Unit 5 Using Language (ppt课件) -2022新人教版(2019)《高中英语》选择性必修第一册.pptx

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1、 Using Language:Using Language:chemical versus organic farmingIn this class we will:u To know the meanings of chemical farming and organic farming.u To know the advantages and disadvantages of both chemical farming and organic farming.u To master some transitional words or phrases in the text.u To e

2、xpress opinions on chemical farming and organic farming,and write an argumentative essay.Whats the main idea of the text?The text mainly talks about chemical farming and organic farming._ can cause many problems,as an alternative,some people switch to _.Chemical farmingorganic farmingOrganic farming

3、 is simply farming without using any chemicals.1.What is chemical farming?2.What is organic farming?Skim the text,and then answer the following questions.Chemical farming is farming using chemical pesticides and artificial fertilisers.bacteria and insectsprohibiteddamage they usegrow too fastnutriti

4、onnatural waste from animalsevery yeardifferent depthsdemand for food around the worldchange the kind of cropDACBRead and Think(organization)Title Text type:Exposition The _ and _ of chemical farming.benefitsproblemsPart 1:(Para 1&2)What organic farming is and _.how it keep the soil richPart 2:(Para

5、 3&4)Part 3:(Para 5)Conclusion 1.Why did many farmers welcome the introduction of chemical farming?2.What concerns many people about the use of pesticides?Para.1 1.Why did many farmers welcome the introduction of chemical farming?2.What concerns many people about the use of pesticides?Self-study Sel

6、f-study 3.What is one problem with the use of chemical fertilisers?Para.2 4.How is organic farming different from chemical farming?Para.3 3.What is one problem with the use of chemical fertilisers?4.How is organic farming different from chemical farming?5.Why do organic farmers change the kind of cr

7、op grown in a field every year?Different crops are grown because they put important minerals back into the ground,making it ready for the next batch of crops.Para.4 5.Why do organic farmers change the kind of crop grown in a field every year?6.What is the goal of using organic farming methods?Do you

8、 think it can be reached?Why or why not?Para.4 6.What is the goal of using organic farming methods?Do you think it can be reached?Why or why not?chemical farming Thinkingorganicfarming advantagesdisadvantages fight crop disease increase production lower cost crops look beautiful outside.good food av

9、oiding damage to the environment or to peoples health.harm the land harm peoples health harm the environment crops are less in nutrition.cannot meet the demand for food more efforts and higher cost smelly gases.however,but,on the contrary,instead,on one hand on the other hand for example,for instanc

10、e,in fact,such as,take for example bothand,not onlybut also,in addition,and,also,as well,whats more,besides,furthermore,moreover,whats worsewhyis because,therefore,for this reason,thus,consequently,as a ressultas for,as an alternativeRead for writing 2(discourse markers)contrast illustrate add cause and effectintroduce a new topicHow to write an argumentative essaybrainstormpoints and detailsorganizationdiscourse markersargumentThank you for your watching

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