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1、Unit 4 Amazing ScienceTopic 3 China is the third nation that sent a person into space. Section C叫奠坷矣车负勾隅狈氓候竭儿岛揽劳硬脆社坑颊强蛋镊哼诀羚段短伤肛磋Unit4Topic3SCUnit4Topic3SC1.掌握本课的掌握本课的重点词汇和短语重点词汇和短语，继续学习继续学习定语从句定语从句。2.能够快速能够快速找到段落找到段落的中心句的中心句、辨别论证句。、辨别论证句。3.电脑和网络是把双刃剑，电脑和网络是把双刃剑，利用它服务于学习、生活的同时，利用它服务于学习、生活的同时，不能沉溺于游戏，
2、不能沉溺于游戏，要自觉远离不良信息的诱惑。要自觉远离不良信息的诱惑。学习目标学习目标墟睛车椿寅外孩泞恋卒窒悲拜谋带芥溜钠鲜薛屁参疤腐折褒敲暇痰彼跳而Unit4Topic3SCUnit4Topic3SC1a 1. Tick the fields we use the computer in. education business industry communication daily life medical care entertainment sports 绳荷铆羹盔隔猎嫡谅剐粤胆钡酥滥聚袁遥戈孰竣寝饿爷澄傲宿盎巡亢赁洽Unit4Topic3SCUnit4Topic3SCWhat is t
3、he passage about ?The Importance of Computers椒瓷驱压绸畜拘碑蛙肇称寇肢靡坚海缮膨砚靴跟谆编歪外唐局扎彝峦每掌Unit4Topic3SCUnit4Topic3SCUnderline 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 ca
4、me into being, peoples lives at home have been changed, too. 3. Computers have improved our lives, but they have brought problems, too. 曝志霜据耸傣臀原接明劲怨粗发科炬镭持罩慢茨矢奴怕焊挣多收抒番岳杭Unit4Topic3SCUnit4Topic3SCPlace The usage of computersIn spaceIn hospitalsIn factoriesIn business 趁茂缆搁诚宵距獭鳖苇滤棋找缘纠碴德恫饶嘱帛朽余羹撞畅谦衍翔阁慢黎Un
5、it4Topic3SCUnit4Topic3SC1.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。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. 币庇昔榜呕响酣狰歹努湘阳狸恢拆纺蜜暖恫尚鸽恕劲哪冀龟漆敖税待巧厢Unit4Topic3SCUnit4Topic3SC2.For example , tiny computers which are inside patient
6、s bodies can keep their hearts beating normally.例如，病人体内植入微电脑能例如，病人体内植入微电脑能帮助病人的心脏正常跳动。帮助病人的心脏正常跳动。 tiny very small in size adj. 极小的，微小的极小的，微小的城杰烹析海育鳖钠瑚鸿绕须榷漫厕噪阿喳唆岩啪囊息候慑锑罚测怯敖介亿Unit4Topic3SCUnit4Topic3SC3.The whole world is connected.网络连接了全网络连接了全世界世界。 潘邀揖歧雀钾石动困壬杆均乖罚祷蕴啸章震炼邑蛋辅咐样猾炸建呆叹匆攘Unit4Topic3SCUnit4T
7、opic3SCcome 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，做买卖做生意，做买卖形成，产生形成，产生越来越多越来越多被用来做某事被用来做某事代替代替网上聊天网上聊天使世界更小使世界更小多亏于，由于多亏于，由于今乌鬼刚膳期疾桶今烦绊逆损害但戳株蚜假矗啼抡腻析嫡坠饺揭剑阅漂烈Unit4Topic3SCUnit4Topic3SC1. For instance, if we work on computers t
8、oo long, we may get headaches or sore eyes.比如：如果我比如：如果我们使用的电脑工作的时间太长，我们就会头昏眼花。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 用来举例说明用来举例说明such as 用来列举事物用来列举事物E.g. （1）Many countries, for instance (for example), Japan, has a lot of earthquakes. （2）I like fruits, such as apples, pears and bananas. 2.
9、Work on 从事，专心于从事，专心于坏捎酒益桶禄晋耕忱灾殿罢两盎隋轮基唤扯喷谭疟咋放轩欢柜克辅肠恐并Unit4Topic3SCUnit4Topic3SC3. 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。另外，我们在网上看到的东西并不都是真实的、有益的。 注意：注意：besides与与except用于肯定句时，用于肯定句时，except意为意为“除除之外（没有）之外（没有）”；besides意为意为“除除之外（还之外（还有）有）”。 如：如： I
10、 have another blue pen besides this one.除了这支外，我还有另一支蓝色钢笔。（除了这支外，我还有另一支蓝色钢笔。（1+1，共，共2支）支）We all passed the exam except Tom.我们都通过了考试，汤姆除外。（整体中我们都通过了考试，汤姆除外。（整体中汤姆一人汤姆一人不及格）不及格）4. use properly 合理地使用合理地使用条啄述玉习阴活绕篡络练缴祁场滴井费氓查条彩璃滋杜箩臻辰翘浦茵序探Unit4Topic3SCUnit4Topic3SC1b 2. Complete the following diagram. comp
11、uters usageproblemwork daily life1.get headaches or _. 2.dont have enough time _. 3.something on Internet is not _.1.play games and _. 2._ and _ at home. 3._ by sending e-mails and _. 1._ of a spaceship. 2.help doctors _. 3._ in factories. 4.help businessmen _.control the speed and direction find di
12、seases easilyplace and cancel orders control the robotswatch movies do shopping do businesscommunicate chatting online sore eyesto study or exercise true or good to us莲勇洱爱耿扫尉娠躲捣尺售殿圾绞撰倍歧呀夫禄雷舜唐康识化虚鹿估拴须Unit4Topic3SCUnit4Topic3SCproperly, besides, brought, get, enough Computers have improved our lives,
13、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 us at work and at home, but t
14、hey must be used _. broughtgetenoughBesidesproperly愧选挠哭荫辰甚腋荐贡过涪囊筐锭搂挺候殉锰猩稿币尊渣圃畏纳酗命涤撵Unit4Topic3SCUnit4Topic3SC2 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 compute
15、rs 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 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 t
16、he computers in the world broke down today 愧曝绳连黎卷挝座畔詹啮佳蓬炳脱脊涨肌制瑚派叠毅世盐赁染幌胎岔丈旷Unit4Topic3SCUnit4Topic3SCOne 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 wa
17、s 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 sending e-mails or chatting online. Without the help of computers, businessmen cant place
18、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 have trouble with everything withoutcomputers today. You can write it like this:入棍
19、直迹硝慨扩羌眷馅竹失淖懊姑企百烁令讨棱忍烽崎颖瘁帕羚窗琅而先Unit4Topic3SCUnit4Topic3SC小结小结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 a
20、nd 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.迂征绩弘柬呜侦睡赖淡孰刊瞅颤删乱眯糕集祷茧馏殆等饱辅雕弄逢阉奔丁Unit4Topic3SCUnit4Topic3SC1. 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.传祝栽棠充讣蛹渍肿纠崭赛盏警矣烽瞒泪倍知傲撬嘘薪派界姥黍谩翅氛脑Unit4Topic3SCUnit4Topic3SC
