第三单元电脑课件

1、Unit 3 Computers,Period 2 Reading,robot1.rmvb,Earliest computer,Nowadays computer,How does it change?,Who am I ?,Skimming:,1.who is the speaker ?,2.Whats the passage about?,Its about the history of computer.,Read the passage again. Find the topic sentence of each paragraph and the supporting details

2、. Paragraph 1: Over time I have been changed quite a lot. 1. calculating machine 2. analytical machine 3. universal machine 4. laptop,Skimming:,Q1: How did the computer work as an Analytical Machine?,The computer followed instructions from cards with holes.,Paragraph 2: These changes only became pos

3、sible as my memory improved. 1. tubes 2. transistors 3. chips 4. network 5. World Wide Web,Paragraph 3: Since the 1970s many new applications have been found for me. 1. communications 2. finance 3. trade 4. robots 5. mobile phones 6. medical operations 7. space rockets 8. providing a life of high qu

4、ality,2. Which sentence can be replaced (代替）in the passage by the following? Later, I become so clever that I can remember everything you told me. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told.,Summary A topic sentence sets out the main id

5、ea of a paragraph. A topic sentence is usually the first or last sentence of a paragraph.,Time,The computer began as a calculating machine,1822,Alan Turing wrote a book to describe how computers could be made to work and built a “universal machine”,Computers had new transistors and became Small and

6、thin.,1960s,Computers were brought into peoples homes,Computers connect people all over the world together.,What is the order of the text?,Q3: how did computer change in its size, intelligence, speed, function? And how about peoples opinion? Size: Intelligence: Speed: Function: Peoples opinion:,smal

7、ler,quicker,cleverer,dealing with , communicating with,clever & useful,calculating,simple-minded,True or False,Alan Turing built an Analytical Machine to solve any mathematical problems. People began to realize that the computer got cleverer and quicker with time passing. The computer began to serve

8、 the human race since it was brought into peoples homes. Since the 1970s, the computer was used by people around the world through the Internet. 5. The larger the computer is, the more memory it has.,F,T,F,T,F,a universal machine,its birth,I became small and thin but I got cleverer and cleverer, qui

9、cker and quicker. And my memory became so large that I couldnt believe it!,correct the wrong sentences,Fill in the blanks: I began as a _ _ in 1642 in France. In 1822 I was built as an _ _. Then in 1936 Alan Turing wrote a book and built a _ _. As the years have_ _, I have been made _ _ _ but I got

10、_ _ _, _ _ _. In the 1960s they gave me a family_ _ _ _. Now people call it the Internet. I was _ _ _ _ in the 1970s.So I became PC. Since my birth I have truly been built to serve the human race.,calculating machine,Analytical Machine,universal machine,gone by,smaller and smaller,cleverer and cleve

11、rer,quicker and quicker,connected by a network,brought into peoples homes,debate,Have bad effect on study,A waste of money,A waste of time,Learn,Communicate,Entertainment,Improve,advantages we can communicate with friends listen to the music see films & watch news play games do shopping save a lot o

12、f time do a lot of useful things,Disadvantages Some people especially the teenagers abandon (沉迷于) themselves to the computer games and chatting on the Internet. As a result, they have little time to study . Some people use the computer wrongly,There is no doubt that computer has two sides ,too. If w

13、e make good use of it, it will make our lives more colorful and convenient. But dont lose yourself in playing computers. Just remember: Keep fit, study well and work hard.,Alan Turing,calculating machine,PC (desktop /notebook),analytical machine,universal machine,artificial intelligence,Internet,completing the chart below.,Charles Babbage,The “father” (inventor),The history of computer,Suppose you are a reporter