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课件网) 高一必修 2 Unit 3 Computers Reading Heavy! Difficult! Hard! Tired! Easy! Fast! Free! 情景导入 Riddles I am a magical machine. I can do many things for people , such as calculating , playing games , watching pictures , sending e-mails and so on. Who am I? 学习目标 1. Learn about development of computer. 2. Get the main idea of the passage. 3. Understand the usage of computers and internet. 课前自主学习 1.Look up for the relevant information and get the main idea of the passage. 2. to search on the internet. monitor keyboard mouse speaker modem scanner printer USB flash disc hard disc What’s next? The development of computers? Read the text quickly. 1. Who am I ? A. An operator． B. Alan Turing． C. A computer． D. Human race． C 2. What’s the passage about? The text mainly tells us a short history of the development of the _____ and its _____ in different fields.? computer applications 新课讲解 Skimming Find out the topic sentence of each paragraph. Read the passage and finish the timeline. 1642 1822 The analytical machine was made by Charles Babbage. The computer began as a calculating machine. 1940s The first family of computers was connected to each other. The computer grew rapidly both in size and in brainpower. Computers had grown as large as a room. 1960s 1936 1970s now Computers were used in offices and homes. Computers connect people all over the world together. Read the passage and finish the timeline. Read the passage again and complete the chart below. Develop- ment Early days Name Function Poor Strong A _____ machine Simplify difficult sums An _____ machine Think logically and produce an answer quickly A _____ machine Solve difficult _____ _____ calculating analytical universal mathematical problems Development Network times _____ stored in Tubes Large Small _____ Small chips _____ _____ Narrow Wide Finance _____ Robots Mobile phones _____ Space rockets Medical operations Memory Transistors Applications Communication Trade Topic sentence Supporting details Paragraph 1 Over time I have been changed quite a lot. Calculating machine Analytical machine Universal machine PC laptop Read the passage and find the topic sentence and details. Topic sentence Supporting details Paragraph 2 These changes only became possible as my memory improved. tubes transistors chips network World Wide Web Topic sentence Supporting details Paragraph 3 Since the 1970s many new applications have been found for me. ＊ communications ＊finance ＊ trade ＊robots ＊ mobile phones ＊ medical operations ＊ space rockets ＊ providing a life of high quality 新课讲解 Detailed reading 新课讲解 Detailed reading 新课讲解 Detailed reading 新课讲解 Detailed reading 新课讲解 Detailed reading Read paragraph 2 and find out the changes. 新课讲解 Detailed reading Read paragraph3 and find out the details. Paragraph 1 Topic sentence Over time I have been changed quite a lot. details Calculating machine , analytical ma ... ...
