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1、Words preview chemical chemical production production bacteria bacteria pest pest nutrition nutrition mineral mineral adj.adj.化学的；关于化学的化学的；关于化学的n.n.生产；制造生产；制造n.n.细菌细菌n.n.害虫；害兽；害鸟害虫；害兽；害鸟n.n.营养；滋养；食物营养；滋养；食物n.n.矿物；矿石矿物；矿石第1页/共35页 discovery discovery focus focus soil soil reduce reduce root root n.n.发
2、现；发觉发现；发觉n.n.焦点；中心点焦点；中心点vt.vt.集中；聚焦集中；聚焦n.n.土壤土壤vt.vt.减少；减缩减少；减缩n.n.根；根源根；根源Words preview第2页/共35页 skim skim underline underline summary summary comment comment vt.vt.浏览；略读浏览；略读vt.vt.画底线标出；强调画底线标出；强调n.n.总结；摘要；概要总结；摘要；概要n.n.评论；议论评论；议论vi.&vt.vi.&vt.表达意见表达意见;做出评论做出评论Words preview第3页/共35页Lead inIn this
3、unit we have learnt about a great man,do you still remember who he is?What is his achievement?Can you think of other ways to increase our crop harvest?第4页/共35页chemicalchemical fertilizers fertilizers naturalnatural fertilizersfertilizers第5页/共35页 1.What is organic farming?2.What is the goal of using
4、organic farming methods?Scanning Farming without using chemicals.To grow good food and avoid damaging the environment or peoples health.第6页/共35页Long-term use of chemical fertilizers can cause damage to the land and peoples health.Farmers and customers turn to organic farming.Other methods to keep th
5、e soil fertile.Skimming Problems caused by chemical fertilizersMain ideaMain ideaP1.P2.P3.P4.第7页/共35页Read the text and fill in the blanks.Chemical FarmingAdvantages Stopping crop disease and increase _productionCareful-reading 第8页/共35页Chemical FarmingDisadvantagesDamaging the land:killing the helpfu
6、l _ Damaging peoples health:Many chemicals in the food supply can lead to cancer or other illnesses.Food grows too fast to be full of much _.bacteria and pestsnutrition第9页/共35页Organic farming_To grow good food and avoid damaging the environment or peoples healthGoal第10页/共35页Organic farmingMethods Us
7、ing _ waste from animals as fertilizerChanging _ in each field every few years Using _ of soil to plant crops Planting _ between cropsgrassnaturalthe kind of cropdifferent levels第11页/共35页Change crops every few yearsCorn,wheatPeas soybeansPut the minerals back into the soil,making it rich and healthy
8、Crops that use the surface of the soil(peanuts)Crops that need a deeper level of soil(root vegetable)Make sure that what is left in the ground after harvesting becomes a natural fertilizer for the next years crop第12页/共35页ORGANIC FARMINGStructure of the textI using chemical fertilizers for a long tim
9、e can hurt the land and also peoples healthII Problem caused by chemical fertilizers第13页/共35页1.Damage the land by killing the helpful bacteria and pests as well as the harmful ones2.Lead to cancer or other illness.3.Food grown with chemical fertilizers look beautiful,but inside there is usually more
10、 water than vitamins and minerals.第14页/共35页 Organic farming is becoming more popular with some farmers and many customers after these discoveries came out.IV Other methods to keep the soil fertile.第15页/共35页Expressions 1.1.化肥化肥2.2.对对造成损害造成损害3.3.洗掉某物洗掉某物4.4.导致导致;造成造成(后果后果););通往通往5.5.逐渐增强逐渐增强,建立建立6.6.另
11、外另外(还有还有)7.7.使使免受免受(影响影响););使使不含不含(有害物有害物)8.8.集中集中(注意力、精力注意力、精力)于于9.9.每隔几年每隔几年10.10.避免做避免做chemical fertilizerscause/do damage towash offlead tobulid upin addition(to)keepfree from/offocus onevery few yearsavoid doing第16页/共35页1.supply.1)用作名词时：a)指“供给;供应”等,其反义词为demand(需求)。supply and demand 供与求 be in sh
12、ort supply 供应缺乏,供应不足 food supply 食物供应 water supply 供水第17页/共35页b)当“供应品;生活用品;补给品”等,常用复数supplies。military supplies 军需品 household supplies 家庭用品 medical supplies 医用品第18页/共35页2)用作动词时,指“供给,提供,备办”等,supply sb.(with)sth,supply sth.to /for sb.-They supplied food to/for them.他们供给他食物。-The library is well supplie
13、d with books.图书馆备有充足的书籍。第19页/共35页比较 supply,provide 和 affordsupply向群众、市场、城市、工厂等供应物品。provide 主要指为某人、某物供应物品,尤其指生活必需品。afford 指为一定的目的而提供所需要的东西。第20页/共35页They provided the refugees food and medicine.他们为难民提供食品和药品。These efforts afforded us useful experience.这些努力使我们得到一些有益的经验。All the rooms are _ with electric
14、lights.A.supplied B.given C.offered D.burnt (2005 上海）第21页/共35页即学即练即学即练 用用lead to的适当形式完成句子。的适当形式完成句子。1.Students should always remember that hard work is the main way which _ success.2.The bad weather _ a terrible accident a few days ago.led toleads to2.lead to2.lead to第22页/共35页3.focus用法用法 猜一猜猜一猜 根据语境
15、推断根据语境推断focus在下列在下列句子中的含义句子中的含义,并从并从a-d中找出与每中找出与每句话中的句话中的focus相符合的英文释义。相符合的英文释义。第23页/共35页1.The focus of the meeting changed from population growth to the education of women.2.Bring the object into focus if you want a clear photograph.3.She tried to focus her mind on her work.4.She turned the camera
16、and focused on Martins face.a.the thing,person,situation,etc.that people pay special attention tob.a point or distance at which the outline of an object is clearly seen by the eye or through a lensc.to point a camera at something,and change the controls slightly so that you can see that thing clearl
17、y d.to give special attention to one particular person or thing,or to make people do thisc c a ab bd d第24页/共35页归纳总结归纳总结 focus作名词作名词,意为意为“焦点、焦点、中心点中心点”;作动词作动词,意为意为“集中、聚焦集中、聚焦”,常构成短语常构成短语focus on,意为意为“集中集中(注注意力、精力等意力、精力等)于于”。第25页/共35页4.keep free from “远离”或“避免”keep free from emotional reactions 避免激动的反应
18、 keep free from restrictions 避免受到限制 第26页/共35页1.Crops such as peas or soybeans put important minerals back into the soil,making it ready for crops such as wheat or corn that need rich and fertile soil.第27页/共35页分析 本句结构比较复杂。其主干结构为:主句(Crops put important minerals back into the soil)+状语(making it ready f
19、or crops)。状语中又包含“make+it+形容词”结构和由that引导的定语从句(that need rich and fertile soil)。第28页/共35页2.Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil,and then leaving it in the ground to become a natural fertilizer for the next years crop.分析分析本句的主干结构是
20、一个简单句本句的主干结构是一个简单句,其结构其结构是是:主语主语(farmers)+谓语谓语(prefer)+并并列宾语列宾语(planting.+leaving.)。第29页/共35页其中其中between crops和和in the ground作作地点状语。地点状语。两个宾语后面又分别带有一个不定式两个宾语后面又分别带有一个不定式作目的状语（作目的状语（to prevent wind or water from carrying away the soil和和to become a natural fertilizer for the next years crop）。）。第30页/共3
21、5页Exercises cause/do damage to,wash off,lead to,bulid up,in addition(to),keepfree from/of,focus on,avoid doing1.1.His mistakes _ his failure.2.These chemicals in the food supply_2.These chemicals in the food supply_ in peoples bodies over time.in peoples bodies over time.3.3.4.4.Please _ your mind_
22、the following problem.5.Children should _ violence.led toled tobulid upbulid upfocusfocusononAll roads _ Rome.All roads _ Rome.lead tolead tobe kept free frombe kept free from第31页/共35页cause/do damage to,wash off,lead to,bulid up,in addition(to),keepfree from/of,focus on,avoid doing6.6.He likes baske
23、tball._,he likes football.He likes basketball _football.7.Little Tom stuck to _ the mud _ his shoes by himself before he came in.8.8.I tried to _(meet)him because he always bores me.9.The storm on May 3 _ great _ people in Burma so far.In additionin addition to washingoffavoid meetinghas causeddamag
24、e to第32页/共35页.The whole country was _ by the storm,which had a bad _ on peoples life.A.affected,effect B.effected,affect C.affected,affect D.effected,effected 第33页/共35页Homework 1.Write a summary of the advantages of organic farming and the disadvantages of chemical farming.2.Collect some information about the safety and importance of green food.第34页/共35页感谢您的欣赏！第35页/共35页