必修二unitcomputersreadingPPT學(xué)習(xí)教案

1、會(huì)計(jì)學(xué)1必修二必修二unitcomputersreadingabacusRiddles (Riddles (謎語(yǔ)謎語(yǔ)) )第1頁(yè)/共31頁(yè)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頁(yè)/共31頁(yè)P(yáng)DA 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頁(yè)/共31頁(yè)calculator第4頁(yè)/共31頁(yè)I am very big. Scientists use me to solve some mathematical problems. huge computerDo you know who I am?第5頁(yè)/共31頁(yè)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頁(yè)/共31頁(yè)P(yáng)C Personal ComputerIm a small, relatively inexpensive computer designed for an individual(個(gè)人的個(gè)人的) user. Im based on the microprocessor(微處理器微處理器) technology. At home, people use me to surf the Internet and play games. Do you know who I am?第7頁(yè)/共31頁(yè)P(yáng)DAab

5、acuscalculatorhuge computerPClaptopWhats next?Can you tell the development of computers?robotartificial intelligence第8頁(yè)/共31頁(yè)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頁(yè)/共31頁(yè) 2.Look at these pictures and gue

6、ss what they are.a calculating machine第10頁(yè)/共31頁(yè)analytical machineuniversal machinesolve difficult mathematical problems第11頁(yè)/共31頁(yè)computer as large as a room第12頁(yè)/共31頁(yè)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頁(yè)/共31頁(yè)ReadingWHO AM I?第14頁(yè)/共31頁(yè)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頁(yè)/共31頁(yè)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頁(yè)/共31頁(yè)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頁(yè)/共31頁(yè)第18頁(yè)/共31頁(yè)P(yáng)ara.2TopicsentenceSupporting detailsfirst stored in _ Those changes only became possible as my memory improvedtubestransistorschipsnetwo

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

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

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