必修2 Unit 3 reading.ppt

1、Unit 3,Computers,An abacus,A huge computer (huge=very big),A calculator,a laptop,a PC,a PDA,a robot,abacus,huge computer,PC,calculator,laptop,PDA,Whats next?,2. History of computers,robot,I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lone

2、ly because they dont like me now. Do you know who I am?,abacus,Riddles(谜语):,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,Riddles(谜语):,I am very large. I need a huge room to live in. I can be us

3、ed for calculating rapidly. But only scientists use me when solving mathematical problems. Do you know who I am?,huge computer,Riddles(谜语):,I am born in modern times. I can be used for solving all kinds of problems, including calculating problems. I am widely used in offices and homes. Do you know w

4、ho I am?,PC (Personal Computer),Riddles(谜语):,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.,laptop,Do you know who I am?,Riddles(谜语):,Do y

5、ou know who I am?,Riddles(谜语):,robot,Learn new words and expressions,Unit 3 Computers P17,Pre-reading 1 Look at the pictures and the title(题目) of the reading passage. Predict（预测） what it is going to be about. The title(题目) : Who Am I ? Picture 1: an analytical machine 一台分析机 Picture 2: Some people ar

6、e working using computers. Maybe the passage is about the history and development(发展) of computers and its using.,Unit 3 Computers P17,Pre-reading 2 Do you know in what ways computers are used today? Work out a list （列一张清单）and compare （比较）it with your partner.,Usage of computers and the internet,pla

7、y computer games Chat（聊天） on line send emails to friends download (下载) music and films search for（搜寻） information watch movies listen to music look at photos do shopping draw pictures ,How do you use computers and the Internet?,I often use a computer to I sometimes use it to And I never use it to,1.

8、 do my homework,2. play computer games,6. chat (聊天) on line,7. search for information,8. do shopping,Unit 3 Computers P17,Pre-reading 3 Look at these inventions(发明). Can you put them in an order（按顺序）according to (按照）the time when they appeared（出现）? After reading the passage, check（检查） to see if you

9、were right. ( ) analytical machine分析机 ( ) laptop手提电脑 ( ) calculating machine计算器 ( ) robot ( ) PC ( ) universal machine通用机器,1,2,3,4,5,6,Skimming to get the main idea(大意),Who am “I”? I am a computer. 2. Whats the main idea of the text? The computer wants to find “who he is”. B. The functional change o

10、f the computer. C. The computer becomes popular around the world. D. The history and development of the computer.,D. The history and development of the computer.,3. Which type / style does the text belong to ? 4 . What kind of literary devices (修辞)does the text use? Why does the writer use the title

11、 WHO AM I ?,A. Description(描写) B. Narration(叙述) C. Exposition(说明) D. Argumentation(议论),Personification 拟人,the first person,simple, vivid(生动的), interesting, understandable.,Comprehending理解 ( P19 ) 1 Read the passage and finish the timeline( 时间表) below（下面的）. 1642: _ _ : The Analytical Machine was made

12、 by Charles Babbage. 1936: _ 1940s:_ _:The first family of computers was connected to each other. 1970s: _ Now: _,calculating,size,brainpower,large,room,offices,homes,communication,Comprehending理解( P19) Read the passage and finish the timeline( 时间表) below（下面的）.,finance,trade,high,quality,Read Paragr

13、aph 1 and decide True() or False(),1.I began as a calculating machine in France in 1642 and I couldnt simplify difficult sums. ( ) 2. About two hundred years later, I was built as an analytical machine by Alan Turing. ( ) 3. Later an operator used cards with holes to make me think logically and prod

14、uce answers quicker than any person. ( ) 4. When I could think logically, it was considered as the start of my “artificial intelligence” as well as a technological revolution. ( ) 5. Alan Turing was my real father, who made it possible to make me become a “universal machine” to solve any difficult m

15、athematical problem. ( ) 6. A personal computer and a laptop are smaller in size and they have been used in offices and homes since the 1940s. ( ),F,F,T,T,T,F,could,Charles Babbage,1970s,Read Paragraph 2 and choose the best answer.,1.I have been changed a lot in size and brainpower(脑容量) because_. A.

16、 I was made smaller. B. my memory improved. 2. As time went by, I was stored _. A. in tubes B. on transistors C. first in tubes and then on transistors and chips. 3. The older I have grown, the _ I grow in size and the _in memory. A. larger, smaller B. smaller, larger C. bigger, larger 4. I didnt be

17、come a member of a big family connected by a network until _ and share my knowledge through _. the early 1960s, the World Wide Web B. the early 1960s , personal computers C. the late 1960s, the World Wide Web,B,C,B,A,Read Paragraph 3 and fill in the blanks.,Since the 1970s many new _(apply) have _ (

18、find) for me. I have become very important in _(communicate), finance and trade. I have also been used in robots , medical _ (operate) and used to make mobile phones as well. I have even been _ into space _ and sent to _ the Moon and Mars. Anyhow, my goal is _ humans _ a life of high_. I am now fill

19、ed with _(happy) that I am a _(devote) friend and helper of the human race.,applications,been found,communication,operations,put,rockets,explore,to provide,with,quality,happiness,devoted,2 Read the passage again and complete the chart below.,Over time I have been changed quite a lot.,These changes o

20、nly became possible as my memory (内存）improved.,Since the 1970s many new applications have been found for me.,calculating machine,Topic sentence 主题句,Supporting details 支撑的细节,analytical machine,universal machine,PC,laptop,tubes,transistors,chips,network,W.W. W.,have been changed,have been found,commun

21、ications finance trade robots mobile phones medical operations space rocket providing a life of high quality,I began as a machine in 1642 in France. After two hundred years, I was built as an machine by Charles Babbage. In 1936 my real father, Alan Turing, wrote a book about how to make me work as a “ machine” to any difficult mathematical problem. As time went by, I was made sma