【精品资料】高中英语 Unit 3 Computers课件 新人教版必修2.pptVIP

robot1.rmvb Q1: How did the computer work as an Analytical Machine? * Period 2 Reading Earliest computer Nowadays computer Who am I ? Skimming: It is a computer. 1.who is the speaker ? 2.What’s the passage about? It’s about the history of computer. Read the passage again. Find the topic sentence of each paragraph and the supporting details. Paragraph 1: Over time I have been changed quite a lot. 1. calculating machine 2. analytical machine 3. universal machine 4. laptop Skimming: The computer followed instructions from cards with holes. Paragraph 2: These changes only became possible as my memory improved. 1. tubes 2. transistors 3. chips 4. network 5. World Wide Web Paragraph 3: Since the 1970s many new applications have been found for me. 1. communications 2. finance 3. trade 4. robots 5. mobile phones 6. medical operations 7. space rockets 8. providing a life of high quality 2. Which sentence can be replaced (代替）in the passage by the following? Later, I become so clever that I can remember everything you told me. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told. Summary A topic sentence sets out the main idea of a paragraph. A topic sentence is usually the first or last sentence of a paragraph. now 1970s The first family of computers was connected by a network. 1940s 1936 The Analytical Machine was made by Charles Babbage. 1642 Time The computer began as a calculating machine． 1822 Alan Turing wrote a book to describe how computers could be made to work and built a “universal machine”． Computers had new transistors and became Small and thin. 1960s Computers were brought into peoples homes． Computers connect people all over the world together. What is the order of the text? Q3: how did computer change in its size, intelligence, speed, function? And ho