Unit1 Workbook ppt课件（含音频素材） -（2020版）新牛津译林版高中英语必修第三册.zip

Page 61 B2 Page 61 B2 Chinas efforts to stop desertification Chinas efforts to stop desertification1.19782.More than 603.stop animals4.how quickly5.19956.use water responsiblyDesertification is a serious environmental problem around the world.As the name suggests,when non-desert areas slowly become deserts,desertification happens.Desertification can be caused by several factors,such as global warming,overpopulation and droughts.If people use the wrong farming methods or cut down too many trees,farmland can turn into desert.With about two billion people directly affected,desertification has become growing concern for many countries.We need to take steps to prevent desertification.We should pay attention to how much energy we use in our daily life.That way,we can reduce the amount of carbon dioxide released.We can walk or cycle short distances,and use less water.We can also protect our forests by reusing paper and not using disposable chopsticks.Whats more,we should try to make people around us aware of the problem and encourage them to change their daily habits in the same way.deforestationdesertificationAir PollutionWater PollutionWe are faced with all kinds of environmental problems nowadays.But what is the one that Rachel Carson dealt with in her book Silent Spring?Pesticides.Pesticides have been regarded by many other environmentalists as a type of pollution,too.It is believed by her that pesticides are poisons which should be used as a last resort and if used,then they should be used with extreme caution.Rachel Carson(1907-1964)biologist,writer,ecologistintense love for nature since her childhood“Humans have now acquired a fateful power to alter and to destroy nature.But Man is a part of nature,and his war against nature is inevitably a war against himself.”Rachel CarsonAuthor BackgroundHer LifeA fable for tomorrowA fable for tomorrowAdapted from Silent Spring,by Rachel CarsonPart I:Main Idea (Para 1-6)Contrast:a town before&after the disaster Before ColorSound Motion Overall impression:vibrant,harmonious,beautiful AfterColorSound Motion Overall impression:lifeless,deserted,awfulThere was once a town in the heart of America where all life seemed to live in harmony with its surroundings.Paraphrase:Once upon a time there was a town in the central part of America where all living things seemed to co-exist peacefully with their environment.in spring,white clouds drifted above the green fields.in spring,white clouds floated above the green fields just like flowers.delighted the travelers eye.(para2)gave the traveler great satisfaction/enjoyment(what a harmonious and fascinating view)mysterious illnesses swept the flocks of chickens;the cattle and sheep sickened and died.(para.3)strange diseases quickly struck down large numbers of chicken;the cattle and sheep became ill and died.(para 5)deserted:visited by nobody;abandoned(para 6)stricken worldstrike,struck,stricken：患病的，受挫的，受患病的，受挫的，受侵袭的侵袭的flood-stricken districtearthquake-stricken districta family stricken by genetically inherited cancer Part II:Discussion(Para 7)Why did the author paint such a beautiful picture of a non-existent town?What was she trying to appeal to?Nature is innocent,man is a part of nature and is blessed by nature.We human beings should follow natures law and feel gratitude for natures blessings.Only in this way can we establish a happy homeland.Nature is an integral nature.We should promote our knowledge of relation of chemicals and ecology.Before we use chemicals,we should know clearly about their effects on the environment and people,and make reasonable use of them.Page 57 A1.economic2.living3.survive4.process5.profit6.length7.poverty8.formerB1.are alive with2.a variety of3.came up with4.called for/have called for5.sprang to mind6.get rid of7.In defence of8.give rise toUnit 2 Wordlist（16-19页）页）Homework1.完成第三十三期报纸；完成第三十三期报纸；2.巩固巩固Unit 2 第第16-19页的生词。页的生词。