人教 必修2 Unit3 Reading 14PPT.ppt

1.Who is the speaker? It is a computer. 2. What’s the main idea of this passage? This passage talks about the development of computer. Skimming Scanning 1642 ____________ calculating machine 1822 ____________ 1936 ____________ 1970s ____________ analytical machine universal machine PC and laptop simplify difficult sums think logically and produce an answer quicker than any person technological revolution artificial intelligence solve any difficult mathematical problem be used in offices and homes Read para.1 and find out the inventions according to the time. 3 2 1 Over time I have changed a lot. These changes only became possible As my memory improved. Since the 1970s many new applications have been found for me. Find out the topic sentence of the second and third paragraph Attentions: you should pay more attention to the beginning or the end of the paragraph to find out the topic sentences Further Reading : True or false (Para.2) 1.First my memory stored in tubes, then on very small chips and later on transistors. then on transistors and later on small chips 2. As time went by, I was made bigger. 3. In the 1960s the first family of computers was connected to each other. 4.Computers could share information and express their feelings. smaller but couldn’t Para 3: Which one is not right according to para3? The computer has been sent to explore the space. B. Computers play an important part in economic field. C. Computer can be used in the medical operation. D. Computers have a bad effect on the life of human race. paragraph1 paragraph2 paragraph3 Topic sentence Supporting details Over time computers have been changed quite a lot. calculatiing machine analytical machine universal machine PC laptop The memory of computers improved. tubes transistors chips network WWW New applications have been found. communication finance trade robots mobile phones medicals operations space rockets Summarize writing method：