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人教版高一英语必修二unit3 computers(reading)课件


Unit 3

reading

1.Look at these pictures. Discuss what they have in common. Predict what it is going to be about.

What’s next?

Discussion What do they have in common? 1.They can be used for calculating. 2.They can deal with maths problems. 3.They are our friends. 4.They are useful and helpful.

robot

artificial intelligence

robot

2.Look at these pictures and guess what they are.

a calculating machine

analytical machine

universal machine solve difficult mathematical problems

computer as large as a room

3.Look at these inventions. Can you put them in an order according to the time when they appeared? After reading the passage, check to see if you are right.

( 2)analytical machine ( 5 ) laptop (1) calculating machine ( 6 ) robot (4) PC (3) universal machine

Reading

WHO AM I?

While-reading(1):

1. Who is the speaker in this story? A computer. 2. What’s the main idea of this passage? A. The development of computers. B. The development and use of computers. C. A machine which is simple-minded. D. Computers may replace human beings. 3. The text is written in the order of . A. time B. space C. logic D. all the above

While -reading(2): timeline 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. (Universal machine) 1940s: Computer had grown as large as a room.

1960s:The first family of computers was connected by a network.
1970s: Computers were used in offices and homes.
Many new applications have been found for computers.

Now: Computers connect people all over the world
together.

While-reading(3):careful reading

Read the passage again carefully and finish Ex. 2 on P19 in the student book. Para.1 Over time I have been Topic changed quite a lot. sentence Supporting ? calculating machine details ? analytical machine ? universal machine ? PC ? laptop

While-reading(3):

1. Why could you “think” logically and produce an answer quicker than any person? Because I was programmed by an operator who used cards with holes.

Para.2 Topic sentence

Those changes only became possible as my memory improved

Supporting ? tubes details ? transistors ? chips ? network ? World Wide Web

While-reading(3):

2.I totally changed my shape, because

my memory was first stored in tubes, then on transistors and later on very small chips.

I totally changed my shape!

Para.3 Topic sentence

Since the 1970s many new applications have been found for me. Supporting ? communications details ? finance ? trade ? robots ? mobile phones ? medical operations ? space rockets provide a life of high quality ?

Careful-reading:

3. Many new applications have been found for me, such as in communication/ finance/ trade/ robots/ mobile phones/ medical operations/ space Rockets.

While-reading(3):

4. (translation) Over time my memory has developed so much that, like an elephant, I never forget anything I have been told. 随着时间的推移,我的记忆力发展 的如此之快,就像一头 大象,我从来不会忘记 告诉我的任何事情。

Post-reading: pair-work

Discussion:
How computers have changed our lives? Brainstorm a list of things that you, your school and your family use computer for.

Advantages ? listen to the music ? see films ? watch news ? communicate with friends ? buy things on line

Disadvantages ? play computer games too much ? chat(聊天) on the Internet too much ? little time to study


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