九上U4T2SC(吴小桃).ppt

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1、 Unit 4 Amazing Science Topic 2 When was it invented?Look at the pictures,then ask and answerpaper/wood/write on towel/cotton/wash facetoothbrush/plastic/brush teethA:Whats this in English?(Whats the English for this?)B:Its A:Whats it made of/from?B:Its made of/fromA:Whats it used for?B:Its used for

2、/to a TV/John Baird/1926A:Whats this in English?B:Its A:Who was it invented by?B:It was invented by A:When was it invented?B:A light bulb/Thomas Edison/1879Have you ever seen a robot?Now,people are surprised at the rapid development of robots.be surprised at 对 感到惊讶The foreigners are surprised at the

3、 rapid development of China.What can robots do for us?Are robots meant to be our servants or our masters?n.仆人be meant to do sth.应该做RobotsOur Servants in the Future?Listen to the passage and choose the best answers.1.Will robots be our servants or our masters?A.Our servants B.Our masters C.No one kno

4、ws for certain2.According to the passage,which of the following sentences is TRUE?A.Robots may think and act for themselves in a few years.B.Were sure that robots will think and act for themselves in a few years.C.Robots can think and act for themselves now.RobotsOur Servants in the Future What will

5、 our future be like?No one knows for certain,but most people think that robots will be part of our lives.Will they be friendly or unfriendly?So far,robots havent caused us any problems.They work for us like servants all the time.They help us do dangerous and difficult work.People are surprised at th

6、e rapid development of robots.In a few years,perhaps robots will think and act for themselves.However,once robots start to think for themselves,problems may appear.One scientist warns that if robots start to think for themselves,they will no longer want to be our servants,but our masters.That scient

7、ist also warns that if we are lucky,they might treat us as we now treat our pets;if we are not lucky,who knows what will happen?Perhaps there will be a war between human beings and robots.for certain确切地 How much will the car cost？I cant say for certain.once“一旦就”,引导时间状语从句Once you get used to it,you w

8、ill like it.think for oneself 独立思考I often teach my students to think for themselves.warn+that 从句 warn sb.(not)to do.告诫某人(不）做某事 no longer=not any longer 不再Youre no longer a child./You arent a child any longer.treat as 以 方式对待/把 看做Read the passage and discuss the questions with your partner.Pair work 1

9、.Do you think that robots will be part of our lives in the future?2.Do you think robots can think or act for themselves?Yes,we think so.They can help us do some dangerous and hard work.They work fast and they are never tired.We dont think so.Robots are created by human beings.They can work for us.So

10、 we can control them.Find and circle the words in 1a according to the following meanings,then write them down.1.to tell somebody that something bad or dangerous may happen so that they can prevent it(w_)2.to make something happen or appear（c_)3.a person who is paid to do house work for a family （s_）

11、4.sure and confident,without any doubts（c_)5.to behave in a special way towards somebody or something(t_)arnauseervantertainreatGroup work Discuss the advantages and disadvantages of robots.Advantages do some work better than humans do dangerous workdo hard work work faster than humans work without

12、payrobots save peopleDisadvantages make humans lose their jobs make humans lazy Once robots think for themselves,they will no longer want to be our servants,but our masters.greatlymedicalhealthinsidediscoveringeffectsListen to the tape and fill in the blanks.For more than 100 years,peoples lives hav

13、e been changed _ by inventions.For example,the X-ray machine is a wonderful invention in the _ field.It has made a great contribution to humans _.With its help,doctors can examine the _ of their patients bodies.It is used for _ illnesses.But it also has bad _ on our health.So the X-ray machine shoul

14、d be used carefully.make a contribution/contributions to(doing)sth 为做贡献 He made great contributions to science.We should make a contribution to protecting the environment.have an effect/effects on 对有影响 Playing computer games too much has a bad effect on health.一、选择一、选择所给所给词的词的适当形式填空。适当形式填空。betweenan

15、d;no longer;for certain;surprise;treatas;have bad effects on;warn1.We _ robots _ our pets at present.2.The X-ray machine also _ peoples health.3.We _ not to play soccer in the street by teachers yesterday.4.That movie is about a war _ the robots _ humans beings.5.Do you know the answer _?6.We are _

16、at the _ news.treat ashas bad effects onbetween andfor certainExerciseswere warnedsurprisedsurprising二、用二、用所所给给词词的适当的适当形式填空。形式填空。1.We _ (warn)not to play soccer in the street by teachers yesterday.2.I hope our difficulties will soon _ (appear).3.The boss is so _(friendly)to his workers that none of

17、them want to work for him for long.4.Hearing the _ news,all of us felt _ (excite).5.The U.S.A.is _ (develop)than any other country in the world.were warneddisappearunfriendlyexciting excitedmore developed二、选择正确的答案 1.The workers made great contributions _the tall building.A.to build B.to building C.b

18、uild 2._of the students are playing outside,for its raining.A.No one B.None C.Someone 3.The policeman warns the boys _ on the street.A.to play B.not to play C.dont to play 4.Im _a child.A.any longer B.no longer C.not any longer 5.Animals _our friends.A.should be treated as B.treat as C.are treated b

19、y 6.The bridge _ when Mr.Lei came to this town.A.is building B.has built C.was builtSummary1.Some useful expressions2.一般过去时的被动语态 3.认识机器人的用途和优缺点构成：构成：be(was/were)+V 过去分词过去分词 Design a robot.Write a passage about it.The following questions may help you.1.Whats its name?2.What does it look like?3.What c

20、an it do for us?4.Can it think for itself?5.What are its advantages and disadvantages?Here is a robot._.In short,this robot is very useful to us.Homework1.for _ 确切地2._ as 以的方式对待3.be _ at 对感到惊讶4._ for oneself 为自己考虑5.no _/not any _ 不再6.have an _ on 对有影响7.make a _ to 对做贡献8._ sb.(not)to do sth.告戒某人（别）做某事certaintreatsurprisedthinklongerlongereffectcontributionwarn