新概念第三册 LessonPPT课件

1、Lesson54 Multiple Choice1.b 2.d 3.a 4.c 5.c 6.a 7.c 8.d 9.b 10.b 11.b 12.c 第1页/共47页第2页/共47页NASA(National Aeronautics and Space Administration)美国航空航天局第3页/共47页Lesson 55 From the earth: GreetingsLing第4页/共47页Do you believe in aliens?Watch the viedo.第5页/共47页Question:Do you believe in aliens?第6页/共47页FROM

2、THE EARTH:GREETINGS第7页/共47页Which life forms are most likely to develop on distant planet?uIt would be bacteria and plant life.Why is it major achievement to be able to find new planets in space?uBecause they are (relatively speaking) very small and do not emit light.第8页/共47页Why cant all planets supp

3、ort life?uNot all planets can support life because conditions have to be just right: the size and brightness of its star (orsun) have to be just right, too.What will be one of the great astronomical projects of the twenty-first century?uIt will be the development of a telescope capable of detecting

4、the presence of life on distant planets.第9页/共47页astronomyrelative infinitelysolarVenusMarsorbit astronomicalgenerateparticleJupiterblotanalysebacteriaoxygenrealmendeavourNew words and expressions第10页/共47页The Solar Systemorbit第11页/共47页 solar adj. 太阳的；太阳能的 system 太阳系 radiation 太阳辐射 cell 太阳能电池 lunar ad

5、j. 月球的；月亮的 a eclipse 月食第12页/共47页 a total solar eclipse a total lunar a partial solar a partial lunar 全食，偏食第13页/共47页 orbit n. (天体等运行的）轨道 be put into around the earth 被送上了环绕地球的轨道 （人、组织等的）影响范围、势力范围 come/fall/be within sbs 进入/落入/属于某人的势力范围 v. (around) sth 沿轨道运行；围绕.运动 e.g - The earth takes a year to orbit

6、 the sun.第14页/共47页 astronomy n. 天文学 astronomical adj. 天文学的;(数量、价格等）极其巨大的 e.g - The figures are . 这些都是天文数字。 astronomer n. 天文学家 Words relate to astronomy:第15页/共47页 astrology 占星学 astronaut 宇航员 astrophysics 天体物理学 Big Dipper 北斗七星 cluster 星团 constellation 星群，星座 cosmos 宇宙 cosmology 宇宙学 galaxy 星系 milky way

7、银河系 meteor 流星 nebula 星云 polestar 北极星 revolution 公转 rotation 自转 astro-: star第16页/共47页Close your book and listen again.第17页/共47页Recent developments in astronomy have made it possible to detect planets in our own Milky Way and in other galaxies.detect v. 发现，查明detectable adj. 察觉得到的detective n. 侦探make 使变

8、得，使成为“make+宾语+宾语补足语”第18页/共47页小结：一、“make宾语n.” 意为“使、让某人 / 某物(成为)”。如：e.g - We made him captain of our football team. 我们推选他作我们足球队队长。二、“make宾语adj.” 意为 “使某人 / 某事(变得)”。如：e.g - The news that our team had won made us very happy. 我们队赢了的消息使我们大家非常高兴。 第19页/共47页三、“make宾语do sth.（不带to的不定式）”意为 “使某人做某事”。如:e.g - Our t

9、eacher makes us feel more confident. 老师使得我们感到更自信了。四、“make宾语-ed（过去分词作宾补）”这个结构指宾语接受后面的那个动作，表示被动的意思，意为 “使某人 / 某事被”。如：e.g - The strange noise made us frightened. 奇怪的声音使我们感到恐惧。e.g - The good news made us excited. 这个好消息使我们兴奋。第20页/共47页This is a major achievement because, in relative terms, planets are very

10、 small and do not emit light.in relative terms 相对来说relative adj. 相比较而言的e.g - 幸福是一个相对的概念。 - Happiness is a concept.relativity n.相对性the throry of 相对论第21页/共47页Finding planets is proving hard enough, but finding life on them will prove infinitely more difficult.译1：光是想出这个主意已经很困难了，实行起来更是难上加难。Just coming u

11、p with this idea is proving hard enough, but putting it into practice will prove infinitely more difficult.第22页/共47页译2：找到一份工作已属不易，找一份高薪的工作就更是难上加难了。Finding a job is proving hard enough, but finding one with a high salary will prove infinitely more difficult.第23页/共47页infinitely adv. 无限地，无穷地;非常e.g - 你的

12、英语比我的德语好太多了。 - Your English is better than my German.e.g - 人类的适应力是无限的。 - Human beings are adapatable.infinite adj. infinity n.第24页/共47页To see a world in a grain of sandAnd a heaven in a wild flower,Hold infinity in the palm of your handAnd eternity in an hour.William BlakeTo see a world in a grain o

13、f sand一沙见世界,一花窥天堂。手心握无限,须臾纳永恒。在一颗沙粒中见一个世界，在一朵鲜花中见一片天空，在你的掌心里把握无限，在一个钟点里把握无穷。从一粒沙看世界，从一朵花看天堂，把永恒纳进一个时辰，把无限握在自己手心。一花一世界，一沙一天国，君掌盛无边，刹那含永劫。第25页/共47页The first question to answer is whether a planet can actually support life.to answer不定式做后置定语whether a planet can actually support life是表语从句第26页/共47页In our

14、own solar system, for example, Venus is far too hot and Mars is far too cold to support life.far可以与too及原级形容词连用，表“太过于”e.g - It is far too dangerous to go out in a storm - 暴风中外出太过危险。e.g - He is far too busy to deal with the trifles - 他太忙碌，无暇处理这些琐碎的事情。第27页/共47页Only the Earth provides ideal conditions,

15、and even here it has taken more than four billion years for plant and animal life to evolve.Whether a planet can support life depends on the size and brightness of its star, that is its sun.depend on依赖,依靠;取决于,随而定e.g - 结果将依我们表现的好坏而定。 - The outcome will depend on how well we perform.第28页/共47页Imagine a

16、 star up to twenty times larger, brighter and hotter than our own sun. A planet would have to be a very long way from it to be capable of supporting life.Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect condition

17、s for life forms to vide sb. with vide sth. for sb.第29页/共47页But how would we find such a planet? At present, there is no telescope in existence that is capable of detecting the presence of life.at present现在,目前in existence 存在come into existence 开始存在believe in the existence of . 相信.的

18、存在第30页/共47页 他过去不相信上帝的存在，但是现在他相信了。 He didnt believe in the existence of God, but now he does. 这是现存最古老的希伯来语（Hebrew）手稿。 This is the oldest Hebrew manuscript in existence. 巴基斯坦（Pakistan）在战后开始作为一个独立的国家存在。 Pakistan came into existence as an independent country after the war.第31页/共47页It is impossible to lo

19、ok for life on another planet using earth-based telescopes.-based 以.为重要部分（或特征）；以.为主e.g - lead-based paints - 铅基涂料e.g - 以阶级为特征的社会 - a class-based society第32页/共47页Our own warm atmosphere and the heat generated by the telescope would make it impossible to detect objects as small as planets.generate hea

20、t/electricity/power/income/profit new ideas intereste.g - 严重的失业会引发一系列社会问题。 - Serious unemployment will generate a series of social problems.第33页/共47页Even a telescope in orbit round the earth, like the very successful Hubble telescope, would not be suitable because of the dust particles in our solar

21、system.particle 颗粒；微粒e.g - There is not a particle of truth of what he said. - 他的话没有一点是真的。第34页/共47页 e.g - 没有丝毫支持这个论点的证据。 - There was not a particle of truth of evidence to support the case. (physics) 粒子 accelerator 粒子加速器第35页/共47页Once we detected a planet, we would have to find a way of blotting out

22、the light from its star, so that we would be able to see the planet properly and analyze its atmosphere.so that目的状语从句so that“以便，为了”引导一个表示目的的状语从句，此时可与 in order that 换用；从句谓语中常用情态动词 may/might, can/could, should, would 等；analyze = analyse (NAmE)analysis n.第36页/共47页 blot v. (-tt-) 遮盖；有意地忘记 n. 污点；墨渍 blot

23、sth out / blot out sth e.g - Clouds blotted out the sun. - He tried to blot out the image of Helens sad face. idom: a blot on the landscape 影响景观的物体（尤指丑陋的建筑物）第37页/共47页In the first instance, we would be looking for plant life, rather than little green men.for instance 例如in the first instance 第一；首先e.g

24、- 起初我想拒绝，但后来还是重新考虑了。 - In the first instance I was inclined to refuse, but then I reconsidered.第38页/共47页The life forms most likely to develop on a planet would be bacteria.bacteria plural or singular ?bacteriumdatumdata, mediummedia, bacteriumbacteria, curriculumcurricula第39页/共47页For most of the earths history they have been the only form of life on our planet.But this hope is always in t