2020年高考选择题专项集训 英语(十六)
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一、阅读理解
A
China’sFive-hundred-meterApertureSphericalRadioTelescope(500米口径球面射电望远镜)(FAST)hasdetectedarepeatingfastradioburst(FRB)—mysteriousradiosignalsfromouterspace—forthefirsttime,ScienceandTechnologyDailyreported.
ScientistsontheFASTprojectwiththeNationalAstronomicalObservatoriesofChina(NAOC)revea ledthenewslastWednesday.TheFRBoriginatedsomethreebillionlightyearsawayfromEarth.Otherfact orsincludingaircraftandsatelliteshavebeendismissedandcrossexaminationisbeingcarriedout,thescien tistssaid.
FRBhassincebecomeoneofthehottesttopicsinastronomy.Itwasnotuntil2007whenthefirstFRBwa sdiscoveredbyhumans.Fewerthan100FRBshavebeendetectedinternationally.Thereisstillnoreasonabl eexplanationfortheoriginofFRBintheinternationalscientificcommunityatpresent.FRBsmostlyonlyap pearonce,whichmakesthemveryhardtotrack.
TheFRBdetectedbyFAST’sreal-timedetectionterminal(终端),however,isonethathasbeenobservedbefore,saidZhangXinxin,anassistantengineerwiththeNAOC. KnownasFRB121102,itwasfirstdiscoveredin2012andfoundtorepeatin2015.Analysisofdatalaterlocat edthesourceofthesignalcomingfromadwarfgalaxy(矮星系)threebillionlightyearsaway.ThefirstpulsefromFRB121102wasspottedbyFASTonAug30,2019.Af terthis,thetelescoperecordeddozensofpulsesfromtheFRBoverthecourseofdays.OnSept3,2019alone, morethan20pulsesweredetected.
Thenumberofmysteriousburstsdetectedsofaristoosmalltodrawanyconclusions,Zhangsaid.FAS T,theworld’slargestsingle-
dishradiotelescope,hasacertainedgeindetectingrepeatedFRBs.Thisisbecausethe19-beamreceiverinstalledonFAST,coveringfrequencyrangesof1.05-
1.45GHz,isverysensitivetoradiosignals,Zhangsaid.
1.Thewholetextmainlygivesusanintroductionto________.
A.abriefintroductionofFAST.
B.adiscoveryofFAST
C.thevalidationofFAST
D.theusageofFAST
2.WhichofthefollowingstatementsisTRUE?
A.FRB121102isthefirstfastradioburstthatwasdiscoveredbyhumans.
B.TheFRBdetectedbyChina’sFASTthistimehasnotbeenobservedbefore.
C.FRBsmostlyonlyappearonce,whichmakesthemveryhardtotrack.
D.Wecaninferthatbillion-lightyearisatermoftimeinastronomy.
3.ApertureSphericalRadioTelescope(FAST)_______.
A.istheworld’slargestradiotelescope
B.hasdetectedmorethan100FRBs
C.foundreasonableexplanationfortheoriginofFRB
D.hasbeeninstalledwiththe19-beamreceiver
B
Surprise!HighSchoolStudentDiscoversNewPlanetThreeDaysIntoNASA.
When17-year-oldWolfCukieracceptedaninternship(实习)atNASA,heexpectedtobechallengedandgaininsightsintopursuingacareerinastrophysics(天体物理学).Instead,heattainedworldwidefameforanachievementfindinganewplanet!
Theteenagercameacrossthedistantworldwhileexaminingimagesofthevariationsinstarbrightness capturedbyNASA’sTransitingExoplanetSurveySatellite(TESS)anduploadedtoPlanetHuntersTESSb yamateurcitizenastronomers.“Iwaslookingthroughthedataforeverythingthevolunteershadmarked,”C ukiersaid.“Aboutthreedaysintomyinternship,IsawasignalfromasystemcalledTOI1338.Atfirst,Ithoug htitwasastellareclipse(日食)butthetimingwaswrong.Itturnedouttobeaplanet.”FurtherresearchrevealedthatTOI1338b,asitisno wcalled,isararecircumbinaryplanet(环双星行星)—aworldorbitingtwostars.Evenmoreexciting,TOI1338bisthefirstcircumbinaryworlddiscoveredbythe TESSmission.
TheresearchersbelievethatTOI1338bisabout6.9timeslargerthanEarth.TheexpertsclaimthatTOI 1338b’stwostarsvaryinsize.ItisalsotheonlyplanetintheTOI1338system,whichlies1,300light-yearsawayfromEarth.
Notsurprisingly,theHighSchoolseniorislookingtopursueacareerinphysicsandastrophysics.Whe naskedofhisplanstoseekoutajobatNASA,theyoungstersaid,“I’venoideaaboutNASA’shiringpractices butitcan’thurt!”Headded,“Acareerinspaceresearchisappealing.”