Unit 4 Topic 3 China is the third nation that sent a person into space. Section C课件(共22张PPT)

(共22张PPT)
Unit 4 Topic 3
China is the third nation that
sent a person into space.
Section C
1. Some words: doubt, tiny, inside, brain,cancel, connect
2. Some phrases: no doubt, for instance
3. Some sentences:
(1) There is no doubt that computers are very useful in technology and business
(2) Computers help us at work and at home, but they must be used properly.
学习目标
What are the computers used for
Computers were invented in the USA in the 1950s, now they have
become very important in many areas of work and leisure.
新课讲授
Doctors can find diseases easily with the help of computers.
For example, tiny computers which are inside patients' bodies can keep their hearts beating normally.
In space, computers have been used to control the speed and direction of a spaceship.
1a Read and understand.
1. Tick the fields we use the computer in.
education business
industry communication
daily life medical care
entertainment sports
1a Read and understand.
2. Can you give an example of the use of the computer in one of the fields above
The Importance of Computers
Since computers were invented in the USA in the 1950s, they have become very important in many areas of work and leisure.There is no doubt that computers are very useful in technology and business. In space, computers have been used to control the speed and direction of a spaceship.With the help of computers, doctors can find diseases easily and solve other problems.For example, tiny computers which are inside patients' bodies can keep their hearts beating normally. In factories, robots are controlled by computers that are like human brains. They can do work that is dangerous to humans. In business, computers are used to place and cancel orders. They are also making the workplace safer and better.
Since the Internet came into being, people's lives at home have changed, too. More and more people have personal computers that are used to play games and watch movies. Thanks to the Internet, people can do shopping and do business at home. Instead of writing letters on paper, people communicate by sending e-mails and chatting on line. The whole world is connected. The Internet is making the world smaller, like a village.
Computers have improved our lives, but they have brought problems, too. For instance, if we work on computers too long, we may get headaches or sore eyes. If we play computer games too much, we won't have enough time to study or exercise. Besides, not everything we read on the Internet is true or good for puters help us at work and at home, but they must be used properly.
doubt n. & v. 怀疑，疑惑
Language points
1.There is no doubt that computers are very useful in technology and business.毫无疑问电脑在技术和贸易业都非常有用。
There is no doubt that we will be successful.
I don't doubt that they will be able to solve the problems.
(2)doubt (vt.)+ 从句
(3)doubt (vi.)+ about / of
Doubt is the key to knowledge.
There is no reason to doubt of his honesty.
I doubt whether/if he'll change his mind.
(1)doubt (n.)
2.For example , tiny computers which are inside patients’ bodies can keep their hearts beating normally.
例如，病人体内植入微电脑能帮助病人的心脏正常搏动。
64英寸 超大型（Huge）
32英寸 大型（Large）
16英寸 中型（Medium）
8英寸 小型（Small）
4英寸 超小型（Tiny）
tiny very small in size adj. 极小的，微小的
a tiny girl
3.The whole world is connected.
网络连接了全世界。
connect v. 连接
connection n. 关系，联系
1.connect A with B 使A与B连接
2.connect sth. (to sth.) 使电、气、水等接通
3.connect sb./sth. (with sb./sth.) 与……有联系，把……联系起来
4. For instance, if we work on computers too long, we may get headaches or sore eyes.比如：如果我们使用的电脑工作的时间太长，我们就会头昏眼花。
for instance =for example 用来举例说明某一论点或情况，一般只举同类人或物中的“一个”为例。
such as 用来列举事物时，一般列举同类人或事物中的几个例子。
E.g.
（1）Many countries, Japan, for instance (for example),has a lot of earthquakes.
（2）I like fruits, such as apples, pears and bananas.
5. Besides, not everything we read on the Internet is true or good for us.
另外，我们在网上看到的东西并不都是真实的、有益的。
(1)besides与except用于肯定句时，except意为“除……之外（不再有）”；besides意为“除……之外（还有）”。
eg: I have another blue pen besides this one.
除了这支外，我还有另一支蓝色钢笔。（1+1，共2支）
We all passed the exam except Tom.
我们都通过了考试，汤姆除外。（整体中……汤姆一人不及格）
(2)except前几乎总有all、any、every、no及其复合词等词。
eg：He answered all the questions except the last one.
除了最后一个问题没答外，其余问题他都答了。
(3)except后接名词、代词、动名词和动词原形，这时except=but；
但except后跟副词、介词短语时，不能用but代替。
eg：The window is never open except in summer.
这扇窗户从来不开，除夏季外。
He did nothing except/ but clean the house.
他只是打扫了房子。
1b Read 1a and complete the following tasks.
1. Underline the topic sentence of each paragraph.
2.Complete the following diagram.
Paragraph 1._____________________________________________________ _____________________________________________________
Since computers were invented in the USA in the 1950s, they
have become very important in many areas of work and leisure.
Paragraph 2.____________________________________________________ _____________________________________________________
Since the Internet came into being, people’s lives at home have been changed, too.
Paragraph 3._____________________________________________________________________________________________________
Computers have improved our lives, but they have brought
problems, too.
computers
usage
problem
work
daily life
1.____________________________ of a spaceship
2.help doctors _____________________________
3._______________________________ in factories
4.help businessmen _____________________
1.play games and __________________________
2._______________ and _____________ at home
3.___________________ by sending e-mails and _______________________________
1.get headaches or _____________________
2.don’t have enough time __________________
3.something on Internet is not ________________
control the speed and direction
find diseases easily
control the robots
place and cancel orders
watch movies
do shopping
do business
communicate
chatting online
sore eyes
to study or exercise
true or good
Write a short passage with the title with One Day Without Computers. The following information may help you.
Suppose you were on a special day in 2030. During the day, there were no computers in the world. What trouble would you have You may begin like this:
One Day Without Computers
Today, when I got up, I just turned on the computer as usual, but it didn’t work. Then I tried my brother’s PC, my parents’, even my dog’s, but none of them worked. Later, it was reported on TV that all of the computers in the world broke down today…
One Day Without Computers
Today, when I got up, I just turned on the computer as usual, but it didn’t work. Then I tried my brother’s PC, my parents’, even my dog’s, but none of them worked. Later, it was reported on TV that all of the computers in the world broke down today. So the world is quite different.
For instance, we can’t play games, watch movies or do shopping at home. Besides, we can’t communicate by sending e-mails or chatting online. Without the help of computers, businessmen can’t place or cancel orders online. Teachers can’t give lessons to their students.What’s worse, robots controlled by computers can’t do dangerous work for humans. Even the doctors can’t find the diseases easily.
In short, we almost have trouble with everything without computers today.
课堂总结
We learn: 1. Some words: doubt, tiny, inside, brain,
cancel, connect
2. Some phrases: no doubt, for instance
3. Some sentences:
(1) There is no doubt that computers are very
useful in technology and business.
(2) Computers help us at work and at home, but
they must be used properly.
We can: 1. Talk about the importance of computers.
2. Write a composition by using our imagination.