Unit 5 Reading for writing Chemical Versus Organic Farmingppt课件-(2022新)人教版高中英语选择性必修第一册.pptx

1、Chemical Versus Organic Farming?1. Have you ever been to the countryside?2. Do you know how to work on a farm? Step 1: warming upLets go to the farm!First, buy or select the seeds from the store.Second, we need to plough or turn over the soil.Third , we sow the seeds in the soil.Finally, we can harv

2、est our grain/sorghum/peanuts . In order to improve the output of the crop, we need to rid the soil of the weed, water the crop, fertilize the soil and kill off the pest.water the croprid the soil of the weedfertilize the soilkill off the pest to improve the output of the crop What can be used to ma

3、ke plants grow better?Fertilizer. Chemical fertilizers Natural waste from animalschemical fertilizer cow dung用化学肥料和有机肥料的区别用化学肥料和有机肥料的区别:To protect the crops, farmers have to kill off the harmful pests.What is used for killing pests, especially insects?Pesticides.Organic FarmingOrganic farming is sim

4、ply farming without using any chemicals.Which tomatoes do you prefer?5 yuan / kg30 yuan / kgNormal tomatoesOrganic tomatoes C Organic methods for producing rich soil D The problems with chemical farmingPara. 1-2Para. 3Para. 4Para. 5 A What organic farming is B Why man-made chemicals are still used i

5、n farmingMatch the main ideas (A-D) below with the paragraphs. Para.Main IdeaDetail 1-2 Pesticides can kill helpful _Some pesticides have been _ because of the _Crops grown with chemical fertilisers usually _ to be full of _.bacteria and insects prohibiteddamage they causegrow too fast nutritionDPar

6、a.Main IdeaDetail 3Many organic farmers use _ _ as fertiliser.4 They often _ grown in each field _.They also plant crops that use _ of the soil to help keep it rich.from animals change the kind of crop every year different depths natural wasteACPara.Main IdeaDetail 5 Organic farming is nowhere near

7、able to meet the high _.demand for food around the world BRead the whole text and Choose the best answers. ( )1Why did many farmers welcome the introduction of chemical farming? AThey can fight crop disease and increase production.BThey harm both the land and peoples health.CThey can help produce ri

8、ch soil.DThey are not expensive.( )2What concerns many people about the use of pesticides? APesticides can damage the land.BChemicals can stay in the soil for a long time.CPesticides can kill harmful bacteria and insects.DChemicals may make people ill and even cause cancer.( )3Why do organic farmers

9、 change the kind of crop grown in each field every few years? AIt helps put important minerals back into the ground.BIt can avoid damage to the environment.CIt can help increase output.DThe writer didnt tell us.( )4Why cant we stop the use of man-made chemicals in agriculture entirely? AOrganic farm

10、ing costs us a lot of money.BOrganic farming can meet peoples need.CChemical farming brought us huge profit.DChemical farming helps serve the need for food.What is your opinion on chemical or organic farming?Discussion Argumentative Structure:1.Topic (your idea)2.Supporting evidence3.Conclusion 1Gro

11、wing rice under high carbon dioxide conditions may _Aincrease iron in the rice Bmake it less nutritiousCcause losses of vitamin E Dmake it more delicious解析：解析：细节理解题。根据第二段中的细节理解题。根据第二段中的“Rice grown under high carbon dioxide conditions had，on average，13 to 30 percent lower levels.less protein.”可知，可知，B

12、项为正确答案。项为正确答案。A、C、D三项的表述均与原文表述不符。三项的表述均与原文表述不符。答案：答案：B2How can people reduce the nutritional harm of climate change?ABy importing rice from China and Japan. BBy taking other kinds of food instead of rice.CBy avoiding eating rice from Southeast Asia.DBy growing rice suitable for the environment.解析：解析

13、：细节理解题。根据文章最后一句细节理解题。根据文章最后一句“That is to grow different forms of rice that can adapt to higher carbon dioxide levels.”可知，可知，D项为正确答案。项为正确答案。 答案：答案：D3Whats the authors purpose of writing the text?ATo inform readers what nutrients food crops contain.BTo call on people to care for the planet they live o

14、n.CTo share the results of some studies on peoples diets.DTo tell readers where food crops are mainly produced.解析：解析：写作意图题。通读全文可知，本文通过介绍温室写作意图题。通读全文可知，本文通过介绍温室气体增加对粮食作物的影响来唤起人们对人类赖以生存气体增加对粮食作物的影响来唤起人们对人类赖以生存的地球家园的保护，故选的地球家园的保护，故选B。 答案：答案：B4In which part of a magazine can you read the text?AAdvertisements.BArt and culture.CScience reports. DBusiness news.解析：解析：文章出处题。通读全文，尤其是文中的文章出处题。通读全文，尤其是文中的“study”“Researchers”“studies”等可推知，本文是一篇等可推知，本文是一篇研究报道，在杂志的科学报道部分能读到本文。研究报道，在杂志的科学报道部分能读到本文。 答案：答案：C