课件27张PPT。Unit 3
Computers
Reading高一人教新课标版必修二2. What is W.W.W?World wide web.3. 科学技术Science and technology.4. 人工智能Artificial intelligence.5.笔记本电脑Notebook computer.1. What is IT?Information Technology.考 考 你穿孔卡
通用机器
内存
网络
万维网card with holes
universal machine
memory
network
World Wide WebNew words and expressionsCalculating machine 计算机器
Analytical Machine 分析机
Artificial intelligence 人工智能
Technological revolution 技术革命
Mathematical problem 数学问题
Transistor 晶体管palmtop smaller desktop convenient laptop What are today's smaller computers like?Reading comprehension 1. At that time it was considered
a technological revolution …
2. From then on, I grew rapidly both in size and in brainpower. By the 1949s I had grown as large as a room, and I wondered if I would grow any larger. However, this reality also worried my designers. As time went by, I was make smaller.
3. It took nearly two hundred years before I was built as an analytical machine by Charles Babbage.
4. After I was programmed by an operator who used cards with holes, I could “think” logically and produce an answer quicker than any person. At that time it was considered a technological revolution and the start of my “artificial intelligence”.
5. Anyhow, my goal is to provide humans with a life of high quality. A huge computerA PCThe history of the computerPalmtop Listen to the record and pay attention to the block words of the text. Careful ---learning
Attention:
1. passive voice
2. clause
3. beautiful words and sentencesCalculating
machineAnalytical
machineUniversal
machineArtificial intelligencenetworkInternetHow did computers develop?(In 1642)(In 1822)(in 1936)(In the 1960s)(In the 1970s)The computer began as a calculating machine.The computer grew rapidly
both in size and in brainpower.Read and finish the timeline below. Careful- readingThe computers had grown as
large as a room.1960sComputers were used in
offices and homes.Computers connect people all over the world together.Read and Complete the chart.Over time I have been changed quite a lot.calculating machine
analytical machine
universal machine
PC
laptopThese changes only became possible as my memory
improvedtubes
transistors
chips
network
World Wide WebSince the 1970s many new applications have been found for me.communications; finance;
trade; robots; mobile phones
medical operations
space rockets
providing a life of high qualitycalculatinganalytical universal mathematical
problemsMedical operations MemoryTransistorsApplicationsCommunicationTradeSummaryI, the c_________, was a calculating machine
in 1642 in F_______. In 1936, I became a
“u________ machine” to s_____ any
mathematical problem. Since the 1970s I have
been used first as a P___ and then as a l______
in office and h______.omputerranceniversalolveCaptopomesMany changes have happened to my s____,
so my s______ totally changed.
I have been widely used in many fields,
I have also been put into robots to e_______
the Moon and Mars.
izehapexploreDiscussionShould high school students surf the internet(上网)?Advantages
I think high school students should
surf the internet because…(first,
secondly, thirdly)
Disadvantages
I think high school students should
not surf the internet because…(first,
secondly, thirdly…)Advantages
We can communicate with friends
Listen to the music
See films & watch news
Play games
Do shopping
Save a lot of time
Do a lot of useful thingsDisadvantages
Some people especially the teenagers abandon
(沉迷于) themselves to the computer games
and chatting on the Internet. As a result, they
have little time to study .
Some people use the computer wrongly.
If you spend too much time on it, it will do
harm to our health. Conclusion
There is no doubt that computer has
two sides, too. If we make good use
of it, it will make our lives more colorful
and convenient. But don’t lose yourself
in playing computers. Just remember:
Keep fit, study well and work hard.The advantage/ disadvantage is …
I think /don’t think that…
Give me your reasons
What makes you think so?
I think…because of … Let’s decide…
As/ Since…, I think …
I agree /don’t agree…because…
First… Second… I believe that…
I’ve decided that… Let’s make a decisionHomework : Composition “Should high school
students surf the internet(上网)?”Homework1. Composition “Should high school students surf the internet(上网)?”
2. Do the Ex. On workbook
P18 P19-20 P50