3.1 Unit 3 Welocome to the unit -高一英语同步精品课件（译林版2020必修第三册）

Unit 3 The world online Welcome to the unit What do you usually do online? Shopping Watching videos Playing games online Streaming or downloading Using online social networks Using text messaging like WeChat or QQ Worldwide data Social networking Search information Communication File and data transfer Entertainment I hope we will use the Net to cross barriers and connect cultures. — Tim Berners-Lee n. 障碍，壁垒；关卡；分界线，屏障 The Internet has become the backbone of global industry and modern culture. It is the global system of interconnected computer networks that has connected the world over the past few decades. 互联的计算机网络的全球系统在过去的几十年里把世界连接起来。 互联网已经成为全球工业和现代文化的支柱。 The history of the Internet started in the 1960s. Now, let's read a web page and complete the blanks. The first email was sent ________ by Ray Tomlinson. It was a test message to himself. He wanted to see whether he could ______________ from one computer to another. He chose ______________ to separate the username from the name of his machine. in 1971 send a message the “@” sign The first webcam was created by computer scientists at the University of Cambridge ________. What did it film? A coffee pot _______ the office. These scientists used the webcam to see ______________ whether the pot was empty to avoid wasted trips for coffee. in 1991 outside from their desks Emojis, small digital images used to ________________________ in electronic communication, were created _________ in Japan. The creator was inspired by Japanese comics, street signs and ___________________. Soon emojis __________ throughout the world. Oxford Dictionaries selected, the “Face with Tears of Joy” emoji, as the Word of the Year 2015. express ideas or feelings in 1999 Chinese characters took off take off take in take on practice take down take off took off take time off The Internet history starts in the 1960s. In 1962, MIT computer scientist J.C.R. Licklider comes up with the idea for a global computer network. Only 4