(最新)必修二unit3_computers_(reading)精品课件

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 __________
Para.3 Topic ห้องสมุดไป่ตู้entence
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 ▪
Do you know who I am?
robot
I’m a small, relatively inexpensive computer designed for an individual(个人的) user. I’m based on the microprocessor(微处理器) technology. At home, people use me to surf the Internet and play games.
Para.2 Topic sentence
Those changes only became possible as my memory improved
Supporting ▪first stored in __ tubes details ▪ transistors ▪ chips ▪ network ▪ World Wide Web
Fast reading
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
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
1. Why could the analytical machine “think” logically and produce an answer quicker than any person? Because it was programmed by an operator who used cards with holes.
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. ( )analytical machine ( ) laptop ( ) calculating machine ( ) robot ( ) PC ( ) universal machine
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！
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
abacus
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.
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
Do you know who I am?
PC
Personal Computer
Can you tell the development of computers?
abacus calculator
What’s next? robot
artificial intelligence
huge computer
Careful-reading:
3. Many new applications have been found for me, such as in communication/ finance/ trade/ robots/ mobile phones/ medical operations/ space Rockets.
Reading
WHO AM I?
A computer. 1. Who is the speaker in this story? 2. Find out the topic sentence of each paragraph and 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
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.
PC
PDA
laptop
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.
Unit 3
reading
Riddles (谜语)
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?
(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。
Do you know who I am?
laptop
I am so small in size that I can fit in your hand. I usually have a small screen usually bigger than a digital phone, but smaller than the smallest laptop, I’m a great way to store telephone numbers, access the Internet, make calculations, and so on.