课件22张PPT。人教课标 高一 必修 2贵州省思南中学 许义怀编辑monitorkeyboardmousespeakermodemscannerhard disc
printer
USB flash disc1236monitorscreenCD-ROMmouse
45
keyboardhard diskLook at these pictures. In pairs discuss what they have in common.
What do they tell you about the development of computers?
What do you think will be the next development?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?
abacusRiddles (谜语)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.
Do you know who I am?
laptopI am so small in size that I can fit in your hand. I usually have a small screen usually bigger than a digital phone, however, smaller than the smallest laptop, I’m a great way to store telephone numbers, access the internet, make calculations, and so on.
Do you know who I am?
PDA
Personal Digital AssistantI am very small. I can be used for calculating. In China, a lot of students use me when solving mathematical problems. Do you know who I am?calculatorI am very big. Scientists use me to solve some mathematical problems.Do you know who I am?
huge computerI’m a machine that works automatically.I can do a wide variety of tasks, especially suitable for doing jobs too boring, difficult, or dangerous for human beings.
Do you know who I am?
robotI’m a small, relatively inexpensive computer designed for an individual user. I’m based on the microprocessor technology. At home, people use me to surf the Internet and play games.Do you know who I am?
PC
Personal ComputerPDAabacuscalculatorhuge computerPClaptopCan you tell the development of computers?What’s next?
robotIn pairs discuss what 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.Pre-reading
look at the pictures and the title of reading passage. Predict what is going to be about.
Do you know in what ways computers
are used today? Work out a list and compare it with your partner.search for …see movieslisten to musicread books and magazinessend emails to friendsdownload music and filmsbuy things on lineplay games on the computerdraw pictureslook at photographs on the computeruse a computer for school worktake part in chat groupsWork 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.
( 2) analytical machine
(5) laptop
(1) calculating machine
(6) robot
(4) PC
(3) universal machine