducingcardiomyocytes,Xusawspaceastheprovingground.Her experimentwaschosentoflyonthespacestationinordertodeterminehowtheabsenceofgravityimpactsstemcellsthatareessentiallyturnedintoheartcells.(当她在地球上使用模拟零重力进行的实验显示出快速安全地生产心肌细胞的有希望的步骤时，Xu将太空视为试验场。她的实验被选中在空间站上飞行，以确定没有重力如何影响干细胞，这些干细胞基本上变成了心脏细胞)”可知Xu把她的实验送上太空的原因是为了测试在无重力的情况如何影响干细胞使其加速变成心脏细胞，即测试一种加速干细胞生长的方法；故选B项。3．细节理解题。根据文章最后一段“WhentheselivecellsreturnedtoEarth,Xuandhercolleaguesdiscoveredthatthestemcellsgrowfasterinzerogravity.(当这些活细胞返回地球时，Xu和她的同事发现干细胞在失重状态下生长得更快)”可知在失重状态下，干细胞生长的更快，即失重状态对干细胞的生长是理想的；故选C项。4．细节理解题。根据文章最后一段“Thisrapidabilitytogrowcardiomyocytescouldgeneratealargenumberofhealthyheartcellsforchildrenandadultswithvariousheartdiseases.Withthesenewfindings,theresearchcouldleadamoreefficientandcost-effectivewaytodeveloptheheartcellsonEarthforpatientsinneed.Thecellshavegreatpotentialtotreatchildrenandadults.(这种快速生长心肌细胞的能力可以为患有各种心脏病的儿童和成人产生大量健康的心脏细胞。有了这些新发现，这项研究可以引导一种更有效和更具成本效益的方式来为有需要的患者产生地球上的心脏细胞。这些细胞具有治疗儿童和成人的巨大潜力)”可知这个实验发现的这种快速生长心肌细胞可以为各种心脏病儿童和成人产生健康心细胞，这项研究可以引导一种更有效和更具成本效益的方式来产生需要的心脏细胞，所谓更有效和更具成本效益的方式即一种新的治疗方法。故这个实验的贡献就是为这些心脏病患者测试出了心的治疗方法；故选A项。5．C

6．B

7．C【导语】本文是一篇应用文，主要讲述了四种读书软件的用途和好处。5．推理判断题。根据文章FReader部分的“Apartfrombeingareadingapp,FReaderhasanintegratedtranslatorforfivelanguages(English,Russian,German,French,andUkrainian),makingtheappattractivetopeopleacrosstheworld.(FReader除了是一款阅读应用外，还集成了五种语言（英语、俄语、德语、法语和乌克兰语）的翻译器，使该应用程序对世界各地的人们都具有吸引力。)可知FReader对国际读者很有吸引力，因为它有一个强大的集成翻译器。故选C。6．推理判断题。根据文章AIReader部分的“Thisapphasenhancedgraphical(图解的)featuresandawiderangeofcustomizationoptionsthatfocusonprovidingthebestqualityforfictionalbookreading.(此应用程序具有增强的图形功能和广泛的自定义选项，专注于为虚构书籍阅读提供最佳质量。)”可推知使用AIReader，我们可以欣赏出色的图形。故选B。7．细节理解题。根据文章Nook部分的“Businessmodel:Freeapp.WiththepartnershipwithBanes&Noble,youcanfindoveramillionfreebooksontheirwebsiteorpurchasenewtitlesforthepriceofaslowass0.99.(商业模式：免费应用程序。通过与Barnes&Noble的合作，您可以在他们的网站上找到超过一百万本免费书籍或以低至0.99美元的价格购买新书。)”可知您可以在Nook上免费阅读Barnes&Noble的书籍。故选C。8．C

9．D

10．A

11．C【导语】本文是一篇说明文。主要介绍了麻省理工学院(MassachusettsInstituteofTechnology)最新公布的数字建设平台(DCP)将如何解决在火星上建房子的问题的。8．推理判断题。第一段的“Whilethebestsolutionwouldbetohavethestructuresreadybeforetheygetthere,ithassofarbeenachallengegiventhatmostconstructionrobotshavenevermadeitoutofthelaboratory.(虽然最好的解决方案是在结构物到达之前做好准备，但鉴于大多数建筑机器人从未走出实验室，这一直是一个挑战)”推知，在火星上建造建筑物正处于测试阶段。故选C项。9．细节理解题。根据第二段的“...unlikeother3—Dprintersthatarelimitedtobuildingobjectsthatfitwithintheiroverallenclosure,DCP’sfreemovingsystemcanbeusedtoconstructstructuresofanysize.(……与其他仅限于构建适合其整体外壳的物体的3D打印机不同，DCP的自由移动系统可用于构建任何尺寸的结构)”可知，与其他3D打印不同，它可以建造更多样化的房屋。故选D项。10．主旨大意题。根据第三段的“TheteamrecentlydemonstratedtheDCP’sbuildingskillsonanemptyfieldinMountainView,CA.(该团队最近在加利福尼亚州山景城的一块空地上展示了DCP的建筑技能)”可知，本段主要介绍了DCP的成功案例。故选A项。11．细节理解题。根据最后一段的“mostimportantly,capableofsourcingconstructioncomponentsfromitssurroundings.Thismeanstherobotcanbesenttoremote,disaster-strickenareas,andperhapseventoMars,tobuildsheltersusingwhatevermaterialisavailable.(最重要的是，能够从周边采购建筑构件。这意味着机器人可以被送到偏远的灾区，甚至火星，用任何可用的材料建造居所)”可知，未来DCP的最大亮点是可以现场收集建筑材料。故选C项。12．D

13．D

14．A

15．A【导语】本文是一篇说明文。现如今，很多人都离不开手机。我们应该担心手机辐射吗?12．词义猜测题。根据第一段最后一句“IonizingradiationincludesX-rays,whichhavebeenproventobeharmful,buttheevidenceisstilliffyaboutnon-ionizingrays.（电离辐射包括X射线，这些射线已被证明是有害的，但关于非电离射线的证据仍然很薄弱。）”可知，画线词前后进行对比，非离子化辐射是否有害的证据还不明确，故画线词的意思是“不确定的”。故选D项。13．细节理解题。根据第二段最后一句“Intheshortterm,theyarelikelyharmless.Butinthelongterm,itcouldbeadifferentstory.Anyway,wholikestheideaofamicrowave,evenalow-poweredone,nexttotheirheadallday?（在短期内，它们可能是无害的。但从长远来看，这可能是一个不同的故事。不管怎么说，谁会喜欢整天挨着脑袋的微波炉，哪怕是低功率的微波炉呢？）”可知，DrSanjayGupta认为持续地接触辐射是有害的。故选D项。14．推理判断题。根据第四段的第一二句“ItshouldbenotedthatthelevelsofradiationthattheratswereexposedtoweremuchhigherthanthelimitssetbytheFederalCommunicationsCommission(FCC).“Thelevelsandtimeofexposuretoradiofrequencyradiationweremuchgreaterthanwhatpeopleexperiencewitheventhehighestlevelofcellphoneuse,”theNTPsaid.（应该指出的是，老鼠暴露的辐射水平远高于联邦通信委员会设定的限制。“暴露于射频辐射的水平和时间远远大于人们在最高水平的手机使用中所经历的，”NTP说。）”可知，研究中，老鼠受到的辐射强度要远远高于手机所带来的辐射，所以研究得出的结论可能不适用于人类。故选A项。15．主旨大意题。根据第五段的一二句“ResearchersatDrexelUniversitymaybeontosomething.TheteamhascreatedananomaterialmadeoutofathinlayerofMXenes,whichwillprotectadevicefromelectromagneticpollution.（德雷塞尔大学的研究人员可能会做一些事情。该团队创造了一种由MXenes薄层制成的纳米材料，可以保护设备免