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选择性必修第四册Unit2IconicAttractionsⅠ.阅读理解AIn1969，watchingthelandingofApollo11ontheMoononTVfromhisparents’farminCanada，ChrisHadfieldwasamazedandexcited.Onthatday，atonlynineyearsold，Chrismadethemostimportantdecisionofhislife：Hewasgoingtobeanastronaut.Therewasn’tevenatrainingprograminCanadatobecomeanastronaut；butChriswasdetermined.Hespentagreatdealoftimestudyingandfixingengines.AfterschoolhejoinedtheCanadianarmywherehelearnedtoflymanydifferenttypesofplanes.ChrisdidalotofresearchfortheNationalAeronauticsandSpaceAdministration(NASA)intheUnitedStatesandhadspecialtraining.Finally，in1995，herodehisfirstrocketintospace.ChrisbecamethefirstCanadianastronauttowalkinspace，andwentonanumberofspacemissionsthroughouthiscareer.Themostmemorablewashisfive-monthstayontheInternationalSpaceStation(ISS)ascommander，betweenDecember2012andMay2013.HepostedonsocialmediathousandsofphotosofEarthandvideosofhimselfexplaininghowthingsworkinzerogravity.Hisfollowerscouldwatchhimsleeping，brushinghisteeth，washinghishands，orpreparing“space”snacksinzerogravity，whichturnedhimintoasocialmediaphenomenon.Today，Christravelstheworldgivingtalksabouthiswork.Heoncesaid，“Decideinyourheartofheartswhatreallyexcitesandchallengesyou，andstartmovingyourlifeinthatdirection.Everydecisionyoumake，fromwhatyoueattowhatyoudowithyourtimetonight，turnsyouintowhoyouaretomorrow.Lookatwhoyouwanttobe，andstartsculptingyourselfintothatperson.Youmaynotgetexactlywhereyouthoughtyou’dbe，butyouwillbedoingthingsthatsuityouinaprofessionyoubelievein.Don’tletliferandomlykickyouintotheadultyoudon’twanttobecome.”1．WhatledChristomakeuphismindtobeanastronaut?A．Thelifeonhisparents’farm.B．Hisabilitytoflyvariousplanes.C．Apollo11’slandingontheMoon.D．Hispassionforstudyingengines.2．WhichofthefollowingwasbestworthrememberingaboutChris’career?A．ServingintheCanadianarmy.B．WorkingascommanderontheISS.C．ReceivingalotoftrainingfromtheNASA.D．BeingthefirstCanadianastronauttowalkinspace.3．WhatmadeChrispopularinthemedia?A．Thespacetasksheconductedinhislife.B．Thepicturesandvideoshepostedonline.C．Hisstrongdeterminationtopursuehisdream.D．HisgreatcontributionstoCanada’sspaceindustry.4．WhatcanwelearnfromChris’wordsinthelastparagraph?A．Courageiswhatittakestoovercomedifficulties.B．Opportunitiesgohandinhandwithchallenges.C．Fromsmallbeginningscomegreatendings.D．Thesecretofsuccessliesinthefirmaim.BPlasticssustainabilityhascomealongwayinrecentyearsinlargepartthankstoscientificadvances.Butevenasplasticsbecomemoreandmoreenvironmentallyfriendly，theworldcontinuestobepollutedasmanyindustriesrelyonthemfortheirwidely-usedproducts.ThelatestresearchfromDrJunpengWang，assistantprofessorinUA’sSchoolofPolymerScienceandPolymerEngineering，hasamethodtoreducesuchwasteandclearascientificpathwaytoamoresustainablefuturethatcanappealtotherubber，tyre，automobileandelectronicsindustries.Theproblemathand：Syntheticpolymers，includingrubberandplastics，areusedinnearlyeveryaspectofdailylife.Theadvantageofsyntheticpolymerslieslargelyintheirexcellentstabilityandvariousmechanicalqualities.However，duetotheirhighdurability，wastematerialsmadeofthesepolymershaveaccumulatedinthelandandoceans，causingseriousconcernsfortheecosystem.Apromisingmethodtotacklethechallengesinplasticssustainabilityistoreplacecurrentpolymerswithrecyclableonesinordertoachieveacircularuseofmaterials.Thekeyinthedesignofchemicallyrecyclablepolymersistoidentifytherightmonomer.Throughcarefulcomputationalcalculation，theresearchersidentifiedatargetingmonomer.Theythenpreparedthemonomerandpolymersthroughchemicalsynthesis，usingabundantlyavailablestartingmaterials.Wang’sresearchgroup，includingpolymersciencegraduatestudentsandapostdoctoralscientist，aimstodeveloppolymersthatcanbebrokendownintotheircomponents.Whentheelementforbreakingthemdownisabsentorremoved，thepolymerswillbehighlystableandtheirthermalandmechanicalqualitiescanbetunedtomeettheneedsofvariousapplications.“Thechemicallyrecyclablepolymerswedevelopedshowexcellentthermalstabilityandmechanicalqualitiesandcanbeusedtopreparebothrubberandplastics，”saysWang.“Weexpectthismaterialtobeanattractivecandidatetoreplacecurrentpolymers.”5．WhatdoweknowaboutDrJunpengWang’sresearch?A．Ithelpsimprovethelevelofplasticsstability.B．Itshowsplasticsaremoreenvironmentallyfriendly.C．Itoffersmorewidely-usedproductstomanyindustries.D．Ittriestodevelopawaytorecycleplasticsscientifically.6．What’stheauthor’sattitudetothecurrentsyntheticpolymers?A．Objective.B．Favorable.C．Unconcerned.D．Doubtful.7．Whatdoesthetextmainlyfocuson?A．Astudyconductedtomakeplasticslastalongerperiodoftime.B．Aqualityforplasticstosatisfytheneedsofvariousindustries.C．Anewmethoddevelopedtosolvetheplasticssustainabilityproblem.D．Aresearchgroupdevotedtoplasticssustainabilityfortheecosystem.8.Inwhichsectionofanewspapermaythetextappear?A．Relationship.B．Fashion.C．Culture.D．Science.CIfyouwereasuperhero，whatwouldyoursuperpowerbe？Wouldyouwanttoflyorbeinvisible？Or，perhaps，you’dratherhavethepowertoreadminds？Wouldn’tthatbecool?Readingmindsisnotasfar-fetchedasyoumightthink.Infact，researchersattheMassachusettsInstitute