必修二unitcomputersreadingPPT学习教案

1、会计学1必修二必修二unitcomputersreadingabacusRiddles (Riddles (谜语谜语) )第1页/共31页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?l

2、aptop第2页/共31页PDA 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, but smaller than the smallest laptop, Im a great way to store telephone numbers, access the Internet, make calculations, and so on.Do you k

3、now who I am?第3页/共31页calculator第4页/共31页I am very big. Scientists use me to solve some mathematical problems. huge computerDo you know who I am?第5页/共31页robotIm a machine that works automatically. I can do different kinds of tasks, especially suitable for doing jobs too boring, difficult, or dangerous

4、 for human beings. Do you know who I am?第6页/共31页PC Personal ComputerIm a small, relatively inexpensive computer designed for an individual(个人的个人的) user. Im based on the microprocessor(微处理器微处理器) technology. At home, people use me to surf the Internet and play games. Do you know who I am?第7页/共31页PDAab

5、acuscalculatorhuge computerPClaptopWhats next?Can you tell the development of computers?robotartificial intelligence第8页/共31页1.They can be used for calculating. 2.They can deal with maths problems.3.They are our friends.4.They are useful and helpful.Discussion第9页/共31页 2.Look at these pictures and gue

6、ss what they are.a calculating machine第10页/共31页analytical machineuniversal machinesolve difficult mathematical problems第11页/共31页computer as large as a room第12页/共31页3.Look at these inventions. Can you put them in an order according to the time when they appeared? After reading the passage, check to s

7、ee if you are right.( )analytical machine ( ) laptop( ) calculating machine ( ) robot( ) PC ( ) universal machine第13页/共31页ReadingWHO AM I?第14页/共31页1. Who is the speaker in this story? 2. Find out the topic sentence of each paragraph and the main idea of this passage. A. The development of computers.

8、 B. The development and use of computers. C. A machine which is simple-minded. D. Computers may replace human beings.3. The text is written in the order of . A. time B. space C. logic D. all the aboveA computer.Fast reading第15页/共31页Look at these inventions. Can you put them in an order according to

9、the time when they appeared? After reading the passage, check to see if you are right.( )analytical machine ( ) laptop( ) calculating machine ( ) robot( ) PC ( ) universal machine123456第16页/共31页While-reading(3):careful readingRead the passage again carefully and finish Ex. 2 on P19 in the student bo

10、ok.Para.1TopicsentenceSupporting details Over time I have been changed quite a lot.calculating machineanalytical machineuniversal machinePClaptop第17页/共31页第18页/共31页Para.2TopicsentenceSupporting detailsfirst stored in _ Those changes only became possible as my memory improvedtubestransistorschipsnetwo

11、rkWorld Wide Web第19页/共31页my memory was first stored intubes, then on transistors andlater on verysmall chips.I totally changed my shape！第20页/共31页第21页/共31页Para.3TopicsentenceSupporting details Since the 1970s many new applications have been found for municationsfinancetraderobotsmobile phonesmedical

12、operationsspace rocketsprovide a life of high quality第22页/共31页in communi-cation/ finance/ trade/ robots/ mobileRockets.Careful-reading:phones/ medical operations/ space 第23页/共31页Develop-mentEarly daysNameFunctionPoorStrongA _ machineSimplify difficult sumsAn _ machineThink logically and produce an a

13、nswer quicklyA _ machineSolve difficult _calculatinganalytical universal mathematical problems第24页/共31页Develop-mentNetwork times_ stored inTubesLargeSmall_Small chips _Narrow WideFinance_RobotsMobile phones_Space rocketsMedical operations MemoryTransistorsApplications CommunicationTrade第25页/共31页1642

14、: 1822: 1936: 1940s:1960s: 1970s: 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.The first family of computers wa

15、s connected by a network. Many new applications have been found for computers.Now:Computers connect people all over the world together.While -reading(2):(Universal machine)第26页/共31页True or False1. Alan Turing built an Analytical Machine to solve any mathematical problems.2. People began to realize t

16、hat the computer got cleverer and quicker with time passing.3. The computer began to serve the human race since it was brought into peoples homes.4. 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.FTFTF第27页/共31页Ho