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1、Unit 2 Saving the EarthTopic 3 Section C 学习目标学习目标预习检测预习检测知识梳理知识梳理课堂总结课堂总结学习导航重点探究重点探究当堂当堂检测检测新课导入新课导入Use but,and,while to answer the following questions.What activities should we do to protect the environment?What activities shouldnt we do to protect the environment?学习目标学习目标能熟悉并正确运用本课时的重点单词和短语能熟悉并正确
2、运用本课时的重点单词和短语12能能通通过阅读文章，文章，了解了解现代科学技代科学技术在在环境保境保护方面的作用方面的作用1._the problem,we are looking for new ways to produce power.A.Solve B.Solving C.To solve D.Solves2.In the near future,many robots_to help us do housework.A.will be used B.will use C.are used D.will be use 预习检测预习检测CA3.The train can _a speed
3、of 300 km per hour.A.arrive B.drive C.develop D.reach4.Not only the parents,but also the child_to have a trip.A.decide B.decides C.deciding D.to decide5.The price of houses are increasing_.A.rapid B.rapidly C.difficult D.quickDBB知识梳理知识梳理Key points 1.Some countries use nuclear energy to produce power
4、.use sth.to do sth./use sth.for doing.使用某物来做某事eg:People used bamboo to write with in the past.在过去人们使用竹子写字。People use wind for producing electricity.人们用风发电。Key points2.Its key disadvantage is that the process requires a long time(up to 30 days)and the cost is high.它最大的缺陷是生产过程需要很长时间（长达30天）和成本高。process
5、 n.步骤，过程 v.加工，处理require v.需要，需求require 有两种用法：*require(doing)sth.表示主语“该了”。eg:The floor requires washing.地板该洗了。*be required to do sth.表示主语必须（被要求）eg:Students are required to attend classes.学生必须按规定上课。Key points3.Its too small to hold many people,but the larger models will be developed in the near future
6、.它太小，不能承载太多的人，但在不久的将来，更大的车型将会被研制出来。hold v.容纳，包含；eg:The plane holds about 300 passengers.这架飞机可容纳大约300名乘客。hold v.拿着，抓住，抱住；eg:He was holding the baby in his arms.他抱着婴儿。hold v.召开，举行，进行（比赛，会议等）；eg:The Olympic Games are held every four years.奥运会每四年举行一次。hold v.(打电话时）等待，不挂断；eg:Hold on,please!请稍等。Key points4
7、.The train can reach a top speed of 431 km per hour.这辆火车最高速度能达到431公里每小时。reach a speed of+具体速度 达到某个速度拓展：拓展：at a speed of+具体速度以某个速度,可用high,low,full等形容词修饰speed。eg:Beijing-Tianjin train reaches a speed of 300 km per hour.北京至天津线火车时速达到每小时300千米。Key phrases1.寻找新方法2.在20世纪90年代3.首批国家之一4.全世界的人5.在人们的日常生活中6.在不久的将
8、来7.达到最高时速8.更贵得多9.用来做10.被用作look for new waysin the 1990sone of the first countriespeople all over the worldin peoples everyday/daily livesin the near futurereach a top speedmuch more expensiveuse to do be used for doing/to do sth.探究一现代科学技术在环境保护方面的运用构建全球能源互联网构建全球能源互联网Do you know them?Its an electric c
9、ar.It works well,but its slow and cant run for long.Its a maglev train.Its advantages are quiet,fast and clean,but its too expensive.磁磁悬浮列浮列车n.技技术China is one of the first countries in the world to use biogas technology.沼气沼气ReadingWatch the video about 1a.In many countries,people produce power from
10、coal,but it is very dirty and causes acid rain.Some countries use nuclear energy to produce power.However,nuclear power can be very dangerous.To solve the energy problem,people all over the world are looking for new ways to produce power.Read Paragraph 1 again,and then mark True(T)or False(F).()Its
11、good that people produce power from coal.()Nuclear power is dangerous.So we cant use it.()To solve the energy problem,people all over the world are looking for new ways to produce power.TFT China is one of the first countries in the world to use biogas technology.Farmers recycle straw,grass and anim
12、al waste to make biogas.This renewable energy is used in peoples everyday lives.Its key disadvantage is that the process requires a long time(up to 30 days)and the cost is high.1.What do farmers use to make biogas?2.It is the biogas perfect?Why?They recycle straw,grass,and animal waste to make bioga
13、s.No,it isnt.Because its key disadvantage is that the process requires a long time(up to 30 days)and the cost is high.Answer the following questions.Electric vehicles were _ in the 1990s.On April 11,2010,a new kind of electric vehicle _“Yezi”was shown in the 2010 Shanghai World Expo.It produces _ fr
14、om the sun,the wind and CO2.It can not only protect the environment but also _ energy.Its too small to hold many people,but _ models will be developed in the near future.develop,electric,name,save,large developednamedelectricitysavelarger In China,the best-known maglev train is the German-built one
15、in Shanghai.It takes people just 7 minutes to go to the airport 30 km away.The train can reach a top speed of 431 km per hour.It is quiet and quick.There is no wheel noise,because there are no wheels.Maglev trains are very energy-efficient and do not pollute the air.However,maglev guide paths are mu
16、ch more expensive than traditional steel railways.1.去30公里以外的飞机场只需花费人们七分钟的时间。It takes people just 7 minutes to go to the airport 30 km away.2.火车最高时速能够达到每小时431公里。The train can reach a top speed of 431 km per hour.Translate the sentences.1b Read 1a and match the words with the pictures on Page 48.A.aci
17、d rain B.nuclear energy C.biogas ACB()()()1c Read 1a again and complete the table.ItemAdvantageDisadvantagebiogas electric vehicle maglev train renewablelong process and high cost for its building save energy,no pollutiontoo small to hold many people quiet,quick,energy-efficient,no pollution much mo
18、re expensive than traditional steel railways Retellcoal-dirty,acid nuclear energy-dangerous electric vehicles-the sun,the wind and CO2-protect the environment,save energy,smallmaglev train-German-built,quiet,quick,no wheel noise,energy-efficient,not pollute the air biogas technology straw,grass and
19、animal waste,everyday lives,require,the high cost 2a Read the passage below and match the pictures with the sentences.Then discuss in detail the use of one energy source.The sun,wind,waves and heat from deep in the earth are energy sources.They will never run out so they are called renewable sources
20、.In 2011,about 16%of energy used worldwide came from renewable sources.The use of it is increasing rapidly each year.1.Wind can produce electricity in many places.2.People use sunlight to produce electricity.3.Sea waves are used for producing electricity.4.People use hot water or steam from deep in
21、the earth to produce electricity and heat for factories,schools and homes.（）（）（）（）24132b Take notes on your discussion and write a passage with them.Sunlight can produce a lot of energy.People began to use the energy from the sunlight in different ways many years ago.We can use it to warm the house
22、in the winter,to heat the water for baths,and to produce electricity.Whats more,we can even use it to run vehicles directly in the near future.As is known to us,the energy from the sunlight has a lot of advantages.For example,it is clean,renewable and non-polluting.Besides,it does no harm to our nat
23、ure.So wed better use it as much as possible.You can write it like this:通过以上活动，我们可以知道：现代科学技术在环境保护方面起了非常大的作用。例如沼气技术，新型电动汽车，_等。太阳、风、海浪和来自地球深处的热量都是能源。它们永远不会用完，所以它们被称为_。当堂当堂检测见检测见DCFDCF课课件件活动小结活动小结磁悬浮列车可再生资源 根据句意及汉语提示完成句子。根据句意及汉语提示完成句子。1.Never _(放弃)studying,youll succeed one day.2.Remember to _(关掉)all the electricities when you leave the room.3.The bus has six _(轮子).4.There is a _(深的)hole in the tree.Maybe there are some animals in it.当堂检测当堂检测give upshut offwheelsdeepSummaryUnit 2Topic 3 Section C重点单词短语：require；hold；reach a speed of；use sth.to do sth./use sth.for doing.了解现代科学技术在环境保护方面的作用