高中英语必修二 Unit3 Computers 精品课件（人教新课标）.pptVIP

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 don’t like me now. Do you know who I am? 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? * * Guess! A toy? A handbag? abacus Guess more: calculator 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 I’m small enough for you to take me with you. notebook computer Do you know who I am? A huge computer A PC Palmtop Who am I ? Skimming: Go over the story to find out who the speaker is. Write down 3 sentences to support your idea. It is a computer. ● I was able to share my knowledge with others through the World Wide Web. ●”My real father was Alan Turing ....” ● I was built as an Analytical Machine by Charles Babbage.” now 1970s The first family of computers was connected to each other. 1940s 1936 The Analytical Machine was made by Charles Babbage. 1642 Timeline The computer began as a calculating machine． 1822 Alan Turing wrote a book to describe how computers could be made to work． Computers had grown as large as a room. 1960s Computers were used in offices and homes． Computers connect people all over the world together. Scanning: In which order is the text organized? True or False Alan Turing built an Analytical Machine to solve any mathematical problems. People began to realize that the computer got cleverer and quicker with time passing. The computer began to serve the human race since it was brought into people’s homes. 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. F T F T F 1. Choose the best answers 1) What’s the main idea of the text? A. The computer wants to fi