英语Unit1《Livingwithtechnology》课件Welcometotheunit(牛津译林版选修7).pptVIP

Brainstorming: What electrical and electronic products do you have at home? TV set air-conditioner refrigerator washing machine flatiron dust catcher electric rice cooker electromagnetic oven kitchen ventilator (油烟机) cooking utensils （炊具） desktop laptop digital camera DVD microphone MP4 MP3 cellphone telephone tape recorder electronic calculator electric fan hair dryer Which do you think is the most important? Why? Is there anything that you don’t think is useful? Technological developments in the last few decades have been breathing. Look at the pictures below and describle what you see. The development of electric devices: black-and-white TV colour TV LCD screen What kind of TV do you have at home? Early TV had antennae on top. The screen was very small and could show only black-and-white pictures. The size of the TV was small compared with modern TV, and usually it looked like a wooden box. Early TV also did not have a remote control. The control panel was on one side of the screen. desktop laptop Palm development of computer development of dictionary dictionary electronic dictionary development of communication letter/telegram telephone beeper cellphone How did people keep in touch in the past? People sent letters in the past, but letters were slow, and they took from a few days to several months to arrive. Then people invented the telegraph, but the telegraph could send only short sentences. Later, people could communicate via telephone, but the disadvantage was that not everyone had a telephone. Now, people use e-mails to communicate. E-mails are quick, but people without computers and access to the Internet cannot send e-mails. Today, most people use mobile phones to keep in touch with others. The size of a mobile phone is small so people can carry one in a pocket and receive and make calls wherever they are and whenever it is. What recent developments have been made to mobile phones? Now, mobile phone