Unit 3 Computers Warming up and Reading精品公开课课件

Early days Name Function Poor A calculating _________ Simplify Develop machine difficult sums -ment An analytical ________ Think logically machine and produce an answer quickly A _________ universal Solve difficult mathematical machine ____________ Strong problems __________
Skimming
Competition (ASK and Answer)
Q1: How did the computer work as an Analytical Machine? The computer “think” logically and produce an answer quickly by using cards with holes.




I think that… In my opinion… I believe that… What’s your reason? Why do you think so?
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.
Q2: What makes the computer totally
change his size?First tubes
Then transistors At last chips.
Q3: In how many ways do we say the computer changed? What are they? • smaller •Size:
Warming up and reading
Warming up
What do you know about computers ?
camera
Βιβλιοθήκη Baidu
7
monitor
screen
3
host computer
4 6 1
keyboard
5
8
2
mouse
speaker
Wireless controller
Look at the following pictures and say their English names. calculator
• Intelligence:
• Speed: • Function:
cleverer quicker
calculating…dealing with …, communicating with…
• People’ opinion: clever & useful
Scanning
Read the text carefully and fill in the tables.
Network times
Memory Tubes _________ Develop stored in ____________ Transistors
- ment
Large
Small
Small chips __________ ______ Applications Communication Narrow Finance ________ Trade Robots Mobile phones ___________ Medical operations Wide Space rockets
Paragraph 3 Since the 1970s many new applications have been found for me.
Paragraph 1 •Calculating machine Supporting •Analytical details machine •Universal machine •PC •laptop
Complete the chart below.
Paragraph 1
Topic Over time I sentence have been changed quite a lot.
Paragraph 2 These changes only became possible as my memory improved
abacus
huge computer
PC (personal computer)
laptop
PDA (personal digital assistant)
robot
What do you think the future computer development will be?
What do they have in common?
Paragraph 2
Paragraph 3
•Communications •Finance •Tubes •Transistors •Trade •Robots •Chips •Mobile phones •Network •World wide •Medical operations web •Space rockets •Providing a life of high quality
1940s 1960s 1970s now
Computers had grown as large as a room. The first family of computers was connected to each other. Computers were used in offices and homes. Computers connect people all over the world together.
1642 1822 1936 The computer began as a calculating machine． The analytical machine was made by Charles Babbage. The computer grew rapidly both in size and in brainpower.