高中英语必修2（人教版）UNIT 3 COMPUTERS--READING 课件 （共19张PPT） .ppt

1、Unit 3 ComputersReadingLook at the following pictures and say their English names.I.Warming upabacuscalculatorWarming uphuge computerPCWarming uplaptopPDAWarming uprobotWhats next?Discuss with your partner the following questions.What do these pictures have in common?What do they tell you about the

2、development of computers?What do you think will be the next development?Warming upWork in pairs.Try to put these inventions in an order according to the time when they appeared.Then read the passage quickly and check to see if you were right.()analytical machine ()laptop ()calculating machine()robot

3、 ()PC ()universal machineII.Pre-reading251643Read the passage quickly and check your prediction.Was it correct?What is the main idea of the passage?This passage is about _.III.While-readingthe development of computersIn pairs guess the meaning of the following new words from the reading passage.Then

4、 check your guesses using a dictionary.A Btechnological revolutionsimplify applicationpersonal solvereality explorehappiness goalWhile-reading根据构词法猜测词义The meaning of the words in group A can all be guessed from their formation.Each pair of words has the same root（词根）.technology technologicalsimplesi

5、mplifypersonpersonalrealrealityhappyhappinessWhile-reading根据上下文猜测词义The meaning of the words in group B can all be guessed from context.Example:revolution:From the previous sentence we know that after the work of the operator,“I could think logically and produce an answer quicker than any person”,whi

6、ch indicates a great improvement,so“revolution”here may mean“a complete change”.While-readingRead 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 machine2.analytical machine3.universal machine4

7、.laptopWhile-readingParagraph 2:These changes only became possible as my memory improved.1.tubes 2.transistors 3.chips work 5.World Wide WebWhile-readingParagraph 3:Since the 1970s many new applications have been found for munications 2.finance 3.trade 4.robots 5.mobile phones 6.medical operations 7

8、.space rockets 8.providing a life of high qualityWhile-readingSummary A topic sentence sets out the main idea of a paragraph.A topic sentence is usually the first or last sentence of a paragraph.While-readingRead the passage quickly and finish the timeline below.1642:_1822:The analytical machine was

9、 made by Charles Babbage._:_1940s:_:The first family of computers was connected to each other.1970s:_Now:_IV.Post-readingThe computer began as a calculating machine.The computer grew rapidly both in size and in brainpower.1936The computer had grown as large as a room.1960sComputers were used in offi

10、ces and homes.Computers connect people all over the world together.Post-readingWork in group of four and brainstorm a list of things that you,your school and your family use computers for.Discuss how computers have changed our lives.Think about what you would have to do if you could not use computer

11、s any more.Give a report to the class.You can use the new words in the reading passage and the following expressions to help you in your discussion.I think/dont think that Please give me your reasons.What makes you think so?I think because(of)As/Since,I think First Second I agree/dont agree becauseI believe that Post-readingRead the passage again.Underline the sentences that you do not understand and try to solve the problems using context clues and the dictionary.V.Homework