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1、2021/7/241Before the classYou are supposed to be engaged in the material and in whatever it is that we are discussing in class, not necessarily thinking about getting down every word that I say.Id like you to take active notes rather than passive notes. Write down what can make you feel or learn som
2、ething.Better attention, better understanding of the material if you are actively engaged.Better attention, better understanding of the material if you are actively engaged.You are supposed to be engaged in the material and in whatever it is that we are discussing in class, not necessarily thinking
3、about getting down every word that I say.Id like you to take active notes rather than passive notes. Write down what can make you feel or learn something.2021/7/2421. What did the first TV in your home look like? How big was it? What was the picture like?2. What does the TV you are using now look li
4、ke? How big is it? What is the picture like?3. What are the differences between tape recorders, CD players, MD players and MP3 players?2021/7/2432021/7/244ReviewReviewWords and expressions2021/7/245单词回顾单词回顾学生早读时已预习过本单元单学生早读时已预习过本单元单词，可利用几分钟时间带学生词，可利用几分钟时间带学生快速回顾温习。对单词的熟练快速回顾温习。对单词的熟练度越高，阅读的速率也越高。度越高
5、，阅读的速率也越高。2021/7/246Words Reviewevolutiondrawbackprincipleconstructdelayaccessiblen. 演变，发展，进化演变，发展，进化n. 缺点，缺陷，不利条件缺点，缺陷，不利条件n. 原理，法则，道德原则，原理，法则，道德原则，行为准则行为准则vt. 制造，修筑，建造制造，修筑，建造vt.&vi.（使）推迟，延迟（使）推迟，延迟n. 延误，延迟延误，延迟adj. 可使用的，可接触的，可使用的，可接触的，可到达的，易理解的可到达的，易理解的2021/7/247Words Reviewdistributepercentagere
6、ceivertubediscvt. 使分布，分散；分使分布，分散；分发，分配，分销发，分配，分销n. 百分率，百分比百分率，百分比n. 无线电接收机，听无线电接收机，听筒，受话器，接受者筒，受话器，接受者n. 管子，管状物，伦管子，管状物，伦敦地铁敦地铁n. 唱片，（计算机）唱片，（计算机）磁盘磁盘2021/7/248windcomponenteventuallyportablecassetteWords Reviewvt.&vi.上发条，缠绕，上发条，缠绕，蜿蜒，曲折蜿蜒，曲折n. 组成部分，成分，部组成部分，成分，部件件adv. 最后，终于最后，终于adj. 便携式的，轻便的便携式的，轻便
7、的n. 盒式磁带，卡式磁带盒式磁带，卡式磁带2021/7/249digitalstorageforeseepatentadaptationrelayscepticalWords Reviewadj. 数码的，数字式的数码的，数字式的n. 存储，储藏（空间）存储，储藏（空间）vt. 预料，预见，预知预料，预见，预知n. 专利权，专利证书专利权，专利证书n. 适应，改编本，改写适应，改编本，改写本本vt. 播放，转播；接转，播放，转播；接转，转发转发n. 接力赛，中继设备接力赛，中继设备adj. 怀疑的怀疑的2021/7/2410black-and-whitesatellite dishwind
8、upn. 卫星电视碟形天线卫星电视碟形天线上发条上发条adj. 黑白的黑白的Match2021/7/2411To master some basic knowledge of how to understand headingsTo gain some information about the history, the current situation and the future improvement of video and sound devicesTo master the words and expressions in this reading text2021/7/2412
9、Reading Tips阅读时，可根据阅读任务的不同，阅读时，可根据阅读任务的不同，综合运用综合运用略读略读(skimming)与与扫读扫读(scanning) 。提高快速阅读水平。提高快速阅读水平。2021/7/2413Skimming and scanningSkimming and scanning are two fast reading skills to help to browse text and extract the key points. The skills require practice, but once you have got the hang of them
10、 youll find you can get through a substantial amount of reading in quite a short time. These reading methods make it easier for you to grasp large amounts of material, especially when youre previewing. They are also useful when you dont need to know every word.2021/7/2414 略读略读(skimming)只看文章标题、下标只看文章
11、标题、下标题以及每个部分或者段落第一行，关注题以及每个部分或者段落第一行，关注文章中反复出现的关键词。文章中反复出现的关键词。 略读时，要用充足的时间读懂段落的略读时，要用充足的时间读懂段落的第一句和第二句，因为第一句往往是该第一句和第二句，因为第一句往往是该段的主题句段的主题句(topic sentence)，而第二句，而第二句往往是对前句的延伸往往是对前句的延伸(extension)或进一或进一步的解释步的解释(explanation)。通过略读把握文章大意通过略读把握文章大意2021/7/2415运用扫读运用扫读(scanning)迅速浏览从第三句开始迅速浏览从第三句开始的后面部分的后面
12、部分,搜寻作者对开头两句的支持句搜寻作者对开头两句的支持句(supporting sentences),并同时注意文章中间并同时注意文章中间是否有转折词是否有转折词(transition),因为这些词常常会因为这些词常常会把文章的思路逆转或加入其它重要的信息。把文章的思路逆转或加入其它重要的信息。当读到段落的最后一句时当读到段落的最后一句时,我们又要使用略我们又要使用略读读,这时必须再次放慢速度这时必须再次放慢速度(slow down your pace)直到完全消化作者对段落的小结直到完全消化作者对段落的小结(conclusion),因为该小结有可能与主题句截因为该小结有可能与主题句截然相反
13、或引导读者进入下一个段落。然相反或引导读者进入下一个段落。通过扫读寻找特定信息或特定词组通过扫读寻找特定信息或特定词组2021/7/2416a general idea certain informationtitles and headingsthe first and last sentences of paragraphsthe first and last paragraphspictures and chartsScan the text forkey words and phrases, dates, etc.Do not need toread the whole text.20
14、21/7/2417Understanding headingsappear before each section of a textshow how a text is organizedgive an idea as to the contents of each sectionCan you figure out how the text on Pages 2-3 is organized? (Skimming)2021/7/2418TV(in order of time)Early history of TVThe modern age: satellite TVSound & vid
15、eo recorders(in order of time)Early history of sound recordersSound and video recordersSound and video go digitalThe futureHow this text is organized?2021/7/2419Skimming for general ideas2021/7/2420The information in this article is organized _. A. by paragraphs B. in order of place C. by concepts D
16、. by sub-topicsteam workReading Comprehension ISkimming2021/7/2421Scanning for specific information2021/7/2422ScanningReading Comprehension II1. Who developed the system used for most early TV broadcasts? John Logie Baird.2. Who made the first recording of a human voice? Thomas Edison.3. What were d
17、eveloped by the late 1960s? Portable cassette players and video recorders.2021/7/2423 1. Colour TV became popular within just a few years after it was invented. 2. People without satellite dishes do not benefit at all from satellite TV broadcasts.Reading Comprehension IIIScanning2021/7/24243. Some o
18、f the first tape recorders used plastic tape to record on.4. Records and cassettes do not offer as good a sound quality as CDs.5. New technology will soon make many of the things talked about in the article out of date.2021/7/2425Work out the timeline for the development of video and sound devices.R
19、eading Comprehension IVYearEvent1877The first recording of a human voice was made.18871925Emile Berliner invented a record player that used discs to record on.The first public TV broadcasts were made, in the USA.2021/7/24261929193819621967198219931995Regular public broadcasting began in London.The f
20、irst colour TV programme was broadcast.Satellites were used to broadcast TV.Regular colour TV broadcasts began in the UK.The first CDs were made available.The VCD was born.The DVD was invented.2021/7/2427 Undoubtedly, both TV and audio devices will play an increasingly important role in our future l
21、ife. What other functions would you like them to have in the future? 2021/7/2428Do you think we may have a TV-wall in the future?2021/7/24291. You can obtain information quickly in a text by understanding the headings.2. Think about the meanings: evolution, drawback, principle, delay construct, dist
22、ribute, receiver, tube wind up, keep pace with, text massage keep in touch with, satellite dish2021/7/2430Now 2 mins to test your spelling.1. English-Chinese wind up, receiver, component, portable, digital, cassette, adaptation2. Chinese-English 演变，缺点，制造，存储，专利权，演变，缺点，制造，存储，专利权， 转转播，怀疑的，百分比，预见播，怀疑的，百
23、分比，预见When finished, exchange your papers to see who does the best.2021/7/2431请点击请点击wordword图标图标2021/7/2432Quiz I: Fill in the blanks with words given in the box. (P5 Part E)constructed drawbacks percentageeventually delayed receiver foresawWith the patent of the telephone in 1876, people could now h
24、ave a conversation with each other over a long distance. Many engineers (1) _ that it would be possible to send electrical signals through the atmosphere without relying on foresaw2021/7/2433telephone wires. Some important breakthroughs in the development of radio were made by Nikola Tesla in the US
25、A in 1891. However, Teslas work had many (2) _. The first real radio was (3) _ by Guglielmo Marconi, an Italian, in 1896. Early radios just sent signals made up of dots and dashes. It was not until 1906 that adaptations were made so that radio could relay conversation and drawbacksconstructed2021/7/
26、2434music. Since people were sceptical that the public would want to hear radio broadcasts, the building of radio stations was (4) _ . Only a very small (5) _of radio stations were built before 1920. however, most people had access to a radio (6) _ by the late 1920s and early 1930s. (7) _, radio bec
27、ame the primary means of getting news and entertainment.delayedpercentagereceiverEventually 2021/7/2435Quiz II: 认真阅读课文的认真阅读课文的Reading部分，并部分，并根据所读内容在空格处填入最恰当的单词。根据所读内容在空格处填入最恰当的单词。每空一词。每空一词。The evolution of video and sound devicesEarly history of TVIn 1925, the first public TV broadcasts were made in
28、 the USA.In 1928, the first long-distance TV broadcast was made.Television 2021/7/2436Many people made (1) _ to the development of TV.The years between 1928 and 1951 (2) _ the development of color TV.The modern age: satellite TVIn 1962, satellites were used to broadcast TV.People who live far away f
29、rom cities have(3) _ to TV signals with the help ofsatellite dishes.contributionswitnessedaccess2021/7/2437Sound and video Early history of sound recordersuIn 1877, Edison first (4) _ a human voice.uEmile Berliner invented a record player using discs as (5) _ to tubes.Sound and video recordersuIn 19
30、28, the first tape recorders were made in Germany.recordedalternatives2021/7/2438uIn the early 1950s, tape recorders began using plastic tape instead of (6) _ or paper tape.Sound and video go digitaluIn 1982, the first CDs were made (7) _.uIn 1993, the VCD was born and the DVD was invented in (8) _.
31、steelavailable19952021/7/2439The futureuNowadays sound and video can be stored on a PC, on the Internet, or using some form of (9) _ storage.uTechnology is changing fast, and its future is (10) _ our imagination.portablebeyond2021/7/2440Quiz III.根据短文内容和所给首字母提示，根据短文内容和所给首字母提示，补全所缺单词。补全所缺单词。 Thomas Ed
32、ison was born in Milan, Ohio, on February 11, 1847. He is (1) h_ by people as “king of the invention of the world”. It is (2) e_ difficult to find anyone living today who has not (3) b_ from his inventions. Almost everyone has at least seen an (4) e_light.honoredextremelybenefitedelectric2021/7/2441
33、 In the summer of 1869, the Western Union Telegraph Company asked Thomas Edison to improve a (5) d_ that was used to send financial information. After he made several (6) i_ to the device, thecompany paid him 40,000 dollars for his effort. This large (7) a_ of money (8) p_ Mr. Edison to start his ow
34、n company. He announced that the company would improve existing devices and also work on new inventions according to orders.deviceimprovementsamountpermitted2021/7/2442 Edison was (9) o_ in thinking and creating new things all his life. It was all his hard work and great (10) a_ that helped him win
35、honor from people all over the world.occupiedachievements2021/7/2443Preview Word power about electronic and electrical goods on Pages 6 and 7Preview Grammar and usage on Page 82021/7/2444Homework1. Read the passage again and 2. review the new words and 3. expressions. 4.2. 发挥想象，连词成文发挥想象，连词成文(50-100字字).evolution, drawback, principle, delay, distribute, wind up, component, portable, digital foresee, patent, sceptical2021/7/24452021/7/2446
