英语必修二第三单元课文

1、Unit 3 Computers,Reading,Send or receive emails ,C O M P U T E R,Unit 3 Computers,keyboard,mouse,monitor,screen,speaker,host computer,camera,1,2,3,4,5,6,7,What is it in English?,CPU (central processing Unit) 中央处理器,What is it in English?,Main board(主板),What is it in English?,hard disc 硬盘,What is it i

2、n English?,display card 显卡,DVD ROM Digital Versatile Disc Read Only Memory 数字通用光盘,What is it in English?,The first computer?,The first calculating machine was invented by Pascal in France in 1642.,In the early 1960s, people could communicate with each other through World Wide Web.,Who am I ?,Reading

3、:,I began as a calculating machine in France in 1642. Although I was young I could simplify difficult sums. I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage. After I was programmed by an operator who used cards with holes, I

4、could think logically and produce an answer quicker than any person. At that time it was considered a technological revolution and the start of my artificial intelligence. In 1936 my real father, Alan Turing, wrote a book about how I could be made to work as a universal machine to solve any difficul

5、t mathematical problem. From then on, I grew rapidly both in size and in brainpower. By the 1940s I had grown as large as a room, and I wondered if I would grow any larger. However, this reality also worried my designers. As time went by, I was made smaller. First as a PC (personal computer) and the

6、n as a laptop, I have been used in offices and homes since the 1970s.,Over time I have been changed quite a lot.,First it was stored in tubes, then on transistors and later on very small chips. As a result I totally changed my shape. As I have grown older I have also grown smaller. Over time my memo

7、ry has developed so much that, like an elephant, I never forget anything I have been told! And my memory became so large that even I couldnt believe it! But I was always so lonely standing there by myself, until in the early 1960s they gave me a family connected by a network. I was able to share my

8、knowledge with others through the World Wide Web.,These changes only became possible as my memory improved.,I have become very important in communication, finance and trade. I have also been put into robots and used to make mobile phones as well as help with medical operations. I have even been put

9、into space rockets and sent to explore the Moon and Mars. Anyhow, my goal is to provide humans with a life of high quality. I am now truly filled with happiness that I am a devoted friend and helper of the human race!,Since the 1970s many new applications have been found for me.,Paragraph 1: Over ti

10、me I have been changed quite a lot. calculating machine analytical machine universal machine PC laptop Paragraph 2: These changes only became possible as my memory improved. tubes transistors chips network World Wide Web Paragraph 3: Since the 1970s many new applications have been found for me. comm

11、unications finance trade robots mobile phones medical operations space rockets,Fill in the blanks,The computer began as a calculating machine.,1936,The computer had grown as large as a room.,1960s,Computers were used in offices and homes.,The computer is a devoted friend and helper of the human race

12、.,The computer grew rapidly both in size and in brainpower.,Although I was young I could simplify difficult sums.,simplify: to make something easy to do or understand,I have been put into space rockets and sent to explore the moon and the Mars.,explore: travel to a place in order to know about it,un

13、til in the early 1960s they gave me a family connected by a network. I was able to share my knowledge with others through the World Wide Web.,connect: bring something together,Since the 1970s many new applications have been found for me. I have become very important in communication, finance and tra

14、de.,application: practical uses,While reading for the main idea of a paragraph, we should ,Sum up(总结) the reading skills.,To find the topic sentence of a papagraph, we can look for some _ to help. A topic sentence is usually at the _of the paragraph . Its better for us to _ the meaning of some new w

15、ords according to the _.,Sum up(总结) the reading skills.,details or key words,beginning,guess,context,Better computer, better life?,Discussion: Better computer, better life?,I agree/ dont agree with the saying. In my opinion I believe that because The advantage/ disadvantage is Give your reasons. What makes