课件19张PPT。Unit 3 Computers I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lonely because they don’t like me now.
Do you know who I am?An abacusguessing game A huge computerI am built to solve some mathematical problems. But I am too big.
Do you know who I am?
I am very small. I can be used for calculating. In China, a lot of students use me when solving mathematical problems.
Do you know who I am?A calculator A PC personal computerI am the common computer which can solve all kinds of problems and is used widely now.
Do you know who I am?
I can be used for calculating. Besides, I can also be used for watching DVD, sending e-mail and communicating through the Internet. However, I am not a PC, because I’m small enough for you to take me with you.
A notebook computerDo you know who I am?Who am I ?1. Choose the best answers
1) What’s the main idea of the text?
A. The computer wants to find “who he is”.
B. The fun_ction(功能) of the computer.
C. The computer becomes popular around
the world.
D. The history of the computer.
2) What can you infer(推断) from the text?
A. The computer has artificial intelligence.
B. The computer changes a lot over the years.
C. The computer was not connected by a network until in the early 1960s.
D. Now the computer can only be used to deal with information.
1. Choose the best answers
1) What’s the main idea of the text?
A. The computer wants to find “who he
is”.
B. The fun_ction(功能) of the computer.
C. The computer becomes popular
around the world.
D. The history of the computer.Fast reading:2) What can you infer(推断) from the text?
A. The computer has artificial intelligence.
B. The computer changes a lot over the
years.
C. The computer was not connected by a
network until in the early 1960s.
D. Now the computer can only be used to
deal with information.
2.Listen to the tape. True or FalseAlan Turing built an Analytical Machine to solve any mathematical problems.
People began to realize that the computer got cleverer and quicker with time passing.
The computer began to serve the human race since it was brought into people’s homes.
Since the 1970s, the computer was used by people around the world through the Internet.
5. The larger the computer is, the more memory
it has.
FTFTFCharles Babbageits birth
The memory of computers has no relationship with their size.Q1: How did the computer work as
an Analytical Machine?
Q2: In which way did computers talk to
humans?
Q3: What does “others” (P2L6) refer to?
3.Careful readingQ1: How did the computer work as
an Analytical Machine?
The computer followed instructions
from cards with holes.
Q2: In which way did computers talk to
humans?
Using BASIC.
Q3: What does “others” (P2L6) refer to?
Other computers. 3.Careful reading
I began as a _________machine in 1642
in France. ①In 1822 I was built as an
_________machine. ②Then in 1936 Alan Turing wrote a book and built a ________ machine. ③ People thought I was _______ minded until they discovered I had
“ ________intelligence”. ④ In the 1960s, after I got a new _________, people connected my family by a _______, which now is called the
_________and used by billions of people. ⑤Changes of the computerSummarycalculatinganalyticaluniversal
simple-artificialtransistornetworkinternetChanges of the computercalculating machineanalytical machineuniversal machinemachine with artificial intelligencemachine with new transistorsbrought into people’s home
used around the worldIn 1642In 1822In 1936In the 1960sNowadaysSummaryIn the 1970s4.Discussion
1.In what other ways do we say the computer changed? What are they?
smallerquickercleverercalculate →solve mathematical problems → deal with information→ communicate
with people
simple-minded----clever & usefulPeople’s opinion:
Function:
Speed:
Intelligence:Size:Guess! A toy?A handbag?Computers Suppose you were a computer designer. How do you design your computer? What would you like it to look like? What are some of the things you would like it to do? What’s your dreamy computer?Discussion Well, I’d like to design my computer in this way. Since I like dogs very much , I will make it the shape of a dog.
Every morning, I’d like it to wake me up and fetch me what I ask it to take. Then it will go to school with me and carry my bag for me. Maybe at least it will cost 2,000 yuan, but it’s worth it.Palmtop