二零二三年 优质公开课Unit3ComputersReading教学.ppt

Unit 3 Computers Reading（Ⅱ） Topic sentencethinking? How to find it?What is topic sentence? Over time I have been changed quite a lot 1642 The computer began asa calculating machine. 1822The analytical machinewas made by CharlesBabbage. 1936 Alan Turing’s universal machine 1940sThe computer hadgrown as large as aroom 1960s Family of computerswas connected to eachother. 1970sPC laptop were used in offices and homes. NowComputersconnect peopleall over theworld together. transistorschipsnetworkWorld Wide WebThesechangesonly becamepossibleas my memory improvedtubes I have a memory like an elephant.= I have a good memory and will never forget things. APPSince the 1970smanynew applicationshave been foundfor me communicationtrade medical operations space rocketsmobile phonerobotsFinanceAPP Supporting details calculating machineanalytical machineuniversal machinePClaptopmemorytubestransistorschipsnetworkWWWcommunicationfinancetraderobotsspace rocketsmobile phonemedical operations Exercises time HomeworkReading material Find out the topic sentence for each paragraph. Write down the main idea of the text.