英語(yǔ)優(yōu)質(zhì)公開(kāi)課課件unit3 computers

1、L/O/G/OI 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 (謎語(yǔ)謎語(yǔ)) )abacusI am very small. I can be used for calculating. In China, a lot of students use me when

2、 solving mathematical problems. Do you know who I am?calculatorI am very big. Scientists use me to solve some mathematical problems. huge computerDo you know who I am?PC Personal ComputerIm a small, relatively inexpensive computer designed for an individual user. At home, people use me to surf the I

3、nternet 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?laptopPDA Personal Digita

4、l 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 internet, make calculations, and so on. Do you know who I am?robotIm a mach

5、ine 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 computerIf you have a computer,what would like to do most?cosplaysearch for see movieslisten to musicread books

6、 and magazinesdraw pictureslook at photographs on the computersend emails to friendsdownload music and filmsbuy things on lineplay games on the computerChatting onlinePlayinggamesWatching moviesSearching for informationproblemsShoppingListening to musicSending EmailsThe development of computers The

7、passage on page 18 will you more WHO AM I?Reading1. 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(3minu

8、tes)Reading Comprehension ITopic sentences123These 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 machine1936The computer grew rapidly b

9、oth in size and in brainpower.1.Finish the timeline below.Scanning (5-8minutes)1960sComputers 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 suppo

10、rting details. Paragraph 1: Over time I have been changed quite a lot. 1. calculating machine2. analytical machine3. universal machine4. laptopWhile-reading Paragraph 2: These changes only became possible as my memory improved. 1. tubes 2. transistors 3. chips 4. network 5. World Wide WebWhile-readi

11、ngParagraph 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 qualityWhile-readingabacushuge computerPCcalculatorlaptopPDAWhats next?What do they tell you about the development of computers?robotWhat 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 thatI