人教版高中英语必修2 Unit 3 Computers using language课件(共57张PPT)

课件57张PPT。Unit 3using languageComputersImportant Vocabulary
calculate, calculator, PC, notebook, common, analytical, simple, simple-minded, technology, technological, revolution, universal, mathematical, artificial intelligence, anyway, totally, network, truly, race, birth, IT, advantage, disadvantage, type, disagree, choice, material, personally, create, coach, move, arise, brain, mop, wander
in common, in one’s opinion, go by, so…that, deal with, human race, in a way, make up, after all, with the help of, watch overListen to a conversation about
different kinds of information
technology or IT. Pay attention
to the advantages and disadvantages
of each one. Discuss the advantages
and disadvantages.Try to use the following
expressions in your discussion.The advantage/disadvantage is…
I don’t like this one because …
What is your reason?
In my opinion …
I believe that … I’ve decided …
I think this one is better because …
Let’s make our decision. LM: What are you doing Dave?
D: I’m reading about information technology.
LM: You mean things like computers? In my opinion they’re so boring to read about. They’re only good to use.
D: But they’re just one kind of IT.
LM: Really? So what else is part of IT?Listening text
Li Ming=LM Dave=DD: We’ve had IT for a long time. Books, radios and TVs are also kinds of IT.
LM: Oh. I never thought of that before.
Books are a wonderful way for us
to get information.D: Yeah, I believe that too. They are cheap and easy to take with you but sometimes the information is out of date.
LM: I agree. The world is changing so fast.
But in my opinion listening to sports on the radio is better than anything else. Sometimes I also listen to English programmes on the radio. But they speak so fast and sometimes it’s difficult to understand everything.D: Yes. I also listen to English on the radio but it’s easier to follow on TV because you can also see what is going on. Sometimes it is more interesting to watch sports on TV than just listen to them on the radio.LM: I disagree because you get such a lot of information on the technical aspects of
a game on the radio. You don’t get that on TV. But I still think that the computer is the best kind of IT. You can watch a film on it, write to friends, get information, and find out what is going on in the world.D: I know, but it is also the most expensive and it is too big to carry with you everywhere. Also the Internet has nobody to check whether than information you find there is correct. So you have to be careful.
LM: Well, I suppose all kinds of IT
have both disadvantages and
advantages.You can both
listen and watch.You can find
information.You can listen
to English.You can get
information.You cannot write
to friends.It is very expensive.You cannot
watch a film.Sometimes it is
out of date.Reading & SpeakingReading What does Andy look like?
Andy looks like a human. Think about the following questions.2. What can it do?
It is designed to play football games and can move and think like a human.3. What part does Andy play in the
football team?
He’s a striker.1. advantages n. 优点; 优势; 有利条件
There are several advantages in city life. take advantage of 利用
be to your advantage 对……有利
disadvantage n. 缺点, 劣势; 不利条件
Language points2. type
1) n. 类型
This is a new type of machine, with
lots of meters on it.2) v. 打字
Will you please type this letter for me?3. disagree (vi) 常与with连用(食物, 天气等) 不适合
Mutton disagrees with me.不同意; 意见不同
I disagree with you about this.不一致; 不符
His report disagrees with the fact.4. personally adv. 就自己而言; 就我个人来说
She didn’t like the plan, but personally
I see nothing wrong with it.person (n)
--personal (adj.)
--personally (adv.)5. in a/one way 在某种程度上, 从某种意义上说In a way, his English has improved.与in a way同义的词组有in one way 和in some ways。
容易与之混淆的词组是in the way意为“造成阻碍”，请比较：
In a way, I like this new textbook
very much．
I’m afraid your bike is in the way．So you made it after all!
After all, what does it matter? 6. after all 毕竟; 到底; 终究 She should have offered to pay — she’s a millionaire, after all．7. with the help of 在……的帮助下
With the help of the teacher, I have
made rapid progress in my English
study.
8. watch over 看守; 监视; 照看
They were watched over by three policemen.watch out (for) 当心; 注意under the close watch 在严密的监视下
watch for sb./sth. 观察等待
keep a watch on 监视Speaking In small groups, discuss how to design your own android. The following questions can help you.1. What would you like it to look like?
2. What are some of the things you
would like it to do?
3. Do you want it to be like a man
or a woman, or neither?
4. How much would it cost?I think that…
In my opinion…
I believe that…
What’ s your reason?
I had decided that…A: What kind of robot have you decided
to make?
B: I've decided that we should have a
homework android. It could do all our
work after class and leave us more time
to do football．Sample dialogue:B: In my opinion, it should have four
arms to carry the books, a large head
to remember all the lessons and a
printer to write out the answers．
What do you think?A: OK. But what do you think it
should look like?A: Well, that sounds sensible. Perhaps it
could also put all the exercises into
specially marked boxes for each
subject so we could find them quickly. What about putting that in its stomach area?
B: Do you want it to be a man or a
woman? You can choose．A: I've decided it should be a girl．
B: What's your reason?
A: Girls are so hard-working．
B: Sounds good to me! Let's draw it now!Speaking & WritingSharing
What is a computer? A programmable machine. The two
principal characteristics of a computer are:
It responds to a specific set of instructions in a well-defined manner.
It can execute a prerecorded list of instructions (a program). Modern computers are electronic and digital. The actual machinery -- wires, transistors, and circuits -- is called hardware; the instructions and data are called software. All general-purpose computers require the following hardware components: memory : Enables a computer to store, at least temporarily, data and programs. mass storage device : Allows a computer to permanently retain large amounts of data. Common mass storage devices include disk drives and tape drives. input device : Usually a keyboard and mouse, the input device is the conduit through which data and instructions enter a computer.
output device : A display screen, printer, or other device that lets you see what the computer has accomplished.central processing unit (CPU): The heart of the computer, this is the component that actually executes instructions.In addition to these components, many others make it possible for the basic components to work together efficiently. For example, every computer requires a bus that transmits data from one part of the computer to another. Computers can be generally classified by size and power as follows, though there is considerable overlap: personal computer : A small, single-user computer based on a microprocessor. In addition to the microprocessor, a personal computer has a keyboard for entering data, a monitor for displaying information, and a storage device for saving data. workstation : A powerful, single-user computer. A workstation is like a personal computer, but it has a more powerful microprocessor and a higher-quality monitor. minicomputer : A multi-user computer capable of supporting from 10 to hundreds of users simultaneously.mainframe : A powerful multi-user computer capable of supporting many hundreds or thousands of users simultaneously. supercomputer : An extremely fast computer that can perform hundreds of millions of instructions per second.什么是计算机？一个可编制程序的机器。计算机的二种主要特性是: 它响应一个具体的指令为一个明确定义的方式.
现代计算机是电子和数字化的。 现有机器 -- 电线，晶体管和电路 -- 被称为硬件； 指令和数据被称为软件。所有通用计算机要求以下硬件元件:物理内存：使计算机, 至少临时地, 存放数据和节目。一个可编制程序的机器。计算机的二种大容
量存储器设备: 允许计算机永久地保存很多数据。大容量存储器设备普遍包括驱动器和磁盘驱动器。输入设备: 通常是键盘鼠标, 输入设备是数据和指令进入计算机的途径。输出设备: 显示器、打印机, 或其他可以让您看到计算机完成了什么的设备。中央处理单元(CPU): 计算机的心脏部分，是实际上执行指令的部件。除了这些部件,使得许多其他的基本部件一起
实现高效率地工作成为可能。 例如,要求一个巴士传送一个计算机上的一部分数据到另外的巴士上去. 电脑根据体积和重量大致分类如下,虽然有有可能的交叉：
个人计算机（PC机）: 一个小的、单用户的电脑微处理器.除微处理器之外, 一台个人计算机有一个键盘用来输入数据, 一个显示器用来显示信息, 还有存贮设备用来保存数据。 工作站:一个强大的、单用户计算机.就是一
台个人计算机,但它有个更强大的微处理器和更优质的显示器。
·小型机:多用户电脑，可支持10到上百用户同步. ·主机:一个强大的多用户电脑，可支持多用户或成百上千的用户同步. ·大型机:一个非常快的计算机，能每秒响应亿万个指令.Discuss together and then decide which kind of computer you would like to buy for your
school. Discussion A: Look at this computer. It has been given a smaller monitor.
B: That’s good because we can then have more computers in the school. Does it have the Internet as well?Sample dialogue:A: You can have it fitted but it is not included in the price. Now look at this one. Both a small monitor and a flat screen have been included. It can be joined to the Internet straight away and it has been given a large hard disc capacity. That’s good of course.B: Do you think we should buy laptop computers for our school? They are more useful because they can be moved from room to room. The school would not need to provide a special room for computers. They are also smaller and can be stored away more easily. But they have proved to be much more expensive than a personal computer.A: Yes, that is why the principal told me we could not buy them. He would not be able to afford enough for the school so we had better look at the personal computers. This one is very fast and uses discs which can store more information. Also it is neither too large nor too expensive. Let’s see what it’s made of. Why it’s perfect! It’s made from recycled materials so our headmaster will be very pleased. He will have killed two birds with one stone! The school will have new computers and have saved the earth’s materials as well.
B: Let’s choose this one, OK?
A: I think it is a good decision.Write a report to your school
to give your view out.Writing We looked at many different computers. The one we have chosen is the PEP personal computer. One of the main reasons is that it is suitable for schools. We found that it has been built with a smaller monitor and a flat screen. We think these things will save space so that the school can find room for more computers. Example This computer also has been fitted with an improved disc. The students will be able to put more information on one disc. This computer is also good because it has been made from recycled materials. Both my partner and I suggest the school
should buy this computer.