(共27张PPT)
Unit 4 Amazing Science
Topic 3 China is the third nation that sent a person into space.
Section C
There are three stages in a man's life: He believes in Santa Claus. He doesn't believe in Santa Claus. He is Santa Claus.
男人成长有三个阶段：相信圣诞老人的存在；不相信圣诞老人的存在；自己是个圣诞老人。
Computers have become very important in our daily life. Do you know what we can do with computers
学习目标
1.学习新单词和短语： Some words: doubt, tiny, inside, brain, cancel, connect ，besides, properly;
Some phrases: no doubt, for instance
2.进一步学习定语从句。
3. Talk about the importance of computers.
4. Write a composition by using our imagination.
学习指导﹙学习1a﹚
学习指导：
1.自读1a,完成“Post-reading tasks”:划出每段的中心句；为短文选出最佳标题。
2.听1a录音, 初步感知对话内容，注意模仿其语音语调，纠正发音。
3.参照课后注解（P120）理解1a,划出难点，并找出重点短语和句子，完成1b.
自研共探：（8mins)
参照120页Section C的课文注释，2分钟自读1a,并口头翻译,要弄懂每个句子(若有不理解的语言点，可向别人求助），然后4人小组讨论，解决自学中的疑惑点 如： 1.找出下列短语：
毫无疑问 在电脑的帮助下； 被用于做某事；
使他们的心脏正常地跳动； 订购和取消订单；
出现，产生； 多亏因特网；代替做某事； 例如； 有充足的时间学习或锻炼； 此外；
2.小组合作，讨论电脑的优缺点,可以添加自己的观点,完成 1b。
3.再次阅读1a, 找出含有定语从句的句子，并把它画出来,理解。
学情展示（7mins）
教师指名或抽四个小组，在黑板上板书或口头展示小组内讨论结果，根据情况适当加分或加星。其他小组可质疑补充，回答正确的可适当加分或加星。教师可根据生成问题适当点拨。
What is the passage about
The Importance of Computers
1a 1. Tick the fields we use
the computer in.
education business
industry communication
daily life medical care
entertainment sports
Underline the topic sentence of each paragraph.
1. Since computers were invented in the USA in the 1950s, they have become very important in many areas of work and leisure.
2. Since the Internet came into being, people’s lives at home have been changed, too.
3. Computers have improved our lives, but they have brought problems, too.
Place The usage of computers
In space
In hospitals
In factories
In business
control the speed and direction
find diseases easily and solve other problems
do dangerous work
used to place and cancel orders
There is no doubt that we will be successful.
I don't doubt that they will be able to solve the problems.
doubt n. & v. 怀疑，疑惑
(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.)
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。
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
prep.在……内
adv.在里面
Language points
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
come into being
more and more
watch movies
thanks to
do business
instead of
chat online
make the world smaller
做买卖
形成，产生
越来越多
看电影
代替
网上聊天
使世界更小
多亏，由于
1. 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.
(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）”。 如：
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。如： 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。如： 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。
2. 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。
1b 2. Complete the following diagram.
computers
usage
problem
work
daily life
____________________________ of a spaceship.
help doctors _____________________________.
_______________________________ in factories.
help businessmen _____________________.
play games and __________________________.
_______________ and _____________ at home.
___________________ by sending e-mails and _______________________________.
get headaches or _____________________.
don’t have enough time __________________.
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
properly, besides, brought, get, enough
Computers have improved our lives, but they have _______problems, too. For instance, if we work on computers too long, we may _____ headaches or sore eyes. If we play computer games too much, we won’t have ______ time to study or exercise. ______ , 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 _______.
brought
get
enough
Besides
properly
Useful expressions:
no doubt; with the help of ;
keep their heart beating;
place and cancel orders ;
for instance; have enough time to do sth.
instead of doing； besides; come into being;
There is no doubt that ....
The Internet is making the world smaller like a village.
2 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.
You can write it like this:
巩固提升
根据句意及首字母填空。
①You did quite well in your homework , but you still make some t____ mistakes .
②Because of the heavy rain , the sports meet had to be c_________.
③There is no d_________ that learning English well is very important to teenagers .
④This railway c_____ Beijing with Tianjin .
It’s about 100 kilometers long .
二、单项选择
( ) 1 -- What did Mrs. Green tell the boys to do
-- She told them ____ football in the classroom..
A didn’t play B to play
C not play D not to play
( ) 2 If you want to search the Internet , make sure the computer ___ the Internet first .
A is connected to B is created by
C is put into D is communicated with
D
A
( ) 3 -- _____ swim in the river
-- Oh , no . Our teacher told us ___ here . It’s dangerous .
A Why don’t ; not swim B Why not ; not to swim
C Why not ; don’t swim D Why don’t ; don’t swim
( ) 4 Some people ____ my ability , but I’ll ___ that with my actions .
A think ; say B believe ; know
C know ; believe D doubt ; prove
B
D
( ) 5 Robots have already help us do lots of dangerous and difficult work since they _____ .
A come into being B came into being
C come about D came about
( ) 6 English and computers ____ in many fields .
A used widely B use widely
C has widely used D are widely used
( ) 7 I was very sorry I kept him ____ for me two hours .
A waited B to wait C waiting D waits
B
D
C
