人教版高一英语必修2所有精华版课件

1、Unit 3 Computers,Reading WHO AM I?,I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lonely because they dont like me now. Do you know who I am?,abacus,Riddles(谜语):,I am very small. I can be used for calculating. In China, a lot of students u

2、se me when solving mathematical problems. Do you know who I am?,calculator,Riddles(谜语):,I can be used for calculating. Besides, I can also be used for watching DVD, sending e-mail and communicating through the Internet. However, I am not a PC, because Im small enough for you to take me with you.,not

3、ebook computer,Do you know who I am?,Riddles(谜语):,Discussion,What do they have in common?,I think that In my opinion I believe that Why do you think so? Whats your reason?,I think they all can calculate something.It can deal with some maths problems.,I believe that they are our good friends.In our e

4、veryday life. We can not finish our work quickly without them.,In my opinion ,people improve abacus,make it more useful and make it a computer.They are being used widely and conveniently in the world.,Have the computer and Internet become part of your life? What can you use them to do?,THINKING,I us

5、e the computer or Internet to:,type my homework draw pictures play games communicate with my friends. gather related information for my lessons buy the things I like, eg books and clothes. listen to music watch movies.,How much do you know about a computer?,Give the English name of the following pic

6、tures of the computer components (组件),What is it in English?,Main board(主板),What is it in English?,CPU (central processing Unit) 中央处理器,What is it in English?,hard disc,What is it in English?,floppy disc,What is it in English?,Keyboard (键盘),What is it in English?,monitor,screen,What is it in English?

7、,mouse 鼠标,DVD ROM,Digital Versatile Disc Read Only Memory 数字通用光盘,What is it in English?,What is it in English?,Printer,What is it in English?,Modem（调制解调器）,Complete the sentences with some of the words in the box.,Monitor, mouse, keyboard, hard disc, floppy disc ,CD-ROM, printer, modem,A_ is used to

8、see your data on a computer . A_ or disk is the main device that a computer uses to store information. A _is a machine for printing text or pictures onto paper ,especially one connected to the computer.,monitor,hard disk,printer,Monitor, mouse, keyboard, hard disc, floppy disc ,CD-ROM, printer, mode

9、m,A_ is used to put data into a computer . A_ _is often used to connect computers to each other though phone lines . Data can also be stored in a _,which is small and can be carried easily. A_ is a disc that contains computer data. It can store a large amount of data.,keyboard,modem,floppy disc,CD-R

10、OM,Look at the pictures and use some adjectives to describe her/his feelings.,Free! Easy! Fast! Quick!,Useful phrases,calculating machine Analytical machine card with holes technological revolution universal machine artificial intelligence go by 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

11、走过，过去 通过网络 人类,other useful words and expressions about computer,Network 网络 Website 站点 Program 程序 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,Whats the main idea of this passage? A. The development of computers B. The d

12、evelopment and use of computers C. A machine which is simple-minded D. Computers may replace human being,Fast-reading,B. The development and use of computers,( ) I began as a calculating machine in Japan in 1642. ( ) In 1936, I grew rapidly both in size and in brainpower. ( ) As time went by, I was

13、made bigger. ( ) Since the 1970s many new applications have been found for me.,2. True or False,F,T,F,T,The computer began as a calculating machine.,1936,The computer had grown as large as a room.,1960,Computers were used in offices and homes.,3.Table-filling,A. Read the passage carefully and find t

14、he topic sentences and the details supporting them.,Further-reading,Over time I have been changed quite a lot,These changes only become possible as my memory improved,Since the 1970s many new applications have been found for me,calculating machine analytical machine universal machine pc laptop,tubes

15、 transistors chips network world wide web,communications finance trade robots mobile phones medical operations space rockets providing a life of high quality,Now we are to read the text once again and underline all the expressions in the text. Put them down into your notebook after class as homework.,B. Read aloud and underline expressions,I, the _, was a calculating machine in 1642 in _.In 1936, I became a “_ machine” to _any mathematical problem. Since the 1970s I have been used first as a _ and then as a _in office and _. Many changed have happened to my _, so my _totally changed.