Unit4Astronomy:thescienceofthestars重要词汇相关提示systemn.系统;体系;制度牢记该词的基本用法,比如作“系统;体系;制度”讲时是可数名词theoryn.学说;理论掌握该词的用法,比如intheory的含义是“理论上”violentadj.猛烈的;激烈的;强暴的注意该词的基本词义及其副词、名词形式intime及时;终于掌握intime的两个含义以及含time的常用短语unlikeprep.不同;不像注意unlike的反义词是likeharmfuladj.有害的牢记harm以及harmful的短语layeggs下蛋掌握layeggs中lay的用法existvi.存在;生存注意该词的用法及其派生词existence重要词汇相关提示givebirthto产生;分娩牢记该短语的用法以及含birth的相关短语,并注意givebirthto与beborn的不同用法inone’sturn轮到某人;接着注意含名词turn的相关短语prevent...from阻止;制止掌握该短语的用法及其同义词组stop...from和keep...frompuzzlen.谜;难题vi.&vt.(使)迷惑;(使)为难牢记puzzle作为名词和动词的用法pulln.&vt.拉(力);拖;牵引力注意pull的用法及其反义词pushcheerup感到高兴;感到振奋掌握cheerup既可以作及物动词短语又可以作不及物动词短语的用法nowthat既然记住nowthat作连词,其同义词是since,seeingthat重要词汇相关提示breakout爆发;突发注意breakout不用于被动语态,并记住break的相关短语watchoutfor密切注视;当心;提防牢记watchout的用法以及含watch的常用短语1.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.(what引导主语从句,when引导定语从句)2.Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.(so...that...如此……以至于……)3.Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.(what引导主语从句,that引导表语从句)4.Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.(whether引导主语从句)5.Icheeredupimmediatelyandfloatedweightlesslyaroundinourspaceshipcabinwatchingtheearthbecomesmallerandthemoonlarger.(现在分词短语watching...作伴随状语)学习主语从句的用法。通过对本单元的学习,能够运用本单元的知识去解决一些科学问题,并能在此基础上提出自己的见解。SectionⅠ—WarmingUp,Pre-reading,Reading&Comprehending一、将单词或短语与相对应的释义搭配起来AB1.theorya.differentfrom;notsimilarto2.unlikeb.tobepresentorhappen3.prevent...fromc.anideaoropinion4.existd.causingharm5.harmfule.tostop/keep...from答案:1.c2.a3.e4.b5.d二、短语互译A.温故:从文中找出下列短语并写出它们的汉语意思。1.accordingto2.cooldown3.bedifferentfrom4.dependonB.知新:从文中找出与下列释义对应的英文。1.及时;终于2.阻止;制止3.下蛋4.产生;分娩5.轮到某人;接着答案:A.1.根据;按照2.变凉3.与……不同4.依赖;取决于B.1.intime2.prevent...from3.layeggs4.givebirthto5.inone’sturn三、阅读课文HOWLIFEBEGANONTHEEARTH,按照地球的形成与发展,给下面的句子排序()AInsectsandamphibiansappeared.()BTheearthwasasolidglobe.()CReptilesappeared.()DTheearthwasjustacloudofdust.()EShellfishandotherfishappeared.()FDinosaursappeared.()GSmallplantsbegantogrowonthesurfaceofwater.()HPlantsbegantogrowondryland.()IWaterbegantoappearontheearth.()JMammals(includinghumans)appeared.答案:A—7B—2C—8D—1E—5F—9G—4H—6I—3J—10四、阅读HOWLIFEBEGANONTHEEARTH,回答下列问题1.Howwerestarsandotherbodiescreated?A.Atomscombinedtocreatethem.B.Cloudsofdustcombinedtocreatethem.C.Watercombinedtocreatethem.D.Gasescombinedtocreatethem.2.Whichisthemostimportantforlifeappearingontheearth?A.Fire.B.Rock.C.Water.D.Clouds.3.Itcanbeknownfromthepassagethat.A.plantsandanimalsappearedontheearthatthesametimeB.plantsappearedlaterontheearththananimalsC.earlyshellfisha...
