人教版高一英语必修二Unit 3 Computers课件

Well, in general, WWW stand for “World Wide Web”. Most people confuse the Internet with the World Wide Web. However, there is a difference. The Internet is made up of thousands of computers that are connected worldwide. WWW or World Wide Web, is what your computer uses to check out the Internet. For example, your computer uses browsers, such as Internet Explorer or Netscape (网景浏览器) to let you see and hear all the cool pictures, information, music and sounds on the Internet.
1．confuse vt. 2．connect vt. 3．browser n. 4．surf vt. 5．modem n. 6．graphics n.
使混乱；使困惑 连接；联合；关联 (电脑)浏览器 在……上冲浪 调制解调器 绘画；图像
1．What difference is there between the Internet and WWW? ________________________________________________________________ 2．What do you need if you surf the World Wide Web? ________________________________________________________________ 【答案】 1.The Internet is made up of thousands of computers that are connected worldwide；WWW is what your computer uses to check out the Internet. 2．You need to have a computer with a modem and a browser.Besides，you need to have an Internet Service Provider.

F The information was stored in tubes, then 2on. TthraenoslidsteorrIs aamnd, tlhaetelrarognetrhIehcahvipesb. ecome. As I have grown older I have also grown
human race.
Discussion
In what ways computers can be used to do for human race in the future?
For example:
A: What will computers be developed in the future? B: I think computers will be developed to help us …
1642 The computer began as a calculating machine．
1822 The analytical machine was made by Charles Babbage. The computer grew rapidly both in size and in
Since the 1970s Laptop
15
and homes
Read para 2 and then tell the statement true or false. (1 min)
F 1. My shape didn’t change even though my memory improved.
What are the new applications of the computer?
Communication

carry things
drone
work in wars
do space research
Homework
1. Finish exercise 1 on page 20
2. Find out some sentences of the passage you don’t understand. We will discuss it in next class.
Communication finance mobile phones Trade medical operation space rockets robots
What roles do computers play in the life of human beings?
They provide humans with a life of high quality.
Read para 1 and fill in the chart. (2 mins)
Time Machine Applications
calculating A __________ machine 1822 An analytical About in _____ machine universal In 1936 A ________ machine In 1642 By the 1940s A larger machine
Since the 1970s many new applications Para III: have been found out for me.
Can you find out the main idea of this passage?
A. The development of computers. B. A machine which is simple-minded. C. The development and the applications of computers. D. Computers may replace human beings.

Heavy! Difficult! Hard! Tired!
Free! Easy! Fast! Quick!
DVD-ROM
monitor
screen modem
printer hard disc
keyboard
scanner
Match the words with their meanings.
(c) the part of the computer that looks like a television
(d) something you use to click on things (files, etc.).
(e) the part of the monitor that you look at.
A
B
3
C
D
2
1
Summary
Huge computer
Calculator
Abacus
Internet
PC Notebook computer
?
Robot
Write out all the words you know about computers.
Internet
updat
Talking freely.
Different attitudes towards computers.
parents school students
Listen to the tape. Find the three robots from the following pictures and number them.
(f) a separate disk that contains lots of information.