1、Unit1Reading 2TV and audio devices: a review2021/8/8 星期日1Unit 1 課件描述： 這是Reading 板塊的第二課時。由于Reading 板塊的文章不僅為學生提供豐富的信息，同時又富含字、詞、句等語言材料供學生學習，所以第二課時教學主要關(guān)注學生對字詞句等語言知識的學習和運用，如重要短語的理解和用法以及核心詞匯的理解和用法等。2021/8/8 星期日2Important phrases the evolution of video and sound devicesshortly afterwardscontributed to the

2、development of TV. was very primitive and had many drawbacksmade important breakthroughs in the development of the TV in the late 1920s and early 1930sadopt many of the principles2021/8/8 星期日3constructed the first colour TV regular colour TV broadcasts were delayed within a short time Satellites all

3、ow live TV programmes to be broadcast over vast distancesmake TV accessible to people who live far away from citiesthroughout the countryside and the remote areasa small percentage of people benefit from satellite TVbroadcast the signals 2021/8/8 星期日4made the first recording of a human voice used ro

4、und tubes to record onused discs as alternative to tubesbe wound up by hand Times sure have changed!employed steel tape to record onpaper tape also tore easily. by the late 1960s2021/8/8 星期日5Sound and video goes digital.The first CDs were made available. with the adaptation of digital technologymake

5、 things of the pastkeep pace withforesee what the future will bring2021/8/8 星期日6Key words1. contribute2. adopt3. delay4. access5. wind6. tear7. live2021/8/8 星期日7Many different people contributed to the development of TV. contribute (v.) 1. to give money, help, ideas etc. to something that a lot of o

6、ther people are also involved in contribute to/towards City employees cannot contribute to political campaigns. contribute sth. to/towards sth. The volunteers contribute their own time to the project. 2. to help to make something happen contribute to Alcohol contributes to 100,000 deaths a year in t

7、he US.3. to write articles, stories, poems etc for a newspaper or magazine contribute to one of several authors contributing to the book2021/8/8 星期日8Modern TVs adopt many of the principles first discovered by Farnsworth. adopt (v.)1. to start to deal with or think about something in a particular way

8、 adopt an approach/policy/attitude etc. The courts were asked to adopt a more flexible approach to young offenders.2. to take someone elses child into your home and legally become its parent The couple are unable to have children of their own, but hope to adopt a girl. 2021/8/8 星期日9Regular colour TV

9、 broadcasts were delayed inthe UK until 1967. delay (v.)to wait until a later time to do somethingHe delayed his decision on whether to call an election.delay doing sth.Big companies often delay paying their bills.delay sth. until sth.The opening of this section of the road is delayed until Septembe

10、r. 2. to make someone or something lateseriously/badly/slightly etc delayedThe flight was badly delayed because of fog.2021/8/8 星期日10 They also make TV accessible to people who live far away from cities, accessible (adj.)easy to obtain or useaccessible tothe need for an efficient health service that

11、 is accessible to alleasily/readily accessibleComputers should be made readily accessible to teachers and pupils. a place, building, or object that is accessible is easy to reach or get intoThe island is only accessible by boat.There is a church which is easily accessible from my home. someone who i

12、s accessible is easy to meet and talk to, even if they are very important or powerfulI think that youll find shes very accessible. a book, poem, painting etc that is accessible is easy to understand and enjoyHe wants his music to be accessible to everyone.2021/8/8 星期日11access (n.)1. the right to ent

13、er a place, use something, see someone etc access to Access to the papers is restricted to senior management. Cats should always have access to fresh, clean water. 2. how easy or difficult it is for people to enter a public building, to reach a place, or talk to someoneaccess to a house with easy ac

14、cess to the sea 3. to succeed in entering a place or in seeing someone or somethinggain/get access (to sth)The police managed to gain access through an upstairs window. access (vt.)to find information, especially on a computerUsers can access their voice mail remotely.2021/8/8 星期日12The first record

15、players had to be wound up by hand wind (v.) (wound, wound ) 1. to turn or twist something several times around something else wind sth around/round sth The hair is divided into sections and wound around heated rods. 2. to turn part of a machine around several times, in order to make it move or star

16、t working also wind up Did you remember to wind the clock? 3. if a road, river etc winds somewhere, it has many smooth bends and is usually very long wind (its way) through/along etc sth Highway 99 winds its way along the coast. a winding path 4. to make a tape move in a machine wind sth forward/bac

17、k Can you wind the video back a little way - I want to see that bit again.2021/8/8 星期日13 or paper tape, which was easier to use but often broke also tore easily. tear (v.)to damage something such as paper or cloth by pulling it hard or letting it touch something sharpBe careful not to tear the paper

18、.tear sth. on sth.She realized she had torn her jacket on a nail.tear sth. offTear off the slip at the bottom of this page and send it back to us.tear sth. out (of sth.)He tore a page out of his notebook and handed it to her.The paper tears easily. to pull something violently from a person or placet

19、ear sth. from sb./sth.He tore the letter from my hand.tear sth. off sth.High winds nearly tore the roof off the house.2021/8/8 星期日14be torn1. if you are torn, you are unable to decide what to do because you have different feelings or different things that you want Jess was torn by anger and worry. b

20、e torn between She was torn between her love of dancing and her fear of performing in public. 2. if a country or group is torn, it is divided because people in it have very different ideas and are arguing or fighting with each other The country was torn by civil war. She spent two months in the war-

21、torn country.2021/8/8 星期日15 Phrasestear sb. /sth. to shreds/pieces tear apart to cause serious arguments in a group of peopletear at / to pull violently at someone or somethingtear away to make yourself or someone else leave a place when you or they do not want to leavetear down to destroy a buildin

22、g deliberatelytear off to remove your clothes as quickly as you cantear up (1)to tear a piece of paper or cloth into small pieces (2)to remove something from the ground by pulling or pushing it violentlytear up an agreement/a contract etc to say that you no longer accept an agreement or contract2021

23、/8/8 星期日161. Scandal is tearing the government _.2. They threatened to tear _ the peace agreement. 3. The children were screaming and tearing _ each others hair.4. She tore _ his letter and threw it away.5. Trees were torn _ by the storm.6. A lot of the old tower blocks have been torn _ to make way

24、for new housing.7. He was enjoying the fun and couldnt tear himself _.8. We finally managed to tear him _ _ the TV.9. He tore _ his clothes and dived into the water.2021/8/8 星期日17Satellites allow live TV programmes to be broadcast over vast distances, live (adj.)1. a live television or radio programme is seen or heard on television or