人教版高一英语必修2所有精华版课件ppt.ppt

Unit 3 Computers Reading WHO AM I? 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? Discussion A. Read the passage carefully and find the topic sentences and the details supporting them. Now we are to read the text once again and underline all the expressions in the text. Put them down into your notebook after class as homework. Retelling Retell the text according to the time-table. Thank You !!!! B. Read aloud and underline expressions I, the _________, was a calculating machine in 1642 in __.In 1936, I became a “_________ machine” to _____any mathematical problem. Since the 1970s I have been used first as a ___ and then as a _______in office and ______. Many changed have happened to my ____, so my _______totally changed. I have been widely used in many fields, I have also been put into robots to _______the Moon and Mars. computer France universal solve PC laptop homes size shape explore C. Fill in the blanks * * abacus Riddles(谜语): calculator Riddles(谜语): 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? Riddles(谜语): What do they have in common? I think that … In my opinion… I believe that… Why do you think so? What’s your reason? I think they all can calculate something.It can deal with some maths problems. I believe that they are our good friends.In our everyday life. We can not finish our work quickly without them. In my opinion ,people improve abacus,make it more useful and make it a computer.They a