北师大版高中英语选修7课件：Unit 20 Period Three

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1、Unit 20 New Frontiers,基础自测,内容索引,要点探究,达标检测,课文预读,Period Three Lesson 3 Scientific Breakthroughs,基础自测,.重点单词 1. n.困境，进退两难的窘境 2. n.步骤；程序 3. vt.捐赠；赠送n.捐赠；赠送；捐赠物 4. vi.通信；符合 5. adv.同时 6. vi.分开，分离 7. adj.最重要的,dilemma,procedure,donate donation,correspond,meanwhile,split,premier,8. adj.直言的，坦率的 9. n.后果，结果 10.

2、vt.治愈 11. vi.努力解决；摔跤；搏斗 12. n.专利,outspoken,outcome,cure,wrestle,patent,.重点短语 1. 更不用说 2. 在到之间变化或变动 3. 计算出；弄清楚 4. 依据，按照 5. 转向；求助于；翻到 6. 熄灭,not to mention,range from.to.,figure out,according to,turn to,go out,.重点句式 1.be doing.when.正在做这时 In the summer of 1905，this outspoken young man his one-year-old ba

3、by he was suddenly inspired. 1905年的夏天，这位直率的年轻人正摇着他一岁大的孩子，这时他突然产生了灵感。,was rocking,when,2.“介词关系代词”引导定语从句 He double-checked and saw a blue mould in the dish the bacteria had been destroyed. 他仔细检查了一下，看到碟子里有一种蓝色的霉斑，其周围的细菌都被消灭了。 3.There is no doubt.是毫无疑问的。about it.关于这一点是毫无疑问的。,around which,There is no dou

4、bt,课文预读,.课文判断正(T)误(F) 1.The person who discovered penicillin was Alexander Fleming.( ) 2.Fleming had been studying bacteria in his laboratory when the discovery happened.( ) 3.During the Second World War，Flemings discovery helped to cure plenty of people.( ) 4.Percy Spencer discovered microwaves by

5、mistake.( ),T,F,T,T,.课文阅读理解 1.Why would people have a real dilemma，if they had to choose the single most important discovery of the 20th century? A.Because different people have different ideas and its difficult to choose. B.Because there were no great discoveries in the 20th century. C.Because ther

6、e was no common standard to judge. D.Because so many amazing discoveries were made in medicine，communications，transport and many other fields，and they all had a great influence on the world.,答案,1,2,3,4,5,2.How did Einstein think of the equation “Emc2”？ A.When he was at work. B.His assistant helped h

7、im. C.When he was rocking his one-year-old baby，he was inspired. D.His dream inspired him.,答案,1,2,3,4,5,3.Whose discovery can be used to save peoples lives according to the text? A.Alexander Flemings. B.Edwin Hubbles. C.Albert Einsteins. D.Eckert and Mauchlys.,答案,1,2,3,4,5,4.Whats the original purpo

8、se of designing the first computer? A.To do some difficult experiments. B.To improve the accuracy of the missiles. C.To help people make mathematics calculations. D.To replace the missiles，becoming a new weapon.,答案,1,2,3,4,5,5.Which of the following is NOT true according to the text? A.Hubble discov

9、ered our galaxy is bigger than we thought it was. B.The blue mould was in fact the natural form of penicillin. C.Today its impossible to donate your heart to hospital when you die. D.The first computer was hard to program.,答案,1,2,3,4,5,.课文难句分析 He discovered small areas of mist which were in fact gal

10、axies like our own，millions of light years away from us，which proved that the universe was vastly larger than had previously been thought. 句式分析 句中有两个which。第一个which引导 从句；第二个which引导 从句。 自主翻译 _ _,限制性定语,他发现的小的雾区实际上是像我们的银河系一样的星系，离我们有几百万光年之远。这个发现证明了宇宙比我们以前认为的要大得多。,非限制性定语,要点探究,Medical advances ranged from

11、discovering the causes of diseases under microscopes to surgical procedures replacing diseased organs with donated ones. 人们在显微镜下发现了致病的原因，掌握了用捐献的器官来替换病变的器官的外科手术程序，诸如此类都是医学取得的进步。,range from.to.在到之间变动 range v.变动，排列；n.范围；幅度 a range of一系列；一些；一套,重点词汇,(1)The national park has a large collection of wildlife

12、，ranging from butterflies to elephants. 国家公园有一大批野生生物，从蝴蝶到大象都有。(2017北京) (2)Our funds were limited，and none of the houses in our price range seemed satisfactory. 我们的资金有限，而且在我们价格范围内的房子看起来都不令人满意。 (2015天津),(3)To answer these questions，Brooks surveys disciplines. 为了回答这些问题，Brooks调查了大量的学科。(2015湖北) 单句改错 (4)R

13、anged from 5 to 100 dollars，the prices are reasonable.,a wide range of,Ranging,(5)Our school will donate 500 copies of books to your class. 我们学校将向你们班捐赠500本书。(2015天津) (6)We want to make a (donate) to the Project Hope，so we are organizing a charity show. 我们想为希望工程捐款，所以我们正在组织一场慈善演出。,donation,.the way we

14、 correspond went from writing letters to emailing. 我们通信的方式由过去的书信发展为电子邮件。,correspond vi.通信；相类似；相应；一致；符合 correspond with sb. 与某人通信 correspond with/to与一致；符合 in correspondence with与有通信联系；与一致,(1)Have you been corresponding with him since you graduated from the university? 自从大学毕业后，你一直和他通信吗？ (2)The transla

15、tion does not correspond to/with the original. 译文不符合原意。 (3)What she has just said isnt in (correspond) with the views of the majority. 她刚才所说的同大多数人所持的观点不一致。,correspondence,句型转换 (4)Your account of events does not correspond with hers. Your account of events does not hers. Your account of events is not

16、 hers.,agree with,in correspondence with,We started flying around the world and meanwhile，scientists figured out how to split the atom，previously thought to be the smallest particle of matter in the universe. 我们开始坐飞机环游世界，与此同时，科学家们还掌握了分裂原子的方法，原子先前被认为是宇宙中最小的颗粒。,meanwhile(meantime) adv.同时，其间；n.其间 in th

17、e meanwhile/meantime在此期间；与此同时 for the meanwhile/meantime目前；眼下；暂时,(1)My daughter went to see her piano teacher this morning. Meanwhile/ Meantime，I went shopping. 我女儿今天上午去见了她的钢琴老师。在此期间，我去购物了。 (2)We need some new curtains，but these will do _. 我们需要一些新窗帘，但这些暂时还可以用。,for the meanwhile/,meantime,一句多译 (3)我做作

18、业的同时，我的老师正在备课。 I was doing my homework _my teacher was preparing lessons. I was doing my homework my teacher was preparing lessons. I was doing my homework my teacher was preparing lessons.,and (in the) meanwhile/meantime,and at the same time,while,(4)If you dont understand something，you may researc

19、h，study，and talk to other people until you figure it out. 如果不了解某个事物，你可以研究、学习、与他人探讨，直到弄清楚。 (2017北京) (5)Have you figured the cost of food for our holiday？ 你把咱们度假的食物费用计算进去了吗？ (6)I hadnt figured getting home so late. 我没有预料到这么晚才回到家。,in,on,一词多义 写出下列句子中figure out的汉语意思 (7)I cant figure out why he quit his j

20、ob. _ (8)Have you figured out how much the holiday will cost？ _,理解，弄明白,计算出,During the Second World War，when Flemings discovery was first helping to cure people，the US Navy was looking for ways of improving the accuracy of their missiles. 在二战期间，当弗莱明的发现首次帮助救治病人时，美国海军正在寻找提高导弹命中率的方法。,cure vt.治疗，治愈；改正；n.

21、疗法，治疗；纠正；措施，对策 cure sb. of.矫正某人的；治愈某人的 a cure for.针对的治疗,(1)The fresh air and exercise cured him of his headache. 呼吸新鲜的空气和运动治好了他的头疼。 (2)The destruction of such species could prevent researchers from finding cures certain diseases. 这些物种的破坏会妨碍研究人员找到治疗某些疾病的方法。(2015陕西) 易混辨析 cure，treat cure表示“治愈”，宾语既可以是人，

22、也可以是疾病，有时也表示“矫正；革除”。 treat表示“治疗”时，多接人作宾语，强调“治疗”这一动作，并不说明是否治愈。,for,选词填空 cure，treat (3)The doctor was the girl who suffered from cancer. (4)Who was it that the old professor of his cancer?,treating,cured,The navy turned to Eckert，an engineer，and Mauchly，a physicist，to wrestle with the problem and prod

23、uce a machine to do the job. 海军部队向工程师埃克特和物理学家莫克利求助，希望他们能够设法解决这个难题，并研制一种可以做这项工作的机器。,turn to求助于；转向；翻到；变成(to为介词，后跟名词或动名词) turn on打开 turn down (音量等)调低；拒绝 turn off关上 turn out证明是，结果是,(1)We should turn our thoughts to practical matters. 我们应把思想转向实际问题。 (2)She the job offer because she wanted a higher wage. 她

24、拒绝了那个工作邀请因为她想要更高的工资。 一词多义 写出下列句子中turn to的汉语意思 (3)I always turn to my parents whenever I need help. _ (4)Please turn to page 10. _ 单句改错 (5)She has nobody to turn.,turned down,求助于,翻到, to,经典句式,In the summer of 1905，this outspoken young man was rocking his one-year-old baby when he was suddenly inspired

25、. 1905年的夏天，这位直率的年轻人正摇着他一岁大的孩子，这时他突然产生了灵感。,(1)句中用了“be doing.when.”结构，其中when为并列连词，意为“这时(突然)”。 (2)when作并列连词时还常用于下列句式中： be about to do.when.正要做这时(突然) be on the point of doing.when.正要做这时(突然) had just done.when.刚做完这时(突然),(1)I was driving down to London when I suddenly found that I was on the wrong road. 我

26、正开车去伦敦，这时突然发现我走错路了。(2017天津) (2)He was about the police came. 他正准备逃跑，这时警察来了。 (3)I my exam papers the bell rang. 我刚做完试卷铃就响了。 (4)He was on the point of leaving someone knocked at the door. 他正要走，这时有人敲门。,to run away when,had just finished when,when,单句改错 (5)I was watching TV as the telephone rang.,when,He

27、 double-checked and saw a blue mould in the dish around whichthe bacteria had been destroyed. 他仔细检查了一下，看到碟子里有一种蓝色的霉斑，其周围的细菌都被消灭了。,around which the bacteria had been destroyed是一个定语从句，修饰a blue mould。 “介词which从句”作定语，修饰名词，可以作限制性定语从句，也可以作非限制性定语从句，不能用that代替which；当介词置于从句的末尾时，that可以代替which。 类似的结构：“介词whom从句”

28、修饰的先行词是人。,(1)I bought a great many books，on which I spent all my money that I saved. 我买了很多书，这些书花了我积攒的所有钱。 (2)Scientists have advanced many theories about why human beings cry tears，none of which has been proved. 科学家们已经提出许多关于为什么人类哭泣时会流泪的理论，其中没有一个得到证实。(2016浙江) (3)Many young people，most of were well-ed

29、ucated，headed for remote regions to chase their dreams. 很多年轻人前往偏远地区去追逐梦想，他们中的大多数人都受过良好的教育。,whom,句型转换 (4)The English play which my students acted in at the New Years party was a great success. The English play my students acted in at the New Years party was a great success. The English play my studen

30、ts acted at the New Years party was a great success.,that,in which,There is no doubt about it.关于这一点是毫无疑问的。,(1)There is no doubt that I will enhance its reputation through my efforts. 毫无疑问，我将通过我的努力来提高它(天津市)的名声。(2017天津) (2)There is some doubt whether she will come on time. 她是否能准时来有点让人怀疑。 (3)If you hav

31、e any doubts your health，youd better consult your doctor at once. 如果你对自己的健康状况有所怀疑的话，你最好马上咨询医生。 (4)I really doubt we can finish the work ahead of time. 我的确怀疑我们能否提前完成工作。,about,whether/if,单句改错 (5)There is no doubt whether we did the right thing.,that,达标检测,.单句语法填空 1.He spent all the day (wrestle) with t

32、he difficult problem. 2.It took them about one month to figure how to start the equipment. 3.It is proved that the medicine will be a cure lung cancer. 4.In our class there are 46 students，half of wear glasses. 5.One can always turn music for comfort. 6.There are two hundred boys (range) from seven

33、to fourteen in age.,wrestling,out,for,whom,to,ranging,7.He asked for a (donate) but went away empty-handed. 8.This medicine can cure you your toothache. 9.Franks dream was to have his own shop which to produce the workings of his own hands. 10.She still corresponds American friends she met nine year

34、s ago.,donation,of,in,with,.完成句子 11.我如果看过这场电影，我就会把电影内容告诉你了。 If I had seen the film，I you about it. 12.Maria写了两部小说，都被拍成了电视剧。 Maria has written two novels， have been made into television series. 13.他的研究会成功是毫无疑问的。his success in his study.,would have told,both of which,There is no doubt about,14.妈妈正在打扫房

35、间，与此同时，爸爸正在做饭。 Mother was cleaning the room. _ _，father was cooking. 15.我们正在湖里游泳，这时突然下起了暴雨。 We in the lake the storm started.,Meanwhile/Meantime或In the meanwhile /meantime,were swimming,when,.课文短文改错 In just 100 years，the world changed complete. Amazed discoveries were made in many ways.Although it i

36、s impossible to choose the most important discovery，but it is possible to single out few pioneers of the 20th century.“Emc2” was born when Albert Einstein is suddenly inspired.,completely,Amazing,was, a,Edwin Hubble，an astronomer，discovered small area of mist where were in fact galaxies.Alexander Fleming discovered a natural form of penicillina blue mould.The worlds first computer were produced by Eckert，an engineer and Mauchly，a physicist. With these breakthroughs，the world would have been a completely different place.,which,the,was,areas,Without,