1、 M7 U1 Reading The evolution of video and sound devicesLanguage pointsM7 Unit 1 Reading1.shortly afterwards 不久之后2.contribute to 对作出贡献；促成；捐助；给写稿3.made a breakthrough in 在有突破4.in the late 1920s 在二十世纪二十年代晚期5.delayuntil 把推迟到6.in colour 彩色的7.make a recording of 录制zxxkLanguage Points:8.wind up 上发条9.by han
2、d 用手工10.play records 播放录音11.along with 和一道12.with the development of 随着的发展13.benefit from 从受益14.keep pace with跟上步伐1.principle n.原理，法则；道德原则,行为准则I refuse to lie about it;its against my principles.我绝不为此事撒谎；那是违背我的原则的。We stick to the principle that everyone should be treated fairly.我们坚持人人都应该被平等对待这一原则。知识拓
3、展 on principle 出于道德准则 against ones principles 违背某人的行为准则 in principle 按道理，在理论上；原则上，基本上，大体上2.construct vt.建造；修筑，建筑；创建，组成 It took them two years to construct the bridge.他们用了两年时间建这座桥。The board of directors decided to construct a new communication network.董事会决定建立一个新的通信网。知识拓展 construction n.建造，建设；建造物，建筑物；
4、结构 construct a theory/diagram/plan 创立理论；绘制图表；作出规划 be constructed from/of/out of 由建成under construction 在建造中 delay doing sth 推迟做某事 delayuntil 把推迟到 without delay（=immediately）立刻，立即3.delay（1）vt.&vi.（使）推迟，（使）延迟The accident delayed the train for two hours.事故使火车耽搁了两小时。（2）n.延误，延迟；延误（或延迟）的时间My doctor advised
5、 me to give up smoking without delay.我的医生劝我立即戒烟。4.accessible adj.可使用的；可见到的；可到达的；易理解的be accessible to sb.某人可以接触/看到The remote desert area is accessible only by helicopter.只有乘直升机才能进入那遥远的荒漠地区。These documents are not accessible to the public.公众无法看到这些文件。5.access n.接近、进入、通路；接近（或进入）的方法（或权力、机会等）have(no)acces
6、s to （没有机会或不）可以使用 get access to 可以接近、进入e.g.Before liberation,the labouring people had no access to education.e.g.You cant easily get access to him on weekdays.Z。xxkImportant sentences1.John Logie Baird constructed the first colour TV in 1928,but it was not until 1938 that the first colour TV program
7、me was broadcast.2It took more than two decades,though,until 1951,for color broadcasts to begin in the USA.3.They also make TV accessible to people who live far away from cities,and so satellite dishes can often be seen distributed throughout the countryside and remote areas.4.However,most people st
8、ill benefit fromsatellite TV,as local TV companies broadcast the signals they get from satellite receivers to the population living nearby.5.It all began in 1877,when Thomas Edison made the first recording of a human voice on his invention,the record player.Homework:1.Read the text and learn the langagepoints by heart.2.To complete A1 and A2 on page 98 of the Workbook.
