高中英语必修二第三单元reading.ppt

1、Unit 3 Computers,Unit 3 Computers单元课件（人教课标必修2 ）,Guessing game,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 lonely 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

2、 China, a lot of students use me when solving mathematical problems. Do you know who I am?,calculator,I am very big. Scientists use me to solve some mathematical problems.,huge computer,Do you know who I am?,PC Personal Computer,Im a small, relatively inexpensive computer designed for an individual

3、user. Im based on the microprocessor technology. At home, people use me to surf the Internet 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 sm

4、all enough for you to take me with you. Do you know who I am?,laptop,PDA Personal Digital Assistant,I 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 number

5、s, access the internet, make calculations, and so on. Do you know who I am?,PDA,abacus,calculator,huge computer,PC,laptop,Whats next?,Can you tell the development of computers?,robot,WHO AM I?,Reading,Skimming to get main idea,1. Who is the speaker in this story?,2. Whats the main idea of this passa

6、ge? 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,Reading Comprehension I,Scanning to get detail information,1. Who was the first person to make the earliest computer? A. Alan

7、 Turing. B. Charles Babbage. C. Charles Turing. D. Alan Babbage. 2. When was the “universal machine” built? A. In 1822. B. In 1642. C. In 1936. D. In 1970.,Scanning,Reading Comprehension ,3. When was the computer the biggest? A. In 1642. B. In 1936. C. In the 1940s. D. In the 1970s. 4. How old is th

8、e computer? A. About 170 years old. B. About 270 years old. C. About 370 years old D. About 470 years old.,Scanning,5. Which of the following is in the right order of time? The computer was connected with other computers. b. Alan Turing wrote a book about the computer. c. The computer has been sent

9、to explore the Moon and Mars. d. The computer began to simplify difficult sums. A. a. b. c. d. B. b. c. a. d. C. d. a. c. b. D. d. b. a. c.,Scanning,Careful reading to solve difficult points,timeline,1642: 1822: 1936: 1940s: 1960s: 1970s: Now:,Scanning:,The computer began as a calculating machine.,t

10、he 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.,Computers connect people all over the world together.,The first family of computers was connected to each oth

11、er,Do you know in what ways computers are used today?,search for ,see movies,listen to music,read books and magazines,send emails to friends,download music and films,buy things on line,play games on the computer,draw pictures,look at photographs on the computer,Careful reading to solve difficult poi

12、nts,1. My real father was Charles Babbage, who wrote a book and built me in 1936. 2. I was brought into peoples homes in the 1970s. 3. Since my birth I have been built to take the place of the human race.,True or False,Test,4. I began as a calculating machine in Japan in 1642. 5. In 1936, I grew rap

13、idly both in size and in brainpower. 6. As time went by, I was made bigger. 7. Since the 1970s many new applications have been found for me.,Test,I began as a _ _ in 1642 in France. In 1822 I was built as an _ _. Then in 1936 Alan Turing wrote a book and built a _ _. As the years have gone by, I hav

14、e been made _ and _ but I became _ and _.,calculating machine,analytical machine,machine,universal,smaller,smaller,cleverer,quicker,In the _ they gave me a family connected by a _. Now people call it the Internet. I have been used in _ and _ since the 1970s. So I became PC. Since my _ I have truly been built to serve