人教版高中英语必修二第三单元.ppt

1、Unit 3 Computers,keyboard,mouse,monitor,screen,speaker,host computer,Write out all the words you know about computers.,computer,monitor,click,software,search,update,download,Internet,keyboard,下载,网络,软件,键盘,主板,点击,查询,历史,电脑,other useful words and expressions about computer,Network 网络 Website站点 Program程序

2、Virus病毒 Hacker 黑客 Download 下载 Software 软件 Hardware 硬件,Up load 上传 Home page 主页 Password密码 Desk top 桌面 User name 用户名 Click 点击,Look at the following pictures and say their English names.,I. Warming up,An abacus,A calculator,Warming up,huge computer,PC,Warming up,laptop,PDA,robot,Whats next?,Discuss wit

3、h your partner the following questions. What do these pictures have in common? What do they tell you about the development of computers? What do you think will be the next development?,Warming up,(What do they have in common?),I think that In my opinion I believe that Whats your reason? Why do you t

4、hink so?,1.They can be used for calculating. 2.They can deal with maths problems. 3.They are our friends. 4.They are useful and helpful.,Discussion,Work in pairs. Try to put these inventions in an order according to the time when they appeared. Then read the passage quickly and check to see if you w

5、ere right. ( ) analytical machine ( ) laptop ( ) calculating machine ( ) robot ( ) PC ( ) universal machine,II. Pre-reading,2,5,1,6,4,3,The development of computers:,1.Calculating machine,2.Analytical machine,3.Universal machine,4Artificial intelligence,5.Computer,6.Internet,calculate universal simp

6、lify sum operator,vt. 计算 adj. 普遍的；宇宙的 vt. 简化 n. 总数；算术题；金额 n.（电脑）操作员； 接线员,logical logically technology technological revolution,adj. 合逻辑的；合情理的 adv. 逻辑上；合逻辑地； 有条理地 n. 工艺；科技；技术 adj. 科技的 n. 革命,artificial intelligence intelligent solve reality personal,adj. 人造的；假的 n. 智力；聪明；智能 adj. 智能的；聪明的 vt. 解决；解答 n. 真实

7、；事实；现实 adj. 私人的；个人的； 亲自的,personally tube total totally network,adv. 就个人而言；亲自 n. 管；管子；电子管 adj. 总的；整个的 n. 总数；合计 adv. 完全地；整个地 n. 网络；网状物,web application finance mobile rocket,n. 网 n. 应用；用途；申请 n. 金融；财经 n. 可移动的；机动的 n.火箭,explore anyhow (anyway) happiness human race,vt. & vi. 探索；探测；探究 adv. 无论如何；即使如此； 至少 n.

8、幸福；快乐 人类,根据构词法猜测词义 The meaning of the words in group A can all be guessed from their formation. Each pair of words has the same root（词根）. technology technological simplesimplify personpersonal realreality happyhappiness,While-reading,1.Fast reading(Read the passage quickly and check your prediction.

9、What is the main idea of the passage?) This passage is about _.,III. While-reading,the development of computers,根据上下文猜测词义 The meaning of the words in group B can all be guessed from context. Example: revolution: From the previous sentence we know that after the work of the operator, “I could think l

10、ogically and produce an answer quicker than any person”, which indicates a great improvement, so “revolution” here may mean “a complete change”.,While-reading,Useful phrases,calculating machine Analytical machine card with holes technological revolution universal machine artificial intelligence go b

11、y by internet human race,计算器 分析机 穿孔卡 技术革命 万能机,通用机器 人工智能 走过，过去 通过网络 人类,2. Read the passage again. Find the topic sentence of each paragraph and the supporting details. Paragraph 1: Over time I have been changed quite a lot. 1. calculating machine 2. analytical machine 3. universal machine 4. laptop,W

12、hile-reading,Paragraph 2: These changes only became possible as my memory improved. 1. tubes 2. transistors 3. chips 4. network 5. World Wide Web,While-reading,Paragraph 3: Since the 1970s many new applications have been found for me. 1. communications 2. finance 3. trade 4. robots 5. mobile phones

13、6. medical operations 7. space rockets 8. providing a life of high quality,While-reading,Summary A topic sentence sets out the main idea of a paragraph. A topic sentence is usually the first or last sentence of a paragraph.,While-reading,calculating,analytical,universal,mathematical problems,Medical

14、 operations,Memory,Transistors,Applications,Communication,Trade,Task Listening,I began as a _ machine in 1642 in France. In 1822 I was built as an _ machine. Then in 1936 Alan Turing wrote a book and built a _ machine. As the years have_ _ , I have been made _ . There were times when my size _ chang

15、ed. And my memory became _ large _ I couldnt believe it. In the 1960s they gave me a family_ by a network. I was able to _with others through the World Wide Web. Since the 1970s many new applications _ for me.,calculating,Analytical,universal,gone by,smaller,totally,that,connected,have been found,sh

16、are my knowledge,so,Listen to the tape and fill in the blanks,What can you use computers to do?,Computer and Internet,type my homework,draw pictures,play games,communicate with my friends.,gather information for my lessons,listen to music,watch movies,How do you use computers and the Internet?,Yes,N

17、o,I often use a computer to, I sometimes use it to, and I never use it to,Discussion Something to think about:,With the development of computer technology, the internet had become more and more popular among students. However, just as a saying goes, a coin has two sides. The internet brings both adv

18、antages and disadvantages to students. Work with your partners to list some advantages and disadvantages of the internet. Advantages: Disadvantages:,Summary: what have we learned?,1.some words about computers. 2 the development of computers 3.use computer correctly.,advantages we can communicate with friends listen to the music see films & watch news play games do shopping save a lot of time do a lot of useful things,Disadvantages Some people especially the teenagers abandon (沉迷于) themselve