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1、必修三 Unit 4 Astronomy：the science of the stars 教案话题词汇1universe n宇宙 2space n太空3spaceship/spacecraft n宇宙飞船4astronaut n宇航员5orbit n轨道6star n恒星7have a great effect on对有很大影响8make a great difference起很大作用；产生很大影响9change ones life改变某人的生活10benefit from得益于，从获益话题佳作随着科技的发展，人类对外层空间的探索越来越深入。你们班据此展开了一次讨论，请根据表格中的内容写一篇
2、讨论稿，并谈谈你的观点和想法。支持(多数学生)1.探索太空是中国人一直以来的梦想；2.有助于未来中国参与国际竞争。反对(部分学生)1.探索太空需要大量的金钱，增加国家的负担；2.中国是一个发展中国家，应努力解决其他社会问题。你的观点和感想佳作欣赏A survey about the exploration of outer space is conducted in our class.Different students have different opinions.The majority are in favor of space exploration because the Chi
3、nese people have been dreaming of going into outer space for a long time.It will help China to take part in the international competition in the future.However，some students argue against it.In their opinion，space exploration increases the economic burden.In addition，as a developing country，China sh
4、ould try to solve other social problems.Personally，its necessary to explore space.As a student，I will study hard so that I can make a great contribution to our country.名师点睛本文结构清晰：第一段引出话题；第二段说明不同学生对太空探索两种截然不同的观点；第三段：总结自己的观点。特色如下：巧用被动语态引出话题；运用现在完成进行时表达中国人民一直以来的梦想；运用含有目的状语从句的复合句总结自己的观点。写作过程中使用过渡和衔接词汇，如
5、however，in their opinion，in addition，personally等，确保行文连贯，过渡自然。A写作必记单词1theory n学说；理论in theory在理论上2unlike prep.与不同；不像It is unlike sb.to do sth.做某事不符合某人的特点3harmful adj.有害的(1)harm n& vt.伤害，损害(2)be harmful to对有害do sb.harm (do harm to sb.)伤害某人；对某人有害There is no harm in doing.做没有害处。(3)If we know that gossip
6、can be harmful(harm)，then why do so many of us do it？(2016浙江)4exist vi.生存；存在(1)existence n生存；存在(2)come into existence产生；成立；开始存在 (3)There exists a good way to solve the existing(exist) problem in geography.(4)It can be quite an eye opener to see the range of classical apples still in existence(存在)(5)
7、It exists in(存在于) milk in great amount.5puzzle vt.& vi.(使)迷惑；(使)为难；n.谜；难题(1)His last paintings are perhaps the most puzzling，which even puzzle all the artists.(puzzle)(2)He had a puzzled(puzzle) look on his face.(3)The firemen were in a puzzle about the cause of the fire.(同义句转换)The firemen were puzz
8、led about the cause of the fire.6gentle adj.温和的；文雅的7pull n& vt.拉(力)；拖；牵引力pull up停车；停止pull on穿上pull down推倒；拆掉pull in进站；停靠pull through康复pull over停靠在路边B阅读识记单词8astronomy n天文学9system n系统；体系；制度10religion n宗教；宗教信仰religious adj.宗教的11billion n& pron.& adj.万亿；十亿12globe n球体；地球仪；地球global adj.全球性的，全世界的用法点拨globe作
9、“地球，世界”解时习惯与不定冠词连用。all over the globe全世界13violent adj.猛烈的；激烈的；强暴的violence n暴力14atmosphere n大气层；气氛用法点拨表示“大气”、“大气层”或“空气”时是不可数名词，它习惯与定冠词连用。15fundamental adj.基本的；基础的16chain n链子；连锁；锁链17multiply vi.& vt.乘；增加(1)Five multiplied(multiply) by eight is forty.(2)If you multiply 7 by 15，you will get 105.(填介词)18g
10、ravity n万有引力；重力19satellite n卫星；人造卫星20physicist n物理学家physics n物理学physical adj.身体的；物理的21extinct adj.灭绝的；绝种的extinction n灭绝22climate n气候用法点拨climate与weather，都可指天气，但前者指一个地方长期的较为固定的气候状态，包括阴晴、干湿、风雨等情况在内，可用不定冠词修饰；而后者指某特定日子的天气情况，不可用不定冠词修饰。23crash vi.& vt.碰撞；坠落24float vt.& vi.(使)浮动；(使)漂浮；(n.)漂浮物25exhaust vt.用尽
11、；耗尽；使精疲力尽(1)exhausted adj.感到筋疲力尽的exhausting adj.令人疲劳的(2)We were exhausted after the journey.(同义句转换)We exhausted ourselves after the journey.用法点拨exhaust是及物动词，其意不是“筋疲力尽”而是“使筋疲力尽”，表示某人自己筋疲力尽时，通常要带反身代词作宾语，或用被动形式(实为系表结构)。1in time及时；终于；合拍子on time准时；按时in no time立即，马上at no time决不at a time一次at one time曾经；一度2
12、give birth to产生；分娩Sheila described the adventure of giving birth to Perri in a tiny town in Trinidad where her husband was doing research fieldwork.希拉描述了在特立尼达的一个小镇生育佩里时的冒险经历，当时她的丈夫在该小镇做野外调查。3in ones turn轮到某人in turn依次；反过来；结果by turns轮流take turns to do/(at/in) doing.轮流做4prevent.from阻止；制止The laws protec
13、t everyone here from being attacked (attack)用法点拨(1)同义短语：stop.from，keep.from。(2)在主动语态中，stop.from和prevent.from中的from可省略；但在被动语态中from不可省；keep .from无论是在主动语态还是被动语态中都不能省略from。5block out挡住(光线)In the early 16th century，people thought that dirt on the skin was a means to block out disease.在16世纪的早期，人们认为皮肤上的脏东西
14、是阻挡疾病的一种方式。6cheer up感到高兴；感到振奋(1)In the authors eyes，motorheads are cheerful (cheer) and smart.(2)Cathy didnt expect any award but was still there to cheer on(为喝彩/加油) her friends and praise their accomplishments.7now that既然But now that information is being spread and monitored(监控) in different ways，r
15、esearchers are discovering new rules. 但是因为信息正以不同的方式传播和监测，所以研究人员正在研究新的规则。8get the hang of熟悉；掌握；理解9break out突发；爆发break in打断；闯入break up结束；散开；分解break down崩溃，垮掉；出毛病；抛锚break into闯入；突然起来10watch out for密切注意；当心；提防watch over监视；看管keep a watch on注意under watch受监视；被看管1What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.随后它会变成什么
