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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit 3 Computers,Unit 3 Computers单元课件（人教课标必修2 ）,Guessing game,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 use me when solving mathematical problems.,Do you know who I am?,calculator,I am very big. Scientists use me to solve some mathematical problems.,huge computer,Do you know who I am?,PC,Personal Computer,Im a small, relatively inexpensive,computer,designed for an individual,user,. Im based on the,microprocessor,technology. At home, people use me to surf the Internet and play games.,Do you know who I am?,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.,Do you know who I am?,laptop,PDA,Personal Digital Assistant,I am so small in size that I can fit in your hand. I usually have a small screen usually bigger than a digital phone, however smaller than the smallest laptop, Im a great way to store telephone numbers, access the internet, make calculations, and so on.,Do you know who I am?,PDA,abacus,calculator,huge,computer,PC,laptop,Whats,next?,Can you tell the development of computers?,robot,WHO AM I?,Reading,Skimming,to get,main idea,1. Who is the speaker in this story?,2. Whats the main idea of this passage?,A. The development of computers.,B. The development and use of computers.,C. A machine which is simple-minded.,D. Computers may replace human beings.,A computer.,Skimming,Reading Comprehension I,Scanning,to get,detail information,1. Who was the first person to make the,earliest computer?,A. Alan Turing. B. Charles Babbage.,C. Charles Turing. D. Alan Babbage.,2. When was the “universal machine” built?,A. In 1822. B. In 1642.,C. In 1936. D. In 1970.,Scanning,Reading Comprehension,3. When was the computer the biggest?,A. In 1642. B. In 1936.,C. In the 1940s. D. In the 1970s.,4. How old is the computer?,A. About 170 years old.,B. About 270 years old.,C. About 370 years old,D. About 470 years old.,Scanning,5. Which of the following is in the right,order of time?,The computer was connected with,other computers.,b. Alan Turing wrote a book about the,computer.,c. The computer has been sent to explore,the Moon and Mars.,d. The computer began to simplify,difficult sums.,A. a. b. c. d. B. b. c. a. d.,C. d. a. c. b. D. d. b. a. c.,Scanning,Careful reading,to solve,difficult points,timeline,1642:,1822:,1936:,1940s:,1960s:,1970s,:,Now,:,Scanning:,The computer began as a calculating machine.,the Analytical Machine was built by Charles Babbage.,The computer grew rapidly both in size and in brainpower.,Computer had grown as large as a room.,Computers were used in offices and homes.,Computers connect people all over the world together.,The first family of computers was connected to each other,Paragraph 1,Topic,sentence,Over time I have been changed quite a lot.,Supporting details,1 calculating machine,2 analytical machine,3 universal machine,4 PC,5 laptop,Paragraph 2,Topic,sentence,These changes only became possible as my memory improved.,Supporting details,1 tubes,2 transistors,3 chips,4 network,5 World Wide Web,Do you know in what ways computers,are used today?,search for ,see movies,listen to music,read books and magazines,send emails to friends,download music,and films,buy things on line,play games on,the computer,draw pictures,look at photographs,on the computer,Careful reading,to solve,difficult points,Paragraph 3,Topic,sentence,Since the 1970s many new applications have been found for me.,Supporting details,1 communications,2 finance 3 trade,4 robots 5 mobile phones,6 medical operations,7 space rockets,8 providing a life of high,quality,1. My real father was Charles Babbage, who wrote a book and built me in 1936.,2. I was brought into peoples homes in the 1970s.,3. Since my birth I have been built to take the place of the human race.,True or False,Test,4. I began as a calculating machine,in Japan in 1642.,5. In 1936, I grew rapidly both in size,and in brainpower.,6. As time went by, I was made bigger.,7. Since the 1970s many new,applications have been found for me.,Test,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,gone by, I have been made _ and _,but I became,_ and _.,calculating machine,analytical machine,machine,universal,smaller,smaller,cleverer,quicker,In the _ they gave me a family connected by a _. Now people call it the Internet. I have been used in _ and _ since the 1970s. So I became PC. Since my _ I have truly been built to serve the _ _.,network,1960s,human,race,offices,homes,birth,Homework,1.Read the text after class and look for more information about the development and use of the computer and its applications.,2.Retell the passage.,Thank you.,
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