,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit 2,Working the land,Using language,Unit 2,Words preview,chemical,production,bacteria,pest,nutrition,mineral,discovery,adj.,化学的,;,关于化学的,n.,生产,;,制造,n.,细菌,n.,害虫,;,害兽,;,害鸟,n.,营养,;,滋养,;,食物,n.,矿物,;,矿石,n.,发现,;,发觉,Words previewchemicaladj.化学的;,focus,soil,reduce,root,skim,underline,summary,comment,n.,焦点,;,中心点,vt.,集中,;,聚焦,n.,土壤,vt.,减少,;,减缩,n.,根,;,根源,vt.,浏览,;,略读,vt.,画底线标出,;,强调,n.,总结,;,摘要,;,概要,n.,评论,;,议论,vi.&vt.,表达意见,;,做出评论,focusn.焦点;中心点,Expressions preview,build up,lead to,focus on,keep free,from/of,逐渐增强,;,建立,;,开发,导致,;,造成,(,后果,),集中,(,注意力,精力等,),于,使,免受,(,影响,伤害等,),；,使,不含,(,有害物,),Expressions preview build up逐,It is fertilizer.,What is the substance we put on the,soil to make crops grow?,It is fertilizer.What is the,How many kinds of fertilizers do farmers use?,Two kinds.They are chemical,fertilizers and natural ones.,How many kinds of fertilizers,Organic Farming,Organic Farming,chemical fertilizer,cow dung,用化学肥料和有机肥料的区别,:,chemical fertilizer cow dung用化,Reading,CHEMICAL OR ORGANIC FARMING?,ReadingCHEMICAL OR ORGANIC FAR,B.,Long-term use of chemical fertilizers can,cause damage to the land and peoples health.,A.,Problems caused by chemical fertilizers.,The main,idea of each paragraph,P1,.,P2,.,D.,Farmers and customers turn to organic,farming.,C.,Other methods to keep the soil fertile.,P3.,P4,.,B.Long-term use of chemical fe,Chemical,farming,stop crop,disease,increase,production,damage the,land,by,killing,affect,crops,by,staying,lead to cancer,/illnesses,by,building,up,have,less,nutrition,by growing,too fast,Careful Reading,Chemical farmingstop crop dama,Organic,farming,use natural waste,make,the,soil,rich,in minerals,change,the,crop,put minerals back,into soil,making,plant crops with,different roots,use different levels,of land,plant,grass between crops,preventfrom,a natural fertilizer,Organic farminguse natural wa,1.Which statement is WRONG,according to the text?,A.All crops are organic.,B.Recently,the term“organic farming”,has gained another meaning.,C.All farmers use fertilizers.,D.Scientists believe some chemical,fertilizers are better for people.,Choose the best answer.,D,1.Which statement is WRONGCho,2.Which is not the reason why organic,farmers prefer natural waste from,animals?,A.It can keep the food free from,chemicals.,B.It can keep the air,soil and water,free from chemicals.,C.It can kill harmful pests.,D.It can make the soil richer in,mineral.,C,2.Which is not the reason why,3.What is the advantage of using,chemical fertilizers?,A.Leaving chemicals in the ground,for a long time is good for water supply.,B.They can get the soil exhausted.,C.They can kill helpful bacteria.,D.They can kill harmful pest.,D,3.What is the advantage of us,4.The organic farmers do the followings,except _.,A.adding fertilizers which is rich in mineral,B.changing crops every two or three years,C.planting seeds in different layers of the soil,D.planting grass between crops to prevent,the soil from being blown away,A,4.The organic farmers do the,1.These chemicals in the food supply,build up,in peoples bodies over time.,build,up,增强,;,建立,;,开发,Hard working conditions,build up,character.,艰苦的工作条件能磨练人的性格。,Language Points,1.These chemicals in the food,2.Many of these chemicals can,lead,to,cancer or other illnesses.,lead,to,:,导致,;,造成,Too much work and too little rest,often,lead,to,illness.,过量的工作和过少的休息会引起疾病。,All roads,lead,to,Rome.,条条大道通罗马。,2.Many of these chemicals can,3.They,focus,on,keeping their soil rich,and free of disease.,focus,on,:,集中,(,注意力,精力等,),于,You should,focus,your attention,on,your work.,把注意力集中在你的工作上。,Olympus:,Focus,on,life.,奥林巴斯,:,瞄准生活。,3.They focus on keeping their,4.,reduce,v.,减少,降低,e.g.,公司尽力通过减少花销来提高利润。,The company tries to increase profits by,_.,今年我们已经减少了业务开支。,We _ expenses this year.,reducing,costs,have,reduced,4.reduce v.减少,降低red,5.This also,keeps,the air,soil,water and,crops,free,from,chemicals.,keeps free from/of:,使,免受,(,影响,伤害等,);,使不含,(,有害物,),We put our books in bookcase to,keep,them free,from,dust.,You must take care to,keep,the wound,free,from,the dirt.,5.This also keeps the air,so,拓展,1)keep,from:,隐瞒,不把,告诉,(,某人,),阻止,避免”,如：,He wont be able to,keep,the truth,from,his,father.,You cant,keep,him,from,doing that thing.,2)free,from:,使解除,使摆脱,如：,They aim to,free,the students,from,too,much homework.,3)be free,of,sb/sth:,摆脱某人,/,某物,Im,free,of,that job at last.,拓展,Expressions,1.,化肥,2.,对,造成损害,3.,洗掉某物,4.,导致,;,造成,(,后果,);,通往,5.,逐渐增强,建立,6.,另外,(,还有,),7.,使,免受,(,影响,);,8.,集中,(,注意力、精力,),于,9.,每隔几年,10.,避免做,chemical fertilizer