英语公开课课件unit3-computers

1、L/O/G/O2021/3/2312021/3/232I 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 (Riddles (谜语谜语) )abacus2021/3/233I am very small. I can be used for calculating. In China,

2、 a lot of students use me when solving mathematical problems. Do you know who I am?calculator2021/3/234I am very big. Scientists use me to solve some mathematical problems. huge computerDo you know who I am?2021/3/235PC Personal ComputerIm a small, relatively inexpensive computer designed for an ind

3、ividual user. At home, people use me to surf the Internet and play games. Do you know who I am?2021/3/236I 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

4、 me with you. Do you know who I am?laptop2021/3/237PDA Personal Digital AssistantI 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 inter

5、net, make calculations, and so on. Do you know who I am?2021/3/238robotIm 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?2021/3/239I can do with a computerIf you have a

6、 computer,what would like to do most?2021/3/23102021/3/23112021/3/23122021/3/23132021/3/2314cosplay2021/3/2315search for see movies2021/3/2316listen to musicread books and magazines2021/3/2317draw pictureslook at photographs on the computer2021/3/2318send emails to friendsdownload music and films202

7、1/3/2319buy things on lineplay games on the computer2021/3/2320Chatting onlinePlayinggamesWatching moviesSearching for informationproblemsShoppingListening to musicSending Emails2021/3/2321The development of computers The passage on page 18 will you more 2021/3/2322WHO AM I?Reading2021/3/23231. Who

8、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 I2021/3/2324Topic sentences123

9、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.2021/3/232516421822The analytical machine was made by Charles Babbage.The computer began as a calculating machine1936Th

10、e computer grew rapidly both in size and in brainpower.1.Finish the timeline below.Scanning (5-8minutes)2021/3/23261940sThe first family of computers was connected to each other.1970s Now1960sComputers were used in offices and homes.Computers connect people all over the world together.The computer h

11、ad grown as large as a room.2021/3/2327 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. laptopWhile-reading2021/3/2328 Paragraph 2:

12、These changes only became possible as my memory improved. 1. tubes 2. transistors 3. chips 4. network 5. World Wide WebWhile-reading2021/3/2329Paragraph 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 operat

13、ions 7. space rockets 8. providing a life of high qualityWhile-reading2021/3/2330abacushuge computerPCcalculatorlaptopPDAWhats next?What do they tell you about the development of computers?robot2021/3/2331What are the advantages and disadvantages of the computers?DiscussionThe advantage/ disadvantage is I think /dont think thatI thinkbecause of Lets decideAs/ Since, I think I agree /dont agreebecauseFirst SecondI believe tha