Unit4Astronomy新人教版必修3

1新课标人教版Unit4Astronomy：thescienceofthestars——天文学：恒星科学核心词汇1．Doyouthinkoureducation____________(制度)needsimproving?2．The____________(气候)ofsouthernFloridaattractsthousandsoftouristseachwinter.3．Withoutpracticetherewouldbeno____________(理论)．4．Thehenwasoldanditstopped____________(下蛋)eggs.5.Theidea____________(存在)onlyinthemindsofusyoungpeople.6．ProfessorLihassolvedthe____________(难题)andeveryoneischeering.7．Mars’__________(万有引力)isonlyabout38%ofEarth’s.8．Raisingyourchildtotellthedifferencebetweenrightandwrongisoneofthef____________tasksofparenthood.9．用harm的适当形式填空(1)Airpollutionwillgetworseandthiswillbe____topeople，forexample，itcancausecancer.(2)Rubbishcanbechangedinto____________things.(3)Don’t____________youreyesbyreadinginthedimlight.10．Lastnightwehadadiscussion，whichbecamemoreandmore____________.Finallywereachedanagreementthatwewillneveruse____________whateverhappens.(violent)1.system2.climate3.theory4.laying5.exists6.puzzle7.gravity8.fundamental9.(1)harmful,(2)harmless(3)harm10.violent；violence高频短语1．________________及时，终于2．________________下蛋3．________________产生；分娩4．________________轮到某人；接着5．________________阻止；制止6．________________挡住(光线)7．________________感到高兴；感到振奋8．________________既然9．________________突发；爆发10．________________密切注视；当心；提防1.intime2.layeggs3.givebirthto4.inone’sturn5.prevent...from6.blockout7.cheerup8.nowthat,9.breakout10.watchout重点句式1．________________wasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.随后它会变成什么没有人知道，直到38～45亿年前，这团尘埃才慢慢地形成一个固体的球状物。2．Theearthbecame____________itwasnotclearwhethertheshapewouldlastor2not.地球变得如此猛烈，以至于它的形状能否持久还不清楚。3．Thisproducedachainreaction，which__________________.这就产生了一系列的反应，使得生命有可能发展了。4．Wewatched，________________ontheoutsideofthespaceshipastheearth’sgravityincreased.我们惊奇地看着，随着地球引力的增加，宇宙飞船的外层燃烧起火。5．ButwhenItriedtostepforward，IfoundIwascarried_________ontheearthandfellover.而当我试着向前迈步时，我发觉我被送出很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。6．“...walkingdoesneedabitofpractice________________gravityhaschanged.”“……既然重力改变了，走路也确实需要练一练了。”1.Whatitwastobecome2.soviolentthat3.madeitpossibleforlifetodevelop4.amazedasfirebrokeout,5.twiceasfaras6.nowthat知识详解1.existvi.存在，生存(回归课本P26)Theylaideggstooandexistedontheearthformorethan140millionyears.它们也生蛋，在地球上生存了一亿四千多万年。[归纳拓展]①(牛津P697)Theycan’texistonthemoneyhe’searning.他们靠他挣的那点钱无法维持生活。②Thereexistsagoodwaytosolvetheexistingproblemingeography.有一个解决现存地理问题的好办法。③Nooneknowshowthisworldcameintoexistence.没有人知道这个世界是怎样形成的。[例句探源][即境活用]1．完成句子(1)巴基斯坦在战后就以一个独立的国家存在了。Pakistan________________________________________________countryafterthewar.答案：cameintoexistenceasanindependent(2)就我所知，他们收入微薄，几乎无法维持生活。AsfarasIknow，theyarepaidhardlyenough________________________.答案：toexiston2.puzzlen．谜；难题vt.&vi.(使)迷惑；(使)为难(回归课本P27)Howlifebeganonearthisoneofthebiggestpuzzlesthatscientistsfoundhardtosolve.地球生命如何起源是科学家们觉得很难解决的最大的难题之一。[归纳拓展]①(牛津P1616)Whatpuzzlesmeiswhyheleftthecountrywithouttellinganyone.令我不解的是，他为什么悄悄地离开了这个国家。②Thepolicearestillpuzzlingabout/overhowtheaccidentcouldhavehappened.3警察仍然正在苦思这起事故是怎么发生的。[例句探源]③Scientistshavebeentryingtosolvethispuzzleforyears.多年来科学家们一直试图解开这一谜团。④(牛津P1616)HelookedpuzzledsoIrepeatedthequestion.他好像没听懂，于是我又把问题重复了一遍。2．Shelostheartsinceshefailedintheexam.Shefelt________aboutherfuture.A．puzzleB．puzzlingC．puzzledD．puzzles解析：选C。后句句意：她对她的将来感到迷惑。puzzledadj.(人)迷惑的，迷惘的；puzzlingadj.(物)令人迷惑的。[即境活用]3.pulln.&vt.拉(力)；拖；牵引力(回归课本P30)Astherocketroseintotheair，wewerepushedbackintoourseatsbecauseweweretryingtoescapethepulloftheearth’sgravity.随着火箭的升空，由于我们在努力挣脱地球的引力，我们被向后推在座位上。[归纳拓展]①Hepulledthedooropenandrushedout.他拉开门，冲了出去。②(牛津P1604)Thepolicecarsignalledtoustopullin.警车发出信号，要我们驶向路边停靠。③Wewavedasthetrainpulledoutofthestation.火车驶出车站时我们挥手告别。④ThedoctortoldmethatIwouldpullthrough.医生告诉我，我会康复的。[例句探源]【高效记忆】3．用pulldown；pullin；pullout；pullthrough填空：(1)Houseswere________tomakewayforanewhighway.答案：pulleddown(2)Cheerup！Takemoreexerciseeverydayandyouwill________.答案：pullthrough[即境活用](3)John________behindmeandparked.答案：pulledin(4)Becarefulwhenyou________ofthedriveway.答案：pullout4.intime及时；终于，总有一天(回归课本P25)Theywereintimetoproducecarbon，nitrogen，watervapourandothergases，whichweretomaketheearth’satmosphere.最终产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。[归纳拓展]①Thekidswillbeleavinghomeinnotime.孩子们很快就要离开家了。4②(朗文P2162)Willyoubebackintimefordinner?你会及时赶回来吃晚饭吗？③(朗文P2162)Ishouldbebackintimetowatchtheshow.我应该及时赶回来看那场演出。④Thecompanyfiredhimfornotcomingtoworkontime.那家公司因他不按时上班而解雇了他。[例句探源]4．Willyoubehome________toseethechildrenbeforetheygotobed?A．ontimeB．intimeC．atatimeD．atonetime解析：选B。句意：你会在孩子们上床睡觉之前回来看他们吗？intime意为“及时”，符合题意。ontime按时；atatime每次；atonetime曾经。[即境活用]5．________，IlostheartinEnglishlearning，butmyteacheroftensaidtome，“Keeponstudyinghard，andyou’llsucceed________.”A．Atatime；intimeB．Atatime；ontimeC．Atonetime；intimeD．Atonetime；ontime解析：选C。考查由time构成的固定搭配的用法。句意：曾经，我对英语学习失去信心，但老师常对我说：“坚持不懈的努力，最终会铸就你的成功。”atatime“每次”；atonetime“曾经，一度”相当于once；intime“及时，迟早”，当“迟早”讲时相当于soonerorlater；ontime“按时，准时”。由句意知应选C。6．(2010年江西景德镇模拟)—Doesheoftenaskyouforhelp?—Oh，no，only________.A．allthetimeB．atonetimeC．atatimeD．attimes解析：选D。allt