Rapidly developing information technology, We will organize the development of human information transmission.飞速发展的信息技术,整理人类信积传递的发展历程 How have people transmitted information from ancient times to the present?从古至今,人们是如何传递信息的? Beacon fire烽火传递信息 Riding horses to deliver messages骑马送信 Pigeons conveyed messages信鸽传信息 Hand-cranked telephones手摇电话传递信息 Wireless telegraph transmits information无线电报机传递信息 Five stages of human information transmission development人类信息传递发展的五个阶段 Satellite transmission of information卫星传递信息 Information Card资料卡 The first stage is the use of language, which has become an indispensable tool for the exchange of ideas and the dissemination of information; 第一阶段是语言的使用,语言成为人类进行思想交流和信息传播不可缺少的工具; the second stage is the emergence and use of writing, which has made a major breakthrough in the preservation and dissemination of information, transcending the limitations of time and space;第二阶段是文字的出现和使用,使人类对信息的保存和传播取得重大突破,较大地超越了时间和地域的局限; the third stage is the invention and use of printing, which has made books and newspapers an important medium for the storage and dissemination of information; 第三阶段是印刷术的发明和使用,使书籍、报刊成为重要的信息储存和传播媒介; the fourth stage is the use of telephones, radio The fourth stage is the use of telephone, radio and television, which makes human beings enter the era of using electromagnetic waves to spread information;第四阶段是电话、广播、电视的使用,使人类进入利用电磁波传播信息的时代; the fifth stage is the use of computers and the Internet, which makes human beings enter the information age.第五阶段是计算机与互联网的使用,使人类进入信息化时代。 Rapid development of information technology飞速发展的信息技术 Development of telephone communication电话通信的发展 Name of communication tools通信工具名称 Fixed telephone固定电话 Cell phone移动电话 Cell phone移动电话 Cell phone移动电话 Cell phone移动电话 Cell phone移动电话 Date of birth诞生时间 1876年 1973年 1998年 2004年 2008年 2009年 Key Features主要特征 Wired connection有线连接 Wireless electromagnetic wave无线电磁波 Analog voice (first generation communication network)模拟语音(第一代通信网络) Text data (second generation communication network)文本数据(第二代通信网络) Multimedia data (2G)多媒体数据(2G) Multimedia data (3 G network) 多媒体数据( 3 G 网络) Communication function通信功能 Voice call function语音通话功能 Voice call function语音通话功能 Voice call function语音通话功能 Voice call, text message语音通话,文本信息 Voice call,text message,picture,music,internet access,etc.语音通话、文本信息、图片、音乐、上网等 Voice calls, text messages, pictures, music, Internet access, etc.语音通话、文本信息、图片、音乐、上网等 What do these messages tell us?这些信息说明了什么? Information Card资料卡 On September 12, 1958, the world's first microelectronic chip was born。1958年9月12日,世界上第一块微电子芯片诞生。 and 50 years later, almost every home with an electrical appliance has a chip.50年后,几乎每一个拥有电器的家庭都拥有芯片。 A chip, or silicon chip to be exact, is also called an integrated circuit.芯片,准确地说就是硅片,也叫集成电路。 It is the main product of microelectronics technology.它是微电子技术的主要产品。 A computer chip is a thin sheet made of silicon, half the size of a fingernail.计算机芯片是一种用硅材料制成的薄片，其大小仅有手指甲的一半。 A chip is formed by connecting hundreds of microcircuits together and is very small in size.一个芯片是几百个微电路连接在一起形成的,体积很小。 The chip is covered with microcircuits that generate pulses of electricity, and the computer chip uses these microcurrents to perform the operations needed to control computers, automation devices or other equipment.在芯片上布满了产生脉冲电流的微电路,计算机芯片利用这些微电流,就能够完成控制计算机、自动化装置或其他设备所需要的操作。 Imagine the future of information transmission畅想未来的信息传递方式 Unit Evaluation单元评价 My cooperation with my classmates我与同学的合作 I can give constructive ideas in group activities我在小组活动中能提出建设性的意见 Activities that interest me most我最感兴趣的活动 Web sites I know about science我知道的有关科学的网址 The main channels I use to get information我获取信息的主要渠道 My experience of studying this unit我学习本单元的体会 |
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