2020版高考英语一轮复习Unit4Astronomy：thescienceofthestars课时作业（含解析）新人教版

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1、Unit4Astronomy：thescienceofthestars课时作业Ⅰ.阅读理解Washington：NASAhasannouncedevidencethatJupiter'slargestmoon，Ganymede，hasasaltwateroceanunderitsicysurface.TheoceanseemstohavemorewaterthanallthewateronEarth'ssurface，accordingtonewHubbleobservation.NewHubbleobservationsof

2、Ganymede'smagneticfieldstronglysuggestthatthemoon，whichisthelargestinourwholesolarsystem，ishometoasubsurfaceocean.Scientistsestimatetheoceanis95kilometresthick，whichisabout10timesdeeperthanEarth'soceans.Butunlikeoursaltywaters，Ganymede'soceanisburiedunder150kilometr

3、esofice.Whilescientistshavespeculated(推测)since1970saboutthepresenceofanoceanonGanymede－thelargestmooninoursolarsystem－untilnowtheonlyobservationalevidencecamefromabriefflybybytheGalileospacecraft，whichdidn'tobservethemoonlongenoughtoconfirmaliquidocean.Thisdiscovery

4、marksanimportantmilestone，highlightingwhatonlyHubblecanaccomplish.Inits25yearsinorbit，Hubblehasmademanyscientificdiscoveriesinourownsolarsystem.AdeepoceanundertheicysurfaceofGanymedeopensupfurtherexcitingpossibliitiesforlifebeyondEarth.Scientists_have_already_confir

5、med_the_existence_of_an_ocean_on_Europe，anothermoonorbitingJupiter，andNASAhasannouncedplanstosendanunmannedmissiontheresearchingforthelifethatmightcomewithliquidwater.HubbleisatelescopethatorbitsEarth，butbecauseofitsimpressivegravitationalanalysesitcanbeusedtostudyt

6、heinsideoffardistantplanets.Usingthesesameprinciples，scientistscouldtheoreticallydetectoceansondistantplanetsaswell.【语篇解读】　这是一篇关于天文知识的新闻报道。科学家们通过Hubble望远镜判断在木星上发现海洋的存在，人们期待更多的地球以外的生命存在。1．WhatcanwelearnabouttheGanymedefromthepassage?A．Itisaplanetwiththelargestmoonino

7、urwholesolarsystem.B．Itsoceanaddstopeople'sexcitementaboutlifebeyondEarth.C．ItwillbeusedbyNASAasabasefortheHubbletelescope.D．ItsliquidoceanwasfirstprovedbytheGalileospacecraft.【答案】　B　细节理解题。根据通过第五段中“AdeepoceanundertheicysurfaceofGanymedeopensupfurtherexcitingpossibil

8、itiesforlifebeyondEarth.”可知海洋增加了人们关于地球以外的生命的兴奋。故选B。2．Whichofthefollowingbestdescribesthewriter'sattitudetowardsHubble?A．Cautious.　　　　　B．Do