高中英语人教版 (2019)选择性必修 第一册Unit 5 Working the Land教学ppt课件

这是一份高中英语人教版 (2019)选择性必修 第一册Unit 5 Working the Land教学ppt课件，文件包含Part1pptx、Part2pptx等2份课件配套教学资源，其中PPT共120页， 欢迎下载使用。

1.主题语境:人与社会——评估化学耕作和有机耕作2.语篇类型:说明文3.课文内容分析 本文介绍了化学耕作和有机耕作两种耕作方式的特点,分析了各自的优缺点,最后的结论是人类如果想要既吃得饱又吃得健康,同时保持环境的可持续发展,还有很长的路要走。阅读本文,可以启发学生从多角度思考农业耕作的方式,辩证地看待化学耕作和有机耕作的问题。
1.It is celebrated in mre than 150 cuntries,raising awareness and knwledge f the prblems and causes behind wrld hunger and pverty. (教材第54页) 它在150多个国家举行庆祝活动,提高人们对世界饥饿和贫困背后的问题和原因的 认识和了解。
◆pverty n.贫穷;贫困Happily,this village has risen abve the pverty line.令人高兴的是,这个村已经脱离了贫困线。
[备用例句]There is a disappinting pverty f creativity in their wrk.他们的工作缺乏创造力,令人失望。
单句语法填空①He was shcked by the 　　 　　(pr)he saw arund him. ②The pr man 　　　　 pverty sleeps n the flr at the drway. ③The prgramme fr the evening party was 　　 　　 (pr) rganised. 翻译句子④这个国家三分之一的人口生活在贫困线或以下。　　　 　.　　 .
A third f the ppulatin in this cuntry is living at r belw the pverty line.
2.This affects the crps grwn n the land and,in turn,the animals and humans wh digest them.(教材第55页) 这会影响土里种植的作物,继而影响消化这些作物的人畜。
◆in turn 相应地;转而;依次;轮流Each f us in turn had t be asked the same questin by her.我们每个人都得依次被她问同样的问题。When my mther was ill,my brther and I tk care f her in turn.母亲生病时,我和兄弟轮流看护她。Increased prductin will,in turn,lead t increased prfits.增加生产会继而增加利润。
单句语法填空①There were cheers fr each f the wmen as they spke 　　　　 turn. ②Nw that we have finished the design,it is their turn 　 　. (cnstruct).③At the meeting we tk turns 　 　 (put) frward a number f suggestins.④The tw daughters lked after their sick mther 　　　　 turns. 完成句子⑤他们轮流照顾他的妹妹。 They 　　　　 　　　　 　　　 　 attending his little sister. ⑥轮到你来擦窗户了。　 　　　 　　　　 　　　　 t clean the windws. 
3.They may lk beautiful n the utside,but inside there is usually mre water than essential minerals,and they ften have less flavur as well. (教材第55页) 此类作物外表靓丽,而内里却经常是水分多于必需矿物质,并且往往口感较差。
◆essential adj.完全必要的;极其重要的Even in small cmpanies,cmputers are an essential tl.即使在小公司里,计算机也是必不可少的工具。It’s essential fr yu t make the right decisins at the very start.重要的是你从一开始就要做出正确的决定。
[备用例句]①The wrds are essential fr everybdy t learn English. 这些词对于每一个英语学习者来说,都是必备的。②It is essential that yu get a visa befre yu travel abrad. 到国外旅游之前拿到签证是必不可少的。
单句语法填空①Sun and water are essential 　　　　 the grwth f crps. ②It is essential fr us 　　　 　 (set) ur gal realistically. ③It is essential that he 　　 　　 (learn) Chinese histry. 翻译句子④有必要采取有效的措施来保障我们公民的权利。　　　　 .　 .
(shuld) learn
It is essential that effective measures(shuld) be taken t prtect ur civil rights.
4.As an alternative,sme farmers have switched t rganic farming... (教材第55页) 作为一种替代方法,有些农民已经转向有机耕作……
◆alternative n.可供选择的事物 adj.可供替代的;非传统的We are very sad t have t d this,but there is n ther alternative.我们为不得不这么做而感到难过,但是现在没有别的选择。We have n alternative but t fire Tm.除了解雇汤姆,我们别无选择。There were alternative methds f travel available.有其他的旅行方式可供选择。
[备用例句]There are alternative surces f nutritin t animal meat.有能替代动物肉类的其他营养来源。
温馨提示①“别无选择只好做……”的其他表达形式还有:have n chice but t d sth.; can’t d sth.but d sth.; can d nthing but d sth.等。在这些结构中, 若but之前出现实义动词d的某种形式,but之后要用省略t的不定式,否则,but之 后的t不能省略。②在短语an alternative t中,t为介词。
单句语法填空①　　 　 　 (alternative),he may sell prducts t an exprt cmpany.②The sldier had n alternative but 　　　 　 (bey) rders. ③If yu dn’t like the schl lunch,yu have the alternative f 　　 　　 (bring) yur wn. ④Fruit is a healthy alternative 　　　　 chclate. 完成句子⑤The criminal 　　 　　 　　 　　 　　　　 (除……别无选择) t tell the truth f his crime. 
Alternatively
alternative/chice
5.Organic farmers als plant diverse crps that use different depths f sil t help keep it rich.(教材第56页) 有机耕作的农民也种植土壤深度要求不同的多样性作物,以保持土壤肥沃。
◆depth n.向下(或向里)的距离;深(度)What’s the depth f the water here?这儿的水有多深?We will discuss these three areas in depth.我们将深入探讨这3个领域。[备用例句]I didn’t g in depth int the matter with him.这个问题我没同他深谈。
温馨提示:要注意以下量词的词形变化:
单句语法填空①Plant the beans 　　　　 a depth f abut six inches. ②This is a new subject and needs t be explred 　　　　 depth. ③I was in the 　　　　 (deep) f despair when the baby was sick. 完成句子④我相信,大多数开发者在内心深处都想当英雄。　　　 　 　　　　,I believe mst develpers want t be the her. 
1.As fr chemical fertilisers,crps grwn with them usually grw t fast t be rich in nutritin.(教材第55页) 至于化学肥料,用其施肥的作物通常生长过快而营养不足。
◆句中的t fast t be rich in nutritin为结构。意为“太……而不能……”,表示否定含义。Nthing is t small t celebrate.(2020全国Ⅰ卷,七选五)小事再小也值得庆祝。We can’t be t careful t d ur hmewrk.我们做作业时越细心越好。The little by is t shy t speak t her.小男孩太害羞,不敢和她讲话。
She is t yung t knw right frm wrng.她太小,还分不清是非。
温馨提示有时也表示肯定意义:①t后跟anxius、eager、glad、happy、pleased、ready、willing等表示心情、 心理活动状态或心理倾向的形容词时;②t前有but、nly、all等词对其进行修饰时;③否定词nt、never等用在t前时。
翻译句子①汤姆个头太矮了,够不着桌子上的苹果。　　　 　.②他急于知道考试结果。　　 　.③我能找到人聊聊天,太高兴了。 　　 　.句型转换④She was s excited that she culdn’t say a wrd when she heard the news. →She 　　　 　　 　 　　 　　 t say a wrd when she heard the news.
Tm is t shrt t reach the apples n the table.
He is t eager t knw the result f the examinatin.
I am nly t happy t have smene t speak t.
2.Why different crps are grwn is because they put imprtant minerals back int the grund,making it ready again fr the next batch f crps. (教材第56页) 种植不同作物的原因,是为了把重要的矿物质重新放回土壤之中,让土壤为下一批 作物(的种植)做好准备。
◆句中making it...为现在分词短语作结果状语,表示前面的情况所造成的结果,making的逻辑主语为前面的整个句子,所表示的是谓语动词的直接结果,是意料中的结果。Many peple mved t New Yrk,making it the largest city in the USA.很多人去了纽约,使之成为美国最大的城市。The car was caught in a traffic jam,thus causing the delay.这辆车遇到了交通堵塞,结果晚点了。
[备用例句]①A hearty laugh relieves physical tensin,leaving yur muscles relaxed fr ver half an hur. 开怀大笑缓解身体紧张,让你的肌肉放松超过半个小时。②The child slipped and fell,hitting his head against the dr. 那孩子滑了一跤,头撞到了门上。
温馨提示动词不定式也可作结果状语,但它通常表示一种“偶然的;出人意料的”结果,有时为了强调这种意外的结果,可在不定式前面加nly,译为“(结果)却……;只(只是)……”。
完成句子①I hurried t his huse,　　 　　 　　 　　 　　 　　 　　　　 　　　　. (结果却发现他不在家). ②He fell ff the bike,　　　 　 　　　　 　　　　 　　　 　 　　 　. 　　　　 　　 　　 (头撞到了一块大石头上). ③Mre highways have been built in China,　　 　 　　 　 　　 　　 　. (使更容易) fr peple t travel frm ne place t anther. 
句型转换④His parents died early and left him an rphan. →His parents died early,　　 　　 　　　　 　　　　 　　　 　. ⑤The snw lasted a week,which resulted in a serius traffic cnfusin in the whle area. →The snw lasted a week, 　 　 　 　　 　 　　 　 　　 　. 　 　 　　 　 　　　　　 　 　　　 　　 　　 　　　 　. 
What keeps them frm ding s is the fact that chemical farming serves the high demand fr fd arund the wrld.(教材第56页)他们不能如愿的原因是化学耕作满足了全世界对食物的高需求。◆句中What keeps them frm ding s为what引导的主语从句,that chemical the wrld是that引导的同位语从句。
单句情境写作1.昨天发生严重事故的原因是他开车太快。      
What caused the serius accident yesterday was the fact that he was driving t fast.
2.但是我发现最令我感动的却是,他们把做这些都当作理所当然的。     
But what I fund mst tuching was the fact that they all did it as a matter f curse.
3.最让我不安的是她撒了谎。   
What upsets me mst is the fact that she tld a lie.
What ther imprtant aspects f agriculture d yu want t knw abut? (教材第58页) 你还想了解农业的哪些重要方面?◆aspect n.方面;层面;朝向;方位This was ne aspect f her character he hadn’t seen befre.这是他过去没有了解到的她性格的一个方面。Students may pursue research in any aspect f cmputatinal linguistics.学生可以就计算语言学的任何一个方面展开研究。He has made prgress in every aspect.他在各方面都有起色。The huse has a suth-west aspect.房子为西南朝向。
单句语法填空①He shwed us every 　　　 　 (aspect) f the game that we had never seen befre. ②The relatins between ur tw cuntries have imprved markedly 　 　　. every aspect. ③Have yu thught abut the prblem 　　　 　 every aspect? 翻译句子④他对这里工作的各方面都感兴趣。　　　　 .
He was interested in all aspects f the wrk here.
Write an argumentative essay n frming
1.文本类型:辩论型文章。2.要点内容: ①化学种植和有机种植的不同种植方法; ②化学种植和有机种植对环境的不同影响。
1.表达观点型文章常用词组:
have a psitive attitude 有一个积极的态度draw a cnclusin 得出结论cntribute t yur health 有助于你的身体健康put frward a suggestin 提出建议d harm t peple’s health 伤害人们的健康cause a lt f diseases 导致很多疾病a waste f mney 浪费钱give up smking 戒烟take my advice int cnsideratin 考虑我的建议stay away frm junk fd 远离垃圾食品
2.表达观点型文章首段常用句式:
I’m srry t hear/learn that...听说……我很难过In my pinin,it is wrng t/that...在我看来,……是错误的I dn’t think it is a very gd way t...我认为……不是一个很好的方法Thank yu fr yur letter asking me abut...谢谢你来信询问我有关……I’m writing t persuade yu t quit/give up...我写信是劝你放弃……
3.表达观点型文章中段常用句式:
Here are my reasns.First f all,I think it wuld be better if...我的理由如下。首先,我认为如果……会更好The reasns as fllws.First,, but nt least,...……的原因如下。首先,…… 第二,…… 最后但同样重要的是,……On the ne hand...,n the ther hand...一方面……,另一方面……N ne can ignre the fact that...没有人能忽视……的事实If I were yu,I wuld...如果我是你,我会……
In shrt/In cnclusin/In clsing...总之……All things cnsidered...从各方面看来……As far as I’m cncerned,...就我而言,……Frm what has been discussed abve,...通过以上讨论,……Please take my advice int cnsideratin and make a final decisin.请考虑我的建议,做出最后的决定。
4.表达观点型文章尾段常用句式:
假设你是李华,最近,你班开展了主题为“Chemical Farming r Organic Farming”的征文活动。请写一篇你支持开展有机农业的英语文章,发表在学校校报的英语专版上。 1.化学农业的危害; 2.有机农业的优点及理由; 3.根据自己掌握的相关知识,批判性地发表自己的观点。
1.　　　　　　　　　 n.不足;缺少;短缺 2.　　　　　　　　vt.(通常经过努力)获得;得到 3.　　　　　　　　adj.传统的;习惯的 4.　　　　　　　　adj.热切的;十分强烈 的;激烈的5.　　　　　　　　vt.产生;引起 6.　　　　　　　  在内心深处;本质上;实际上7.　　　　　　　　n.泥土;土壤;国土;领土 8.　　　　　　　　adj.与化学有关的;化学的 n.化学制品;化学品 9.　　　　　　　　n.味道;特点;特色 10.　　　　　　　　n.肥料 11.　　　　　　　　adj.有营养的;营养丰富的 12.　　　　　　　　adj.有机的;不使用化肥的;有机物的 13.　　　　　　　　adv.全部地;完整地;完全地 
Ⅱ.巧用单元句式、语法翻译句子1.最近我们班就化学农业和有机农业举行了一场激烈的讨论。
2.在我看来,我们应该提倡有机农业。
Recently ur class held an intense discussin n chemical agriculture and rganic agriculture.
In my pinin,we shuld advcate rganic agriculture.
3.化学农业存在着诸多不足。它通常是通过在深层使用大量的化学肥料来实现。
There are many shrtages existing in chemical agriculture. It is ften attained by using lts f chemical fertilisers deep dwn.
Organic farming invlves n chemicals and it benefits bth ur health and the envirnment.
4.残留在作物内部的化学物质很难被洗掉,这往往会导致癌症或其他疾病。
5.而且,用传统化学方法生产的食物味道不好。
The chemicals staying inside the crps are hard t be washed ff,which ften causes cancer r ther illnesses.
Als,fd that is prduced in the cnventinal chemical way tastes bad.
6.有机农业不涉及化学品,对我们的健康和环境都有利。
7.更重要的是,有机种植的农民使用完全自然的方法来保持土壤肥沃,作物以健康的 方式生长。
Mre imprtantly,rganic farmers use entirely natural means t keep the sil rich and crps grw in a healthy way.
8.农作物、蔬菜和水果味道更好,也更有营养。
The crps,vegetables and fruits have a better flavur and are mre nutritius.
9.俗话说,健康是第一财富,所以选择有机食品是更明智的。
As a saying ges,health is the first wealth,s it is wiser t chse rganic fd.
1.用what引导的主语从句升级第2句。
In my pinin,what ur sciety needs is t advcate rganic agriculture.
2.用which引导的定语从句升级第3句。
There are many shrtages existing in chemical agriculture,which is ften attained by using lts f chemical fertilisers deep dwn.
3.用现在分词作结果状语升级第4句。
The chemicals staying inside the crps are hard t be washed ff,ften causing cancer r ther illnesses.
4.用过去分词作定语简化第5句。
Als,fd prduced in the cnventinal chemical way tastes bad.
5.用现在分词作伴随状语升级第6句。
Organic farming invlves n chemicals,benefiting bth ur health and the envirnment.
6.将第7句和第8句合并为一个句子,使之更加有条理。
Organic farmers use entirely natural means t keep the sil rich and crps grw in a healthy way,s the crps,vegetables and fruits have a better flavur and are mre nutritius.
Recently ur class held an intense discussin n chemical agriculture and rganic agriculture.In my pinin,what ur sciety needs is t advcate rganic agriculture.The fllwing are my reasns. On ne hand,there are many shrtages existing in chemical agriculture,which is ften attained by using lts f chemical fertilisers deep dwn.The chemicals staying inside the crps are hard t be washed ff,ften causing cancer r ther illnesses.Als,fd prduced in the cnventinal chemical way tastes bad.On the ther hand,rganic farming invlves n chemicals,benefiting bth ur health and the envirnment.Mre imprtantly,rganic farmers use entirely natural means t keep the sil rich and crps grw in a healthy way,s the crps,vegetables and fruits have a better flavur and are mre nutritius. As a saying ges,health is the first wealth,s it is wiser t chse rganic fd.
假设你是李华,你所在的中学正面向学生征集意见,询问学生是否赞成开设线上课堂(nline classrms)。请给校长写一封电子邮件,表达你赞同开设线上课堂的观点。要点如下: 1.网上教学资源丰富; 2.提高课堂效率; 3.线上课堂利于环保; 4.其他理由。 注意: 1.写作词数应为80左右; 2.可以适当增加细节,以使行文连贯; 3.开头、结尾已给出,不计入总词数。
Dear Headmaster,
Yurs sincerely,Li Hua
One pssible versin:Dear Headmaster, We have been asked abut ur pinins n pening nline classrms.I am in favur f this plan fr the fllwing reasns. T begin with,everyne learns differently.Students can custmise their smart devices with materials that fit their level and learning style.Mrever,when cnnected t the Internet,students can interact with teachers frm all ver the wrld and enjy tns f useful materials,which bviusly will enable them t learn mre efficiently.Fr the sake f envirnmental prtectin,pening nline classrms is a gd way t save trees that we have been cutting dwn fr paper.Mst imprtantly,I believe students will develp their interests by enjying a new way f learning. I hpe yu wuld take my ideas int cnsideratin.Yurs sincerely,Li Hua
Ⅰ.语境填词1.My 　 　　　 (digest) is terrible and nw I think I have t g t see a dctr. 2.In an ideal wrld there wuld be n 　　　 　 (pr) and disease. 3.The 　　 　　 (deep) f the well is arund 6 metres. 4.We shall see that this is nt 　　　 　 (entire) true. 5.　　　 　 instance,gas statins,cafes are allwed t keep perating n Sundays. 
6.D yu knw hw much yu spend n clthes and 　　 　　 (grcery) annually? 7.We will discuss each f these items 　　　　 turn. 8.He had strayed frm the path f 　　　 　(cnventin) is imprtant t intrduce children t healthy 　 　 .　　 (nutritin) fds frm when they begin t eat slids. 10.Sme f these 　　　 　 (bacterium) are actually gd fr yu. 
Ⅱ.单句情境写作1.出口的下降反过来又减少了国内的支出。(in turn)
Falling exprts have,in turn,decreased dmestic spending.
2.例如,如果你发现有人偷东西,你会怎么做?(fr instance)
What wuld yu d,fr instance,if yu fund smene stealing?
3.我们的价格保持竞争力是至关重要的。(essential)
It is essential that ur prices remain cmpetitive.
4.作为备选方案,可以执行以下步骤。(alternative)
As an alternative,the fllwing steps can be perfrmed.
5.农民们采取措施使他们的庄稼免受病害。(free frm)
The farmers take measures t keep their crps free frm disease.
6.这跟我要找的颜色差远了。(nwhere near)
It’s nwhere near the clur I’m lking fr.
阅读A The fd we eat seems t have a great effect n ur health.Althugh science has made big steps in making fd mre fit t eat,it has,at the same time,made many fds unfit t eat.Sme research has shwn that perhaps eighty percent f human illness is related t fd and frty percent f cancer is related t fd as well.That fd is related t illness is nt a new discvery.In 1945,sme researchers realised that things cmmnly used t keep clurs in meats and ther fd additives (添加剂) caused cancer.
Yet,these additives remain in ur fd,and it is difficult t knw which things n the wrappings(包装) f fds are helpful r harmful.The additives which we eat are nt all s direct.Farmers ften give penicillin t their animals,and because f this,penicillin has been fund in the milk f cws.Smetimes similar things are supplied t animals nt fr their health,but just t make a prfit. The farmers are simply trying t fatten the animals in rder t get a higher price n the market.Althugh sme cuntries have tried t cntrl such things,the practice cntinues.语篇导读:本文是一篇说明文。文章主要介绍的是食物虽然可以让我们生存,但是现在的很多疾病也是与食物有关的,所以我们要特别注意自己的饮食健康。阅读本文有利于培养学生养成健康的生活方式。
1.Accrding t this passage,we can knw 　　　.  A.perhaps mst f human illness is caused by what we eat B.perhaps mst kinds f cancer are related t what peple eat C.cancer was discvered in 1945 D.science has made fd unfit t eat
1.A　细节理解题。考查学生识别和理解文本中具体信息的能力。根据文章第一段中的“Sme research has related t fd as well.”可知,也许大多数的人类疾病是由我们的饮食引起的。故选A。
2.Things that are used t keep clurs in meats are 　　　.  A.harmfulB.useless C.helplessD.dangerus
2.A　细节理解题。考查学生识别和理解文本中具体信息的能力。根据文章第一段中的“In 1945,sme researchers fd additives(添加剂) caused cancer.”可知,用来保持肉类颜色的东西是有害的。故选A。
3.Peple use additives 　　　.  A.t make fd mre unfit t eat B.t imprve the clur f the fd C.t change the clur f the fd D.t take ff the disease f the fd
3.B　推理判断题。考查学生根据文本信息进行推断归纳的能力。根据文章第一段中的“In 1945,sme researchers realised that things cmmnly used t keep clurs in meats and ther fd additives(添加剂) caused cancer.”可推断,人们往往使用添加剂来改善食物的颜色。故选B。
B At every turn in the Netherlands,the future f sustainable(可持续的) agriculture is taking shape—nt in the meeting rms f big cmpanies but n thusands f mdest family farms. Yu can see it vividly n the farm run by Ted Duijvestijn and his brthers.At the Duijvestijns’ 36-acre greenhuse near the ld city f Delf,visitrs wander amng the deep green tmat plants,which are 20 feet tall.Rted nt in sil but in materials made frm leaves and stalks,the plants are heavy with tmates—15 varieties in all—t suit the taste f the mst demanding custmers.
Since 2004,the Duijvestijns have declared resurce independence n every frnt.The farm prduces all f its wn energy and fertiliser and even sme f the packaging materials necessary fr the crp’s distributin and sale.The grwing envirnment is kept at perfect temperatures year-rund by gethermal heat(地热) that can be fund under at least half f the Netherlands.Only rainwater is used fr irrigatin.Each kilgram f tmates frm their plants requires less than 15 kilgrams f water,cmpared with 61 kilgrams fr plants in pen fields.Once each year the entire crp is regrwn frm seeds,and the ld plants are prcessed t make packaging materials.The few pests that manage t enter the greenhuse are greeted by an army f fierce insects that shws n interest in tmates.The nutritin in the sil can be imprved by grwing plants that wrk with certain bacteria t prduce their wn fertiliser.In shrt,it’s an entirely self-cntained fd system.
“Lk at the island f Bali in Indnesia!” Ted explains.“Fr at least a thusand years,its farmers have raised ducks and fish within the same rice field.It’s irrigated by the canal systems sculpted by human hands alng muntains.They are ur mdel.”语篇导读:本文是一篇说明文。文章主要介绍了荷兰Duijvestijns生态农场的基本情况。阅读本文有利于培养学生关于人与环境、人与动植物和谐共存的意识。
4.What can we learn abut the Duijvestijns’ tmates? A.Their clur is deep green. B.There are 15 n each plant. C.They are very tasty. D.They grw in rich natural sil.
4.C　推理判断题。考查学生根据文本信息进行推断归纳的能力。根据文章第二段中的“Rted nt in sil but in suit the taste f the mst demanding custmers.”可知,Ted Duijvestijns农场生产的西红柿非常美味。故选C。
5.The Duijvestijns,greenhuse 　　　.  A.des nt have insects B.is heated by slar energy C.prduces its wn chemical fertiliser D.cnsumes much less water
5.D　细节理解题。考查学生识别和理解文本中具体信息的能力。根据文章第三段中的“Each kilgram f tmates frm their plants requires less than 15 kilgrams f water,cmpared with 61 kilgrams fr plants in pen fields.”可知,Duijvestijns生态农场耗水量少。故选D。
6.What des the underlined wrd “self-cntained” in Paragraph 3 mean? A.Independent.B.Reliable. C.Satisfying. D.Separated.
6.A　词义猜测题。根据第三段的主题句“Since 2004,the Duijvestijns have declared resurce independence n every frnt.”以及本段的细节内容可推断,该农场完全能自给自足,self-cntained意为“自给自足的”。故选A。
7.Why des Ted mentin the island f Bali? A.He is attracted t its canal systems. B.He will als raise ducks in his farm. C.He wants t see the beautiful island. D.He appreciates its farming methds.
7.D　推理判断题。考查学生根据文本信息进行推断归纳的能力。根据文章最后一段中的“They are ur mdel.”可推断,Ted提到巴厘岛是因为他非常欣赏巴厘岛上的耕作方法。故选D。
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