Unit 3 Welcome to the unit 课件-2022-2023学年高一下学期英语牛津译林版（2020）必修第三册.pptxVIP

Unit 3 The world onlinewelcome to the unit Learn some facts about the Internet.Discuss some questions about the Internet.Learning objectives The Internet is the biggest source of information in the world Interneta computerand it’s accessible(可获得的) through ___________. Task 1---Lead -in cross barriersbarrier: 障碍 connect culturesI hope we will use the Net toand . --- Tim Berners-Lee我希望我们能用互联网跨越障碍, 联结文化。 — 蒂姆·伯纳斯·李 When you are surfing the Internet, what do you usually do?Task 2---Free talk 1. to obtain information or resources 2. to shop or chat 3. to entertain ourselves Task 3--Some facts about the InternetThere are many important milestones (里程碑) in the development of the Internet. Let’s learn some facts about it one by one. We can see the “@” sign of an email address. The first email was sent in 1971 by Ray Tomlinson. It was a test message to himself. He wanted to see whether he could send a message from one computer to another. He chose the @ sign to separate the username from the name of his machine.the______ of the first emailorigin We can see a webcam.The first webcam was created by computer scientists at the University of Cambridge in 1991. What did it film? A coffee pot outside the office. These scientists used the webcam to see from their desks whether the pot was empty to avoid wasted trips for coffee.What was the first webcam used for?Say something about it in your own words. We can see some emojis. Emojis, small digital images used to express ideas or feelings in electronic communication, were created in 1999 in Japan. The creator was inspired by Japanese comics, street signs and Chinese characters. Soon emojis took off throughout the world. Oxford Dictionaries selected , the Face with Tears of Joy emoji, as the Word of the Year 2015.Emojis are _________________ for _________ ideas or feelings. Japanese comics, street signs and Chinese characters are the __________ for their