Unit 3 Computers
Period 1 Warming up
Heavy! Difficult! Hard! Tired!
1. Easy! 2. Fast! 3. Free!
host computer speaker keyboard mouse
What do they have in common?
A huge computer
a notebook computer a laptop
A PC (personal computer)
(What do they have in common?) 1.They can be used for ? I think that… calculating. ? In my opinion… ? I believe that… 2.They can deal with maths problems. ? What’s your 3.They are our friends. reason? 4.They are useful and ? Why do you helpful. think so?
Can you tell the development of computers?
huge calculator computer
work for us in Mars(火星)
work in wars (战斗)
What do you think will be the next development?
Do you know in what ways computers are used today? Work out a list and compare it with your partner.
search for …
listen to music
read books and magazines
send emails to friends
download music and films
buy things on line
play games on the computer
look at photographs
on the computer
use a computer
for school work
take part in
Who am I?
Skimming: Read and answer these questions:
1. Who am I?
2. Who was the first person to invent the earliest computer?
3. Who was the next important person to design computers?
1642: The computer began as a calculating machine.
1822: the Analytical Machine was built by Charles Babbage.
1936: The computer grew rapidly both in size and
in brainpower. 1940s: Computer had grown as large as a room.
1960s: the first family of computers was connected to each other 1970s: Computers were used in offices and homes. Now: Computers connect people all over the world
Reading Comprehension Complete the chart below. Para- Para- Paragraph 1 graph 2 graph 3
Topic sentence Supporting details
Paragraph 1 Topic sentence Over time I have been changed quite a lot.
Supporting 1 calculating machine details 2 analytical machine 3 universal machine 4 PC 5 laptop
Topic sentence These changes only became possible as my memory improved. Supporting 1 tubes details 2 transistors 3 chips 4 network 5 World Wide Web
Topic sentence Since the 1970s many new applications have been found for me. Supporting 1 communications 2 finance 3 trade details 4 robots 5 mobile phones 6 medical operations 7 space rockets 8 providing a life of high quality
The history of computers
The first generation (1945-1956)
the second generation (1956-1963)
the fourth generation (1971- )
the third generation (1964-1971)
The development of computers:
Calculating machine Analytical machine
Universal machine 万能机,通用机器 Artificial intelligence 人工智能
Develop Early days -ment Name Function Poor A calculating _________ Simplify machine difficult sums An analytical ________ Think logically machine and produce an answer quickly A _________ universal Solve difficult mathematical machine ____________ Strong problems __________
Develop Network times -ment Memory Tubes _________ Large stored in ____________ Transistors Small Small chips Applications Communication Narrow ______ __________ Finance ________ Trade Robots Mobile phones Medical operations ___________ Space rockets Wide
Underline the phrases &sentences that you think are important
Star sentences: followed P1 L2 I _______instructions from cards with holes. 我执行穿孔卡的指令 P1 5 Earlier I was not very big, but then I huge became ______ .
P1 L6 However, people thought I was simple-minded discovered I had ___________ until they _________ “artificial intelligence.”
可是，人们认为我头脑简单， 直到发现我有人工智能时， 他们才不那么想了。
P1 L8 As the years have ________, gone by I have been made smaller and smaller.
times when my size was P2 L1 There were ______ totally ________changed.
standing P2 L3 But I was always so lonely _______ there by myself, until in the early 1960s,they gave me a family connected ________ by a network.
但是我总是孤孤单单地站在那里，直到60年代初， 人们才 给了我一个用网络连接的家庭。
Discussion Advantages and disadvantages of the computers.
we can communicate with friends listen to the music see films & watch news play games do shopping save a lot of time do a lot of useful things
Some people especially the teenagers abandon (沉迷于) themselves to the computer games and chatting on the Internet. As a result, they have little time to study . Some people use the computer wrongly.
Review the text
Recite Para one
Finish Ex. 1/2 on Page 20.