公开课课件unit3 computers.ppt
www.themegallery.com,computers,I am very old now. I was born in ancient 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?,Riddles (谜语),abacus,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. 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?,robot,Im a machine that works automatically. I can do a wide variety of tasks, especially suitable for doing jobs too boring, difficult,or dangerous for human beings. Do you know who I am?,I can do with a computer,If you have a computer,what would like to do most?,cosplay,search for ,see movies,listen to music,read books and magazines,draw pictures,look at photographs on the computer,send emails to friends,download music and films,buy things on line,play games on the computer,Chatting online,Playinggames,Watching movies,Searching for information,problems,Shopping,computers,Listening to music,Sending Emails,The development of computers,The passage on page 18 will you more,WHO AM I?,Reading,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(3minutes),Reading Comprehension I,Topic sentences,1,2,3,These changes only became possible as my memory improved.,Since the 1970s many new applications have been found for me.,Para 1:,Para 2:,Para 3:,Over time I have been changed quite a lot.,The computer began as a calculating machine,1936,The computer grew rapidly both in size and in brainpower.,1.Finish the timeline below.,Scanning (5-8minutes),1960s,Computers were used in offices and homes.,Computers connect people all over the world together.,The computer had grown as large as a room.,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 machine2. analytical machine3. universal machine4. laptop,While-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 6. medical operations 7. space rockets 8. providing a life of high quality,While-reading,abacus,huge computer,PC,calculator,laptop,PDA,Whats next?,What do they tell you about the development of computers?,robot,What are the advantages and disadvantages of the computers?,Discussion,The advantage/ disadvantage is I think /dont think thatI thinkbecause of Lets decideAs/ Since, I think I agree /dont agreebecauseFirst SecondI believe thatIve decided that,Read the passage again. Underline the sentences that you do not understand and try to solve the problems using context clues and the dictionary.,V. Homework,www.themegallery.com,Thank You!,
