Unit 5 Using Language Writing 导学案-高中英语人教版（2019）选择性必修第一册

IUnit5WorkingtheLandwriting班级姓名小组一、明确目标（2mins）学习目标1.Tounderstandthemeaningsanddifferencesbetweenchemicalandorganicfarmingandtheiradvantagesanddisadvantages;2.Tomastersometransitionalwordsorphrasesinthetext;3.Tolearnaboutthestructureofargumentativeessay;4.Towriteanessaytoexpressyourviewsonchemicalfarmingvsorganicfarming.独立学习(15mins)Readthepassageon56andfinishthefollowingtasks.Task1:Trytoanswerthefollowingquestions.(5mins)1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?2.Whatconcernsmanypeopleabouttheuseofpesticides?

3.Whatisoneproblemwiththeuseofchemicalfertilisers?4.Howisorganicfarmingdifferentfromchemicalfarming?

5.Whydoorganicfarmerschangethekindofcropgrowninafieldeveryyear?6.Whatisthegoalofusingorganicfarmingmethods?Doyouthinkitcanbereached?Whyorwhynot?Keys:1.Manyfarmerswelcomedthemasagreatwaytofightcropdiseasesandincreaseproduction.2.Theirlong-termusecansometimesharmboththelandandpeople’shealth.3.Cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.4.Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasesthroughnaturalmeans.5.Differentcropsaregrownbecausetheyputimportantmineralsbackintothegroundmakingitreadyforthenextbatchofcrops.6.Thegoalofusingorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople'shealth.Yes,Ithinkthisgoalcanbereachedbecausepeopletendtoliveagreenandhealthylifeandtheyneedorganicfarmingtodevelop.

三、同伴互助(5mins)Task:Ingroups,findtheadvantagesanddisadvantagesofchemicalfarmingtheauthorlisted.(para1para2)四、激情展示(5mins)Volunteersmakeapresentationreasonablywhileotherstudentsaresupposedtolistencarefully.Raisequestionsandtakenotestimely.___________________________________________________________________________________总结提升(3mins)AdvantagesofOrganicFarmingComparedtochemicalfarming,organicfarmingenjoysitsoverwhelmingsuperiority.Thereasonsareasfollows.Firstly,organicfoodishealthierandsaferasinorganicfarming,poisonouschemicalslikepesticidesareforbiddenfrombeingusedoncrops.Furthermore,organicfarmingisenvironmentallyfriendly.Forinstance,organicfarmersusenaturalwastefromanimalsasfertilizer,whichisharmlesstotheenvironment.Lastly,farmerscanincreasetheirincomethroughorganicfarming.Aspeopletendtopursueagreenlife,theyaremorelikelytobuyorganicfruitandvegetablesdespitethehighprices.Withincomparableadvantages,therefore,organicfarmingisexpectedtobenefitmorepeopleinthefuture.达标测评(10mins)P1______________________________________(化学农药和人工肥料)havebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthemasagreatwayto_________________________________________(抵御作物病害、增加产量).Overtime,however,whatsomescientistshavefoundisthat____________________________________________________________________(它们的长期使用有时会危害土地和人类健康).Keys:Chemicalpesticidesandartificialfertilizers;Chemicalpesticidesandartificialfertilizers;theirlong-termusecansometimesharmboththelandandpeople’shealthP2Forexample,pesticidescandamagethelandby__________________________________________________________________(不仅杀死有害细菌和昆虫，还杀死那些有益的).Inaddition,thesechemicalscanstayinthe____________________（土壤和地下水源中）foralongtime.Thisaffectsthecropsgrownonthelandand,_____________，（相应地）theanimalsandhumanswho________________________(消化这些作物).Manypeopleworrythatthesechemicalsmay____________(致病)andeven_____________(引发癌症).Infact,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.Asforchemicalfertilizers,cropsgrownwiththemusually____________________________(生长过快而营养不足).Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthan______________(必需矿物质),andtheyoften____________(口感较差)aswell.Keys:killingnotonlyharmfulbacteriaandinsects,butalsohelpones;soilandundergroundwatersources;inturn;digestthem;makethemill;causecancer;growtoofasttoberichinnutrition;essentialminerals;havelessflavorP3_________________(作为一种替代方法),somefarmershaveswitchedto_____________(有机耕作),andmanycustomershaveturnedto__________(有机食品)whentheyshopatthelocalgrocery.Organicfarmingissimplyfarming___________________________(不使用任何化学品).Organicfarmersfocuson___________________(使土壤保持肥沃）and__________________(没有病害)through___________(自然的方法）.Forexample,manyorganicfarmersuse________________（天然的牲畜粪便）asfertilizer.Thismakesthesoilintheirfields_____________________________(更富含矿物质).Italsokeepstheair,soil,water,andcropsfreeofchemicals.Keys:Asanalternative;Asanalternative;organicfood;withoutusinganychemicals;keepingtheirsoilrich;freeofdisease;naturalmeans;naturalwastefromanimals;richerinmineralsP4Organicfarmersalsousemanyothermethodstoproduce_____________（肥沃的土壤）.Theyoften_____________________________________________(每年更换每块农田种植的作物种类).Forinstance,theymay_______________（种植玉米或小麦）inafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrownisbecausethey__________________________（把重要的矿物质重新放回土壤）,makingitreadyforthenextbatchofcrops.Organicfarmersalso____________（种植多样化的庄稼）thatusedifferentdepthofsoiltohelpkeepitrich.Forexample,peanuts_____________（长在地表）,butmanyothervegetables_______________（扎根于土壤深）.Thegoalofusingdifferentorganicfarmingmethodsisto________________________________________________(生产优质食物，同时避免损害环境和人类健康).Keys:richsoil;changethekindofcropgrownineachfieldeveryyear;growcornorwheat;putimportantmineralsbackintotheground;plantdiversecropsthatusedifferent;growontheground’ssurface;putdowndeeproots;growgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.P5Somepeoplewouldprefertostoptheuseofman-madechemicalsinagricultureentirely.Whatkeepsthemfromdoingsoisthefactthatchemicalfarming____________________________(满足对食物的高要求)aroundtheworld.Organicfarmingisnowherenearabletomeetthatneed.Therefore,_____________________________________（想要找到一个合适的解决方案仍然还有很长的路走）thatputssufficientfoodonthedinnertable_____________________________________________（同时让人和环境尽可能的保持健康).Keys:servesthehighdemandforfood;thereisstill