公开课课件 人教版BOOK 2第三单元Who am I课件.ppt

1、2vUnit 3 Computers reading9Task1 Look at the pictures and the title of the reading passage.Predict what it is going to be about.Prediction10Task2 Look at these inventions.Put them in order according to the time when they appeared.After reading the passage,check to see if you were right.()analytical

2、machine()laptop()calculating machine()robot()PC()universal machine21456311While-readingStep 2 Just have a fast readingFind out topic sentences of each paragraph.1.Over time I have changed quite a lot.2.These changes only became possible as my memory improved.3.Since the 1970s many new applications h

3、ave been found for me.Step 3 More detailed reading!1936(1822)LatterAnd lattera calculating machine,in 1642an analytical machine,(in 1822),Charles Babbagea universal machine,in 1936,Alan Turinga huge computer,as large as a room,in 1940sa personal computer and a laptop,and used in offices and homes si

4、nce the 1970sa calculating machine,in 1642帕斯卡计算器是由布莱斯帕斯卡(Blaise Pascal)发明的，帕斯卡计算器可以把一长串数字相加，在他的计算器中有一些互相联锁的齿轮，一个转过十位的齿轮会使另一个齿轮转过一位，人们可以像拨电话号码盘那样，把数字拨进去，计算结果就会出现在另一个窗口中。an analytical machine,(in 1822)分析机是由英国数学家查尔斯巴贝奇设计的一种机械式通用计算机。它的设计逻辑却非常的先进，是大约100年后电子通用计算机的先驱。a“universal machine”,in 1936(not a real

5、 machine,but just a mathematical model)a huge computer,as large as a room,in the 1940s尺寸（英尺）3050电容(个)10000重量（吨）30开关(个)6000真空管(个)18800耗电（W）150000电阻(个)70000成本（1940年）$40万ENIACtechnical words vMemory:storage or storage capacity as of a computer,disk,etc.The World Wide Web These changes only became possi

6、ble as my memory improved.v tubesv transistorsv small chipsv networkv World Wide WebPara.3 Find some supporting details for the topic sentence.1 minute.Since the 1970s many new application have been found for me.Since the 1970s many new applications have been found for me.v communicationsv financev

7、tradev robotsv mobile phonesv medical operationsv space rockets v exploring the Moon and MarsName:computer Born:(time)_ (place)_My real father:_My size:1._(in the past)2._(modern)My history:1.1642 _machine 2.1822_machine 3.1936 _machine 4.1940s _ 5.1970s _ and _My memory:_ _ _ My applications:_;_;_;

8、_;_;_;_.1642France Alan Turinghugesmaller and smalleranalytical calculatinguniversallaptopPCtubestransistorschipscommunicationfinancerobotmobile phonespace rocketmedical operationtradehuge computer26Paragraph 2Paragraph 3These changes only became possible as my memory improved.Since the 1970s many n

9、ew applications have been found for me.Supporting detailslcalculating machinelanalytical machineluniversal machinelPCltubesltransistorslsmall chipslcommunicationslfinanceltradelrobotslmobile phones lMedical operationslspace rocketParagraph 1Topic sentenceOver time I have been changed quite a lot.1.p

10、ersonification（拟人）2.narrative perspective:first-person narrative（叙述角度：第一人称角度）3.chronological order(时间顺序)4.main ideas and supporting details （主旨（主旨+支撑细节）支撑细节）How do we use computers in daily life?communicationentertainmentinformationwork and jobcommerce/finance onlinecommunicationchattingsending E-ma

11、ilsexpressing ideas onlinemaking new friendsentertainmentplaying gameswatching movieslistening to musicinformationreading newssearching for useful information,such as price information,job information and so onasking questions and seeking for helpcommerce/finance onlineshopping onlinetransferring ac

12、countspaying all kinds of bills,such as water&electricity fees,cell phone fees and so onspeculating in stocks onlinework and jobusing computers to do jobsapplying for jobs onlinedoing research34SummaryI,the c_,was a calculating machine in 1642 in F_.In 1936,I became a“u_ machine”to s_ any mathematic

13、al problem.Since the 1970s I have been used first as a P_ and then as a l_in office and h_.omputerranceniversalolveCaptopomes35Many changes have happened to my s_,so my s_ totally changed.I have been widely used in many fields,I have also been put into robots to e_the Moon and Mars.izehapexplore36Sh

14、ould high school students Should high school students surf the internet(surf the internet(上网上网)?)?I think high school students should surf the internet because(first,secondly,thirdly)I think high school students should not surf the internet because(first,secondly,thirdly)37AdvantagesWe can communica

15、te with friendsListen to the musicSee films&watch newsPlay gamesDo shoppingSave a lot of time Do a lot of useful things38DisadvantagesSome people especially the teenagers abandon(沉迷于沉迷于)themselves to the computer games and chatting on the Internet.As a result,they have little time to study.Some peop

16、le use the computer wrongly.If you spend too much time on it,it will do harm to our health.39 ConclusionConclusionThere is no doubt that computer has two sides,too.If we make good use of it,it will make our lives more colorful and convenient.But dont lose yourself in playing computers.Just remember:Keep fit,study well and work hard.HomeworkThe movieWall EMore information about the development of computers.