人教版必修四unit2reading和练习讲解.pptx

Unit2Workingthelandpre-readingWhat problem do they show?How do you feel when you see the pictures?How much land can be used for farming?1.3/4 of our earth is covered with water!2.1/2 of this piece is too hot,cold,or wet for farming!3.3/4 of this part is used for roads,buildings like houses,schools!4.Only 1/32 of the earth is used for farming!Super hybrid riceTask 1 Scanning Para1 A.Dr Yuans dreams.Para2 B.Dr Yuans personality.Para3 C.Dr Yuans biography.Para4 D.Dr Yuans appearance and his achievement.Para 1 Appearance and Achievement.1.Appearance face:arm:body:sunburntsunburntslim but stronglookslikea_farmerAlthough he is one of Chinas most famous scientists,Yuan Longping considers himself a farmer,for he works the land to do his research.Indeed,his sunburnt face and arms and his slim,strong body are just like those of millions of Chinese farmers,for whom he struggled for the past five decades.Dr Yuan is like more a farmer than a scientist.Para 1 appearance and achievement.1.Appearance face:arm:body:sunburntsunburntslim but stronglookslikea_farmer2.achievementsHe grows what is called_,which makesitpossibleto produce_ more of the crop in the same fields.super hybrid riceone-fifthPara.2HisbiographyTimeinformation19301953As a young manIn a recentharvestnowBorn in Beijing Graduated from collegeHunger was a disturbing problem.search for a way to increase the rice harvest.200 million tons was producedCirculating his knowledge22%7%Means?UN rid the world of hungerThanks to his research,the UN has more tools in the battle to rid the world of hunger.由于他的研究，联合国在消除世界饥饿由于他的研究，联合国在消除世界饥饿的战斗中有了更多的方法的战斗中有了更多的方法Using his hybrid rice,farmers are producing harvests twice as large as before.using 作状语，修饰后面整个句子作状语，修饰后面整个句子Paragraph 3Topic sentence?Dr Yuan is quite satisfied with his life.He doesnt care about _ and _.He likes freedom for his search and hobbies.famemoneyPersonalityPara 4:his dreamsHis first dreamHis second dreamAs tall as sorghum As big as an ear of cornAs huge as a peanutTo export his rice so that it can be grown around the globe.1.himself(as)afarmer认为他自己是个农民认为他自己是个农民2.theland耕种土地，在田间耕作耕种土地，在田间耕作3.doones进行研究进行研究4.faceandarms被太阳晒黑的脸庞和手臂被太阳晒黑的脸庞和手臂5.thepastfive在过去的在过去的50年里年里6.thefirstagriculturalpioneerrice第一个种高产水稻的农业先锋第一个种高产水稻的农业先锋7.ahigh高产量高产量8.graduateSouthwestAgriculturalCollege从西南农学院毕业从西南农学院毕业9.life人生目标人生目标10.thegreatneed对对巨大的需求巨大的需求11.aproblem一个令人烦恼的问题一个令人烦恼的问题12.search寻找寻找13.without_theareaoffields不扩大农田面积不扩大农田面积14.onesknowledge传播知识传播知识15.developedcountries欠发达国家欠发达国家16.幸亏，由于幸亏，由于17.theworldhunger消除（解决）世界饥饿消除（解决）世界饥饿18.harveststwicebefore产量是从前的两倍产量是从前的两倍19.bequite对对.非常满意非常满意20.care喜欢喜欢；照顾；关心；照顾；关心；_littleabout对对很少关心很少关心21.wouldrathersth.宁愿做宁愿做22.spend在在.上花费上花费.23.acomfortablelife过舒适的生活过舒适的生活24.rather而不是而不是25._sb.for使使做好准备，为做好准备，为装备装备26.givehimless_todosth给他更少的自由给他更少的自由27._from从从中醒来中醒来28.thehopeof怀着怀着希望希望29._rice出口大米出口大米30.theglobe全球，全世界全球，全世界31.makeitpossible_使使成为可能成为可能1.As a young man,he saw the great need for increasing the rice output.2.At that time,hunger was a disturbing problem in many parts of the countryside.Whenhewasyoung,heknowhowimportantitwastoproducebiggerricecrops.=itisimportantto=doingsth.isimportant/ofgreatimportanceDuringhisearlyyears,muchofthecountrysidewastroubledbyhunger.=bebadlyinfluenced/affectedbyhaveabadeffecton3.Using his hybrid rice,farmers are producing harvests twice as large as before.4.Spending money on himself or leading a comfortable life also means very little to him.Astheyusehishybridrice,farmersareproducingtwiceasmuchriceasbefore.Heisnotinterestedin/careslittleaboutbuyingthingsforhimselforhavinga5.Just dreaming for things,however,costs nothing.Itdoesntcostanythingtodreamforsomething.A3 B篇What is CA?What are the three principles of CA?How does CA help reduce soil damage?What are the functions of cover crops?What is the rotation of crops?It is meant to keep soil healthy,develop sustainable farming,and prevent the damaging overuse of land.Gaining popularity,CA aims to help famers keep land healthy and productive bybecomepopularControl tillageWhat is tillage?turn over nutrient currentunusableBy avoiding tilling,organic soil matter may actually benefit as crop pieces form a protective surface over the soil.cover crops1.These crops prevent water and soil loss by2.Cover crops also By cycling crops that need different nutrients through the same field,the soil.statistics sunburnt output circulated nationalitystruggled decade regret Therefore nutrition.A)1.根据 2.build up 3.幸亏，由于 4.lead to 5.对感到满意 6.focus on 7.宁愿，宁可 8.keepfree from/of 9.摆脱，除去 10.with the hope ofB)1.with the hope of 2.lead to 3.build up 4.would rather 5.keep free from 6.be focused on 7.was satisfied with 8.According to 9.Thanks to 10.rid of.underlinesummaryexportsbacteriachemicalexpands.productionhungrydisturbingfreedomequipmentoccupationconfusingdiscoverycommentsreduced.morethancaredforasasputbackdoneresearchon1._thepasthalfcentury在过去的半个世纪期间在过去的半个世纪期间2._fertilizers化学肥料化学肥料3._useof的长期使用的长期使用4.cause_to对对造成伤害造成伤害5._off洗掉洗掉6.food_食品供应食品供应7._cancer导致癌症导致癌症8.In_另外，此外另外，此外9.turnto_farming转向有机农业转向有机农业10._on集中集中于于11._soil_disease使土壤免受疾病的影响使土壤免受疾病的影响12.every_每隔几年每隔几年12.make_readyfor使使为做好准备为做好准备13.putdown_扎根扎根14.avoid_避免做某事避免做某事1.Whataresomeoftheproblemscausedbychemicalfertilizers?2.Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition.化肥带来的问题有哪些呢？化肥带来的问题有哪些呢？另外，施过化肥的水果、蔬菜和其他食物另外，施过化肥的水果、蔬菜和其他食物通常生长得过快而营养不足。通常生长得过快而营养不足。过去分词作定语过去分词作定语3.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadingforcropssuchaswheatorcornthatneedrichandfertilesoil.像豌豆或者大豆这样的农作物将重要的矿像豌豆或者大豆这样的农作物将重要的矿物质带回土壤，从而使之适宜于种植要求物质带回土壤，从而使之适宜于种植要求土壤肥沃的农作物比如玉米或者小麦。土壤肥沃的农作物比如玉米或者小麦。现在分词做定语现在分词做定语4.Organicfarmersalsoplantcropstousedifferentlevelsofsoil,forexample,plantingpeanutsthatusethegroundsurfacefollowedbyvegetablesthatputdowndeeproots.有机耕作的农民还种植多种农作物来利用有机耕作的农民还种植多种农作物来利用不同层次的土壤。比如，他们先种植生长不同层次的土壤。比如，他们先种植生长于浅层土壤的花生，然后再种植生根于深于浅层土壤的花生，然后再种植生根于深层土壤的蔬菜。层土壤的蔬菜。过去分词作定语过去分词作定语eacross13.carryon14.buildup1.发生发生2.出现，到场，调大出现，到场，调大3.出发，动身，使爆炸出发，动身，使爆炸4.不因不因受惩罚受惩罚5.砍倒，削减，删节砍倒，削减，删节6.抚养，培养，教育，提出抚养，培养，教育，提出7.是是的原因，解释的原因，解释8.爆发，突发爆发，突发9.与其，不愿与其，不愿10.定居，平静下来，专心于定居，平静下来，专心于11.离开，启程，出发离开，启程，出发12.偶然遇见偶然遇见13.继续，坚持继续，坚持14.逐渐增强，建立，开发逐渐增强，建立，开发Dear Mr.Smith,Im writing to invite you to join us in the English poetry recital competition on July 4.the competition is going to take place on the second floor of the teaching building from 7 p.m.to 9 p.m.,during which time participants will recite their favorite English poems.Those who win the prizes will share their experience in learning English.It would be a great pleasure if you could come and be one of the judges.Im sure we will have a wonderful time together.Looking forward to your reply.Yours sincerely,Li HuaBut Mom refused to give up.“Imsuresheisstillinside,”shesaidasshekickedthedoorwithgreatforceandshoutedinaloudvoice,“Wakeup,Makcik!”Bythen,bothofuswerecoughingbadly.IwastryinghardtopullMomawaywhenthedooropened.Momwasright-Makcikstoodthere,totallyconfused.Therewasnotimetoexplain.MomimmediatelyledMakcikdownstairsandoutsidetoasafespotwherepeoplehadgatheredtowitnessthefire.Realizingtheseriousnessofthesituation,Makcikheldmymothershandstightly,withtearsrollingdownhercheeks.A newspaper reporter came forward and interviewed Mom.MomsaidthatshewasfamiliarwithMakciksdailyroutineandwascertainshewasstillsleepingthen.Whenaskedifshewasscared,Momreplied,”Myneighborwasindanger,sothethoughtoffearnevercrossedmymind.”ThereporterpraisedMomforherbraveandselflessact.Momsetagoodexampletome.Shetaughtmetheimportanceofhelpingothersoutoftrouble.Mymomwasgreat.