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題源:VOA慢速英語(yǔ)學(xué)段:高中題型:七選五每日一練話題:一顆小行星正在遠(yuǎn)離地球Passage1AnasteroidthatmovedclosertoEarth'sorbitinrecentmonthsisnowmovingawayfromourplanetasgravitypullsitbacktowardthesun.Thissmallasteroid,about10meterslong,wasnamed2024PT5.1.____ItwasrecentlypulledclosertoourplanetbyEarth'sgravitationalforces,whichledtosomeinterestingobservations.Scientistssometimescallsuchobjects"mini-moons"duetotheirbehaviorwhencapturedbygravity.2.____TheAmericanspaceagencyNASAhasitsownviewonthisasteroid.Itdoesn'tconsider2024PT5amini-moonasitwasneverfullycapturedbyEarth'sgravity.However,NASAdoesthinkit'saninterestingobjectworthyofstudy.
3.____Identifyingandtrackingsuchasteroidsisanimportanttaskforscientists.TheasteroidwasfirstobservedonAugust7bytwoastronomerbrothersfromSpain'sComplutenseUniversityofMadrid.TheyusedatelescopeinSouthAfricafortheidentification.4.____Thepathof2024PT5isquiteunique.ItbeganmovingtowardEarthinlateSeptember,withapathsimilartoahorseshoe.ByJanuary,whenitreturns,itwillbemovingatmorethandoublethespeedfromSeptember.5.____NASAanditsinternationalpartnersareconstantlyonthelookoutfornear-Earthobjects.Thisincludesasteroidsandcometswithin50millionkilometersofEarth'sorbit.ThesearchsystemATLAS,withfourtelescopesindifferentlocations,isdesignedtosearchthewholeskyseveraltimeseachnight.A.Butit'snotalwayseasytospotthesesmallanddimobjects.
B.Theobject'smovementhasbeencloselymonitoredbyscientists.
C.ItsmovementwasfirstdetectedbySpanishastronomers.
D.Suchasteroidsareconsiderednear-Earthobjects.
E.Itwasanobjectthatcameunderthespotlightofthescientificcommunity.
F.Theagencyhasitsownreasonsforclassifyingitinacertainway.
G.Thesearchfornear-Earthobjectsisacrucialpartofspaceresearch.答案EFCBGPassage2Anasteroid,2024PT5,hasbeenmakingitswayaroundoursolarsysteminaninterestingmanner.1.____Thissmallasteroid,measuringabout10meterslong,hasastoryworthexploring.ItwaspulledclosertoEarthbyourplanet'sgravitationalforcesrecently,sparkingscientificinterest.
2.____Theconceptof"mini-moons"isrelevanthere.Scientistssometimeslabelsuchobjectsas"mini-moons"becauseoftheirbehaviorwheninfluencedbyEarth'sgravity.However,NASAhasadifferenttakeon2024PT5.3.____NASA'sstanceon2024PT5isquitedistinct.Itdoesn'tconsiderthisasteroidatrue"mini-moon"asitwasn'tfullycapturedbyEarth'sgravity.Nevertheless,theyrecognizeitsvalueforstudy.4.____Thediscoveryof2024PT5isaninterestingtale.TwoastronomerbrothersfromSpain'sComplutenseUniversityofMadridfirstobserveditonAugust7,usingatelescopeinSouthAfrica.5.____Thefuturepathof2024PT5isalsobeingcloselywatched.It'sexpectedtoreturntoEarth'svicinityinJanuary,movingatamuchhigherspeedthanbefore.AndscientistspredictitsnextcloseapproachtoEarthwillbein2055.A.Thepathoftheasteroidisakeyaspectofitsstudy.
B.Thesmallsizeoftheasteroiddoesn'tmakeitanylessimportant.
C.TheseobjectsactlikeatemporarymoonwhenunderEarth'sinfluence.
D.Theirobservationsledtotheidentificationofthisuniqueasteroid.
E.Theagencyhasitsowncriteriaforclassifyingspaceobjects.
F.It'snormalforasteroidstobeaffectedbygravitationalforces.
G.Thisasteroid'smovementpatternisattractingscientificattention.答案BCEDAPassage3Theasteroid2024PT5hasbeenanobjectofgreatinterestinthescientificworld.1.____Firstly,itssizeandinitialapproachtoEarthareremarkable.Measuringabout10meterslong,itwasdrawnclosertoourplanetbyEarth'sgravitationalpullinrecentmonths.2.____Theterm"mini-moon"comesintoplaywhendiscussing2024PT5.Scientistsoftenusethistermforsuchobjectsduetotheirmoon-likebehaviorwhenunderEarth'sgravity.ButNASAhasadifferentperspective.3.____NASA'sviewon2024PT5isbasedonspecificcriteria.Itdoesn'tclassify2024PT5asamini-moonasitwasn'tfullycapturedbyEarth'sgravity.Instead,theyseeitasaninterestingobjectforresearch.4.____Thediscoveryprocessof2024PT5isalsofascinating.TwoastronomerbrothersfromSpain'sComplutenseUniversityofMadridfirstspotteditonAugust7,usingatelescopeinSouthAfrica.
5.____Lookingahead,thefuturemovementof2024PT5isbeingcloselymonitored.ItwillreturntoEarth'svicinityinJanuary,andthenmovefurtherintothesolarsystemwhileorbitingthesun.Scientistsarealsopredictingitsnextcloseapproachin2055.A.Theirdiscoverywasthestartingpointofin-depthresearchonthisasteroid.
B.Thisbehaviormakesthemsimilartothemooninsomeaspects.
C.Thesizeoftheasteroidmightbesmall,butitssignificanceislarge.
D.The
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