高中英语人教版必修二Unit 3 Computers Reading课件（共26张PPT）

(共26张PPT)
Unit 3
Reading
Computers
In what ways are computers used?
Warming-up
mobile phones
*
space rockets
medical operations
helper
devoted friend
It helps us live a life of high quality.
Do you know how computers developed?
*
calculator
abacus
*
analytical machine分析机
universal machine
通用机器
personal computer
个人电脑
laptop 手提电脑
Reading: Who am I ?
1)Who is the speaker?


2)What is the main idea of the text?
The text is about the _______________ and the ___________of computers.
skimming
history/development
applications
It is a computer.
in the 1970s
scanning
in 1642
in 1936
in the 1940s
in 1822
in the 1960s
now
began calculating machine
analytical machine; Charles Babbage
universal machine; Alan Turing
as large as a room
connected by a network
new applications
computers connect people all over the world
Time What happened







Careful-reading
Please find the topic sentence of each paragraph .
Topic sentence
Over time I have been changed quite a lot.
calculating machine
Supporting details(细节)
analytical machine
universal machine
4) PC
5) laptop
Para.1
Para. 2
These changes only became possible as my memory improved.
tubes
电子管
transistors
晶体管
small chips
芯片
Topic sentence
Supporting details(细节)
network
World Wide Web
Para 3.
Since the 1970s many new applications have been found for me.
1) communication 6) medical operations
2) finance 7) space rockets
3) trade
4) robots
5) mobile phones
Topic sentence
Supporting details(细节)
A. Charles Babbage
B. Bill Gates
C. Alan Turing
D. Thomas Edison
1. Who really invented the computer ?
Comprehension
2. When was the computer the biggest?
A. In 1642
B. In 1936
C. In the 1940s
D. In the 1970s
3. What can you infer 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.
Post-reading(1): Retelling
Over time I have been ______ quite a lot. I began as a __________machine in 1642. In 1882 I was built as an _________ machine and then in 1936 Alan Turing wrote a book about how I could be made to be a _________ machine. These changes only became possible as my _______ improved. In the 1960s they give me a family connected by a _______ .
changed
calculating
analytical
universal
memory
network
Post-reading(1): Retelling
In the 1970s many new _________ have been found for me. My goal is to provide humans with a life of _____ ______. Now I am a devoted friend and ______ of the human race.
applications
helper
high
quality
The text was written in _____ order and used_______ person(人称)in _______ and ________________tense(时态).The type of writing (文体) of this text was an ________.
Post-reading(2): Summary
time
first
exposition(说明文)
The Present Perfect
The Past
Homework
Read the text by listening to the tape and underline the difficult points you can not understand;
Try to complete exercise 1 and 2 on page 20;


Thank you!