陕西省蓝田县焦岱中高中英语人教版必修二：UNIT 3 COMPUTERS 课件4 .ppt

1、SEFC Book2 Unit3 ComputersDescribe&GuessOne student stands on the platform with his/her back to the screen.The other one describes the thing on the screen.After his/her description,the student standing on the platform gives his/her own answer.(Only English is allowed.)0Warming up:notebook computer(l

2、aptop)Internetmobile phone(cellphone)TV setdigital camerarobot(android)What is it in the picture?An abacus is an old calculating machine used in China until now.an abacusa calculatorA calculator is a new calculating machine which can solve a large number of mathematical problems.A huge computer is b

3、uilt to solve some mathematical problems.But it is too big.a huge computera PC(personal computer)A PC is a personal computer which can solve all kinds of problems and is widely used now.A notebook computerA notebook computer is a kind of useful computer which can be taken conveniently like a noteboo

4、k.PADPAD(Portable android device)is a kind of small portable PC.Robot (android)is a kind of helpful machine to do many jobs in place of people.robotThink it overlWhat do you know about the development of computers?What do they have in common?l I think thatl In my opinionl I believe thatl What s your

5、 reason?l Why do you think so?1.They can be used for calculating.2.They can deal with math problems.3.They are our friends.4.They are useful,smart,helpful,convenient,lovely.Pre-reading:What can you use computers and the internet to do?Computer and Internet send e-mailsdraw picturesplay gamescommunic

6、ate with my friendsgather information for my lessonslisten to musicwatch moviesbuy things I like1.Predict:What the text is about?2.Try to put the inventions in the order according to the time when they appeared.In the order from the earliest to now.l1.calculating machinel2.analytical machinel3.unive

7、rsal machinel4.PCl5.laptopl6.robotSkimming:Who am I?(A computer)Supporting ideas:1.Then in 1822 I was built.2.My real father was Alan Turing.3.However,people thought I was simple-minded until.SkimmingSkimmingThe text tells us the development/historyof the computer.Work out the main idea of the the p

8、assage.Find the topic sentence of each paragraph:nParagraph1:nParagraph2:nParagragh3:The topic sentence usually appears at the beginning or the end of a paragraph.Find the topic sentence of each paragraph:nn Paragraph1:nn Paragraph2:nn Paragragh3:Over time I have been changed quite a lot.These chang

9、es only became possible as my memory improved.Since the 1970s many applications have been found for me.Scanning:Answer the following questions.nn.Who was the first person to devise(想出)the earliest computer?nn 2.What did he make and what did it do?nn 3.Who was the next important person to design comp

10、uters?Timeline1642:_:The Analytical Machine was made by Charles Babbage.1936:_1960s:_:The first family of computers was connected to each other.1970s:_Now:_The computer began as a calculating machine.The computer began as a calculating machine.1822Alan Turing wrote a book to describe how computer Al

11、an Turing wrote a book to describe how computer could be made.could be made.Computers had new transistors and become smaller.Computers had new transistors and become smaller.1960sComputers were brought into peoples homes.Computers were brought into peoples homes.Computers connect people all over the

12、 world together.Computers connect people all over the world together.Ex1:Scanning:Ex2 on p19:Supporting details:l Para1:l Para2:l Para3:How do computers change our life?TIPSTIPSSome words on the Internet:netizen 网民Net surf 网络漫游computer virus computer virus 计算机病毒计算机病毒 cyber 计算机的，网络的browse 浏览cyberspace 网络空间scroll 滚动显屏access charge 接入费cursor 光标BBS 公告板服务hacker 黑客chat room 聊天室click 点击floppy discchipsmonitormodemCD-ROMscannerkeyboardprinterHomework:lRead the passage and underline the sentences you dont understand.lRetell the development of the computer.