课件28张PPT。WelcomeWarming up
Let’s guess some riddles(谜语)!Come on! I am very old now. I was born in China. Many people used me for calculating (计算)in the past, but now I am seldom be used.abacusRiddles(谜语):Do you know who I am ?A huge computerI am very small. I can be used for calculating. In China, a lot of students use me when solving mathematical (数学的)problems. calculatorRiddles(谜语):A toy?A handbag?ComputersRiddles(谜语): I’m a computer. But I’m small enough for you to take me with you.
notebook computerDo you know who I am?Riddles(谜语):ComputersUnit3A huge computerA PCthe development of the computerPalmtop Discussion Q :How do you use computers and the Internet?
play gamescommunicate with otherssurf Internetlisten to musicwatch moviesbuy the things I like, eg: books and CDsread newslearn EnglishdownloadA : How do you often use computers at home?
B :I often use a computer to…
what about you ?
A : I often use a computer to…related information from Internet. (下载)How much do you know
about a computer???Give the English name of the
computer components (组件)Keyboard (键盘)What is it in English??What is it in English??monitorscreenmouse
鼠标What is it in English??Main board(主板)What is it in English??CD-ROMscannerprinterspeaker Work in pairs. Try to put these inventions in an
order according to the time when they appeared. Then read the passage quickly and check to see if you were right.
( ) analytical machine
( ) laptop
( ) calculating machine
( ) robot
( ) PC
( ) universal machine
II. Pre-reading251643Reading comprehensionFast reading:
---Find out “Who am I”.
---Get the main idea. Who am I ?1*I am _____________.
2*The main idea of the Reading:It tells us the ______ and _______ of computers.
A. development B. character
C. history D. ability a computerAC Find the topic sentence of each paragraph and the supporting details.
Scanning Over time I have been change quite a lot.Analytical machineUniversal machinePClaptopScanning These changes only became possible
as my memory improved.
transistorschips networkWorld Wide WebScanning Since the 1970s many new applications(应用) have been found for me.traderobotsmobile phonesspace rocketsmedical operationsSo from the timeline, we know that the passage is organized in order of____ !timeRead the passage quickly and finish the timeline below.
1642: ___________________________________________
1822: The analytical machine was made by Charles Babbage.
____: ___________________________________________
1940s : __________________________________________
_____:The first family of computers was connected to each other.
1970s: __________________________________________
Now : __________________________________________
careful readingThe computer began as a calculating machine.
The computer grew rapidly both in size and in brainpower.
1936The computer had grown as large as a room.1960sComputers were used in offices and homes.Computers connect people all over the world together.
Self -check1. Where were you in 1642?In France. 2. What happened to you after nearly
two hundred years?I was built as an Analytical Machine by Babbage.3. What were you called in 1936?A universal machine.4. What happened to you in the 1970s?I have been used in offices and homes.5. When were the computers given a family called World Wide Web?In early 1960s6. What’s the goal of the computer?Provide humans with a life of high quality.DiscussionIs it very important to learn computer skills for us? Why or why not?
Use the following expression in your discussion.
I think that …… Because……
In my opinion …
I believe that …
1.Finish the Ex1 and Ex2 on page19
2.Finish the Ex2 and Ex3 on page20.Homework