【课件】Unit+4+Topic+3+Section+C课件仁爱版英语九年级上册.pptx

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1、Unit 4 Amazing ScienceTopic 3 China is the third nation that sent a person into space.Section CLanguagego als1.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)Comp

2、uters help us at work and at home,but they must be used properly.W ar mingupWhat 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.W ar mingupDoctors can find diseases easily with the help of computers.For

3、 example,tiny computers which are inside patients bodies can keep their hearts beating normally.W ar mingupIn space,computers have been used to control the speed and direction of a spaceship.Lear ning 1a Read and understand.1.Tick the fields we use the computer in.education business industry communi

4、cation daily life medical care entertainment sports Lear ning1a Read and understand.2.Can you give an example of the use of the computer in one of the fields above?Lear ning The Importance of Computers Since computers were invented in the USA in the 1950s,they have become very important in many area

5、s 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

6、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.Lear

7、 ning Since the Internet came into being,peoples 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 se

8、nding e-mails and chatting on line.The whole world is connected.The Internet is making the world smaller,like a village.Lear ning 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 g

9、ames too much,we wont have enough time to study or exercise.Besides,not everything we read on the Internet is true or good for us.Computers help us at work and at home,but they must be used properly.LanguagepointsThere is no doubt that we will be successful.I dont doubt that they will be able to sol

10、ve 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 hell 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。Languag

11、epoints 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 Languagepoints3.The whole world is connected.

12、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Languagepoints4.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

13、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.Languagepoints5.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。

14、(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）Languagepoints(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 on

15、e.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。Lear ning1b Read 1a and complete the following taskes.1.Underline the topic sentence of each paragrap

16、h.2.Complete the following diagram.Lear ningParagraph Paragraph 1._ 1._ _ _ Since computers were invented in the USA in the 1950s,they have become very important in many areas of work and leisure.Paragraph Paragraph 2._ 2._ _ _ Since the Internet came into being,peoples lives at home have been chang

17、ed,too.Paragraph Paragraph 3._ 3._ _ _ Computers have improved our lives,but they have brought problems,too.Lear ningcomputers usageproblemwork daily life1._ of a spaceship2.help doctors _ 3._ in factories4.help businessmen _1.play games and _ 2._ and _ at home 3._ by sending e-mails and _ 1.get hea

18、daches or _2.dont have enough time _3.something on Internet is not _control the speed and direction find diseases easilycontrol the robotsplace and cancel orders watch movies do shopping do businesscommunicate chatting online sore eyesto study or exercise true or goodLear ning Write a short passage

19、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 co

20、mputer 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 Lear ningOne Day Without Computers Today,when I got up,I just turned on the computer as usual,but it didnt

21、 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 world is quite different.For instance,we cant play games,watch movies or do shopping at home.Besides,we cant communicate by sen

22、ding 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,robots controlled by computers cant do dangerous work for humans.Even the doctors cant find the diseases easily.In short,we almost hav

23、e trouble with everything without computers today.Summar yWe learn:We can:1.Talk about the importance of computers.2.Write a composition by using our imagination.Ex er cise1.I like the boy.The boy always help others.I like the boy _always helps others.2.Shenzhou X is a spaceship.It was launched with

24、 three astronauts in 2013.Shenzhou X is a spaceship _was launched with three astronauts in 2013.3.China is a great country.China has about 5000 years of history.China is a great country_ has about 5000 years of history.4.In factories,robots are controlled by computers.Robots are controlled by comput

25、ers are like human brains.In factories,robots are controlled by computers_ are like human brains.which/thatwho/thatwhich/thatwhich/thatEx er ciseproperly,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 _ he

26、adaches 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 us at work and at home,but they must be used _.broughtgetenough BesidesproperlyHomew ork1.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.