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the internet and telecommunications教案
module 6 the internet and telecommunications
话题导入
电脑网络是我们日常生活中的重要工具,如果没有了它,这个世 界不知会变得如何?电脑网络能处理的事情太多了,衣、食、住、行、吃、喝、玩、乐、电子采购、电子公文交换、电子支付、电子保健、电子监理等等,都和电脑脱不了关系,它还能把事情整理得井井有条。在以后的岁月中,不懂电脑网络的人很可能寸步难行!
背景知识
the first computer
世界上第一台电子数字式计算机于1946年2月15日在美国宾夕法尼亚大学正式投入运 行,它的名称叫eniac(埃尼阿克),是电子数值积分计算机(the electronic numberical integrator and computer)的缩写。它使用了17468个真空电子管,耗电174千瓦,占地170平方米,重达30吨,每秒钟可进行5000次加法运算。虽然它的功能还比不上今天最普通的一台微型计算机,但在当时它已是运算速度的绝对冠军,并且其运算的精确度和准确度也是史无前例的。
computer network
将地理位置分散的计算机通过专用的电缆或通信线路互相连接,就组成了计算机网络。网络可以使分散的各种资源得到共享,使计算机的实际效用提高了很多。计算机联网不再是可有可无的事,而是计算机应用中一个很重要的部分。人们常说的因特网(internet,也译为国际互联网)就是一个通过通信线路连接、覆盖全球的计算机网络。通过因特网,人们足不出户就可获取大量的信息,与世界各地的亲友快捷通信, 进行网上贸易等等。
引入型阅读
tim berners-lee and the internet
tim berners-lee is the man who wrote the software(软件) programme that led to the foundation of the world wide web.britain played an important part in developing the first generation(第一代) of computers.the parents of tim berners-lee both worked on on e of the earliest commercial(商业的) computers and talked about their work at home.as a child he would build models of computers from packaging material.after graduating from oxford university he went on to the real thing.in the 1980’s,scientists were already using a primitive version(原始版本) of e-mail.while working at a laboratory in swi tzerland tim berners-lee wrote a programme which let him store these messages.in 1990 he wrote the http(服务程序所用的协议) and html(超文本链接标示语言) programmes which formed the basis o f the world wide web.
the next year his programmes were placed on to the internet.everyone was welcome to use them and improve them if they could.programmers used his codes(编码) to work with different operating systems (系统).new things like web browsers(浏览器) and search engines were developed.between 1991 and 1994 the number of web pages rose from 10 to 100 000.
in 1994 tim berners-lee formed the newly-formed world wide web co nsortium(协会) or w3c.more than 200 leading companies and laboratories are represented(代表) by w3c.t ogether they make sure that everyone can participate(参加) equally on the web.共2页，当前第1页12The Internet and Telecommunications教案
1.the main idea of this passage is ______.
a.when the internet appeared
b.why computers develop so rapidly
c.how the world wide web started
c.how tim berners-lee formed w3c
2.scientists began to use e-mails______.
a.in the 1960’s
b.before 1990
c.after the 1980’s
d.in 1980’s
3.which of the following is not true ?
a.the world wide web will have an effect on social development.
b.the number of web pages rose very rapidly in the 1990’s.[.com]
c.tim berners-lee made a great contribution to the compu ter science.
d.tim’s programmes were placed on to the internet in 1990.
答案:1.c 2.d 3.d共2页，当前第2页12The Internet and Telecommunications教案 |
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发表于 2021-9-7 01:51:02
