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1、Unit4 Astronomy:thescienceofthestars(时间：90分钟 满分：110分)第一部分 阅读理解(共两节；满分30分)第一节 (共10小题；每小题2分，满分20分)阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。AWhatsciencefiction(story)oncetoldaboutotherworldsfarawayisnowafact.Astronomers(expertsatthescienceoftheuniverse)proveanothersolar(ofthesun)systemlikeourswithsomepla
2、netsintheconstellationAndromeda(仙女座)．GeoffreyMarcyisaprofessorofastronomyandphysicsatSanFranciscoStateUniversityandsays,“Whatwehavefoundnow，forthefirsttimeever,isindeedafully－grownsystem－ofplanetsaroundthestarUpsilonAndromeda.Itappearstohavethreeplanets，oneclosein，oneatamiddledistance，andonefart
3、herout.Thestarisslightlylargerthanoursun.Theplanetsarehuge，likeourJupiter(木星)．”Marcy'spartnerinthisresearch，DebraFischer,describesthesolarsystem，“Herearetheinnerplanetthatgoesaroundevery46days,themiddleplanetthatgoesaroundevery242days,andthentheouterplanetthatgoesaroundeverythreeandahalftofourye
4、ars.”Astronomically,it'snotfaraway,44lightyears.Thesunofthatsolarsystem，UpsilonAndromeda，issonearandbrightthatitcanbeseenbyusingnoequipmentduringsummerandfall.Fortwelveyearsastronomerssearchedtheskiesinthebeliefthatifoursunhasplanetsaroundit,surelyothersdo,too.GeoffreyMarcysays,“Andthenstartingt
5、hreeandahalfyearsago,webeganfindingforthefirsttimeplanetssingly,oneplanetherearoundonestar...”“WhenIlookupatthestarsnowatnight,Icanimagineeasilythateveryoneofthemhasplanetsaroundthem，”saysDebraFischer.Itwasatremble(shaking)inthestarthatledMarcytotheplanets.“Thestarrocksaroundduetothegravityofthe
6、planetasadogownergetspulledaroundbyalittledog.”Cantheysupportlife?Wedon'tknow,becausepresenttechnologyisnotadvancedenoughtodeterminewhattheplanetsaremadeof.That,Marcysays，isastronomy'snextchallenge.1．What'stherelationbetweenAndromeda(A),UpsilonAndromedasystem(U)andthementionedthreeplanets(P)?11A
7、 BC11 D答案与解析：B 推理判断题。通读全文可知Andromeda是一个星座，像太阳系；UpsilonAndromeda是一颗恒星，像太阳；threeplanets是它的三个卫星，因此可推出B项正确。2．AccordingtoDebraFischer，inthenewsolarsystem,________.A．thefartheraplanetisfromthestar,thelongerittakestogoaroundt
