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1、Lead-in:1._ plays an important role in exploring the unknown fields and realizing the dreams of our ancestors（祖先）.Science and technology2.High technology has a direct effect on our life.What electric goods and electronic appliances(电器)do you have at home?第1页/共25页 TV setremote control第2页/共25页 refrige
2、ratorwashing machine第3页/共25页 microwave ovenAir conditioner第4页/共25页 flatiron vacuum cleaner第5页/共25页electric rice cookerelectromagnetic oven第6页/共25页 desktop laptop第7页/共25页digital cameraDVDmicrophone第8页/共25页MP4MP3第9页/共25页cell phonetelephone第10页/共25页tape recorderelectronic calculator第11页/共25页electric fa
3、nhair dryer第12页/共25页Timeline 1982 electric fan1984 TV(black-and-white)1985 refrigerator1986 washing machine1990 TV(colour)1997 air-condition2001 mobile phone(with basic functions)2004 mobile phone(with MP3 and camera)What can you conclude from the timeline?development第13页/共25页The development of elec
4、tric devices:development of TVblack-and-white TVcolour TVLCD screen第14页/共25页 desktop laptopPalmdevelopment of computer第15页/共25页development of dictionarydictionaryelectronic dictionary第16页/共25页development of communicationletter/telegramtelephonebeepercell phone第17页/共25页developmentof cameramobile phon
5、ewith a cameradigital cameracamera第18页/共25页development of audio(音响)devicegramophone(留声机)radio/tape recorder第19页/共25页 MDwalkmanCD playerMP3MP4第20页/共25页development of fanfanair conditionerelectric fan第21页/共25页Discussion:1.What can our human beings benefit from the development of electric and electroni
6、c appliances?2.Can we depend on these appliances completely?第22页/共25页Summary With peoples hard work and intelligence,human beings own lots of useful and handyelectric and electronic devices.These devicesdo make us save a lot of time and energy.Besides,they free us from heavy housework.But we should not depend completely on them.We human beings should make reasonable useof them so that we can relax ourselves andfind pleasure and happiness in our life.第23页/共25页Homework 1.Read two passages on P106-107 2.Preview reading.3.Unit Revision:Period 1.第24页/共25页感谢您的观看！第25页/共25页
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