Unit 1 Living with Technology welcome[下学期]

课件27张PPT。Unit 1 Living with TechnologyWelcome to the unitBe familiar with the new words in this unit soon.
According to these pictures in the welcome, talk about the development of electronic devices, realzing the effect of technology.
Topic :the advantages and disvantages of these electronic devices.
Pay attention to electric, electrical and electronic, technology and technique.What electrical and electric products do
you have at home?----Microwave ovens, refrigerators,
TV sets, air conditioners,washing
machines, vacuum cleaners,CD players,
electric fans,mobile phones, digital cameras….
Picture 1: Compare the TV in the picture with the
TV in your home:1.antennae on top / 2.the small screen /
3.only black and white pictures/
4.no remote control(the control panel
was on one side of the screen)How did people record music in the past?
---put the tapes into the recorder, then play the
tape with music at one side and play the record
button at the other side to record the music
onto the blank tape.
How do people record music using a computer?Copy the music from a CD to the computer
using recording software.The music will then be
digitalized and stored in and played by an MP3
player.How do you look up a word in a paper dictionary?The words in a paper dictionary are arranged in
alphabetical order from ‘A’ to ‘Z’. We need to look
at the first letter of the word and use it to search in
the dictionary. If two words start with the same
letter, we look at the second letter to decide the
alphabetical order. If the first and the second letters
are the same, we look at the third letter and so on.How do you look up a word in a electronic dictionary?We key in the word we want to look up and
click the button’Enter’. Then the word entry
will appear on the screen.What else can be stored in your electronic dictionary ?There can be a calendar, a list of addresses and
phone number, memos or a clock. More recent
electronic dictionary have large memory space
and some can be used as electronic books with
hundreds of books stored inside.How did people keep in touch in the past?---by letter/telegraph/telephoneHow do people keep in touch now?---most by mobile phoneWhat recent developments have been made
to mobile phones?The First Cellphone (1973) Name: Motorola Dyna-TacSize: 9 x 5 x 1.75 inchesWeight: 2.5 poundsDisplay: NoneNumber of Circuit Boards: 30Talk time: 35 minutesRecharge Time: 10 hoursFeatures: Talk, listen, dial --- have more and more functions.
1)send text messages
2)be used as a digital camera to take still or
even moving pictures.People can send
the pictures to other mobile phones
or e-mail addresses.
3) Mobile phones can be connected to the
internet and people can look at web pages
with mobile phones.
4)More advanced mobile phones can receive
TV signals so that people can watch live TV. Discussion:
Do the electronic devices bring us advantages
or disadvantages?Advantages: meet people’s needs
improve people’s lives to some degreeDisadvantages:
1)radiation may be harmful to people’s health
2)when people buy new electrical or electronic
devices,they throw away the old ones, which
not only cause waste,but also be harmful to
the environmentelectric light, guitar, drill, chair, shock, company, blanketelectrical equipment, wiring, signal, engineer, shock, appliances, power, energyelectronic calculator, dictionary, music