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1、Unit 4 Amazing Science Topic 3 China is the third nation that sent a person into space.,Section C,1.掌握本课的重点词汇和短语, 继续学习定语从句。 2.能够快速找到段落 的中心句、辨别论证句。 3.电脑和网络是把双刃剑, 利用它服务于学习、生活的同时, 不能沉溺于游戏, 要自觉远离不良信息的诱惑。,学习目标,1a 1. Tick the fields we use the computer in.,education business industry communication daily l
2、ife medical care entertainment sports,What is the passage about ?,The Importance of Computers,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 b
3、eing, peoples lives at home have been changed, too. 3. Computers have improved our lives, but they have brought problems, too.,Paragraph 1,control the speed and direction of a spaceship,find diseases easily and solve other problems,do dangerous work,used to place and cancel orders,1.There is no doub
4、t 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。,(1)doubt (n.),Doubt is the key to knowledge.,There is no doubt that we will be successful.,(2)doubt (vt.)+ 从句,I doubt whether/if hell change his mind.,I dont doubt that they will be able to solve the problems.,(3)doubt (
5、vi.)+ about / of,There is no reason to doubt of his honesty.,Paragraph 1,doubt n. & v. 怀疑,疑惑,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跳动。,tiny very small in size adj. 极小的,微小的,a tiny girl,Paragraph 1,Paragraph 2,3.The
6、 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 A to B 把A连接到B上,Paragraph 2,come into being more and more be used to do sth thanks to do business instead of chat online make the world smaller,做生意,做买卖 形成,产生 越来越多 被用来做某事 代替 网上聊天 使世界更小 多亏于,由于,Para
7、graph 3,1. 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 such as 用来列举事物 E.g. (1)Many countries, for instance (for example), Japan, has a lot of earthquakes. (2)I like fruits, such as apples, pears and
8、bananas. 2. Work on 从事,专心于,3. 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。,注意:besides与except用于肯定句时,except意为“除之外(没有)”;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
9、过了考试,汤姆除外。(整体中汤姆一人不及格) 4. use properly 合理地使用,1b 2. Complete the following diagram.,computers,usage,problem,work,daily life,get headaches or _. dont have enough time _. something on Internet is not _.,play games and _. _ and _ at home. _ by sending e-mails and _.,_ of a spaceship. help doctors _. _ i
10、n factories. help businessmen _.,control the speed and direction,find diseases easily,place and cancel orders,control the robots,watch movies,do shopping,do business,communicate,chatting online,sore eyes,to study or exercise,true or good to us,Exercise,properly, besides, brought, get, enough,Compute
11、rs 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 wont have _ time to study or exercise. _ , not everything we read on the Internet is true or good for us. Computers help u
12、s at work and at home, but they must be used _.,brought,get,enough,Besides,properly,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 tro
13、uble 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 didnt work. Then I tried my brothers PC, my parents, even my dogs, but none of them worked. Later, it was reported on TV that all of the computers in the world
14、 broke down today,One Day Without Computers Today, when I got up, I just turned on the computer as usual, but it didnt work. Then I tried my brothers PC, my parents, even my dogs, but none of them worked. Later, it was reported on TV that all of the computers in the world broke down today. So the wo
15、rld is quite different. For instance, we cant play games, watch movies or do shopping at home. Besides, we cant communicate by sending e-mails or chatting online. Without the help of computers, businessmen cant place or cancel orders online. Teachers cant give lessons to their students. Whats worse,
16、 robots controlled by computers cant do dangerous work for humans. Even the doctors cant find the diseases easily. In short, we almost have trouble with everything without computers today.,You can write it like this:,小结,We learn: 1. Some words: doubt, tiny, inside, brain, cancel, connect 2. Some phr
17、ases: 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.,作业,1. Read 1a. 2. Memorize the useful expressions and key sentences which we learned today. 3. Finish Section C in your workbook. 4. Review Sections A-C.,
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