Unit 1 Living with technology welcome to the unit

课件14张PPT。Unit 1 Living with TechnologyWelcome to the unitWhat electrical and electronic products do you use in your studies? What electrical and electronic products do you use in your life?----Microwave ovens, refrigerators,
TV sets, air conditioners,
washing machines, vacuum cleaners,
CD players, electric fans,
mobile phones, digital cameras….
Which do you think is the most useful? Picture 1: Compare the TV in the picture with the
TV in your home:1.An antenna on top
2.the small screen
3.only black and white pictures
4.no remote controlHow 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.Which do you prefer, an electronic book or a traditional paper book? Why? 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?--- 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.How have different electronic devices changed
over time?
How have these inventions improved people’s
lives?Discussion:These inventions have greatly improved
people’s lives. Mobile phones are a good
example of this. Before mobile phones came into
use, people couldn’t make phone calls or receive
phone calls if there was no telephone nearby.
With mobile phones, people are able to make
calls at any time and at any place. Today, many
of us are very busy and cannot be expected to
wait for a long time. Mobile phones provide us
with a chance to keep in touch with others
wherever we are. 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 environment