必修四unit2 reading 和练习讲解

Unit2Workingtheland

2021/5/91pre-readingWhatproblemdotheyshow?hungerHowdoyoufeelwhenyouseethepictures?Dosomethingtoridtheworldofhunger!2021/5/92Howmuchlandcanbeusedforfarming?3/4ofourearthiscoveredwithwater!2.1/2ofthispieceistoohot,cold,orwetforfarming!3.3/4ofthispartisusedforroads,buildingslikehouses,schools!4.Only1/32oftheearthisusedforfarming!①②③④⑤2021/5/93APioneerForAllPeopleSuperhybridrice2021/5/94Task1Scanning

Para1A.DrYuan’sdreams.Para2B.DrYuan’spersonality.Para3C.DrYuan’sbiography.Para4D.DrYuan’sappearanceandhisachievement.2021/5/95Para1AppearanceandAchievement.Appearanceface:arm:body:sunburntsunburntslimbutstronglookslikea______farmerAlthoughheisoneofChina’smostfamousscientists,YuanLongpingconsidershimselfafarmer,forheworksthelandtodohisresearch.2021/5/96Indeed,hissunburntfaceandarmsandhisslim,strongbodyarejustlikethoseofmillionsofChinesefarmers,forwhomhestruggledforthepastfivedecades.DrYuanislikemoreafarmerthan

ascientist.2021/5/97Para1appearanceandachievement.Appearanceface:arm:body:sunburntsunburntslimbutstronglookslikea______farmer2.achievementsHegrowswhatiscalled_____________,whichmakesitpossibleto

produce_________moreofthecropinthesamefields.superhybridriceone-fifth2021/5/98Para.2HisbiographyTimeinformation19301953AsayoungmanInarecentharvestnowBorninBeijingGraduatedfromcollege

Hungerwasadisturbingproblem.searchforawaytoincreasethericeharvest.

200milliontonswasproduced

Circulatinghisknowledge22%7%Means?UNridtheworldofhunger2021/5/99Thankstohisresearch,theUNhasmoretoolsinthebattletoridtheworldof

hunger.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．Usinghishybridrice,farmersareproducingharveststwiceaslargeasbefore.using作状语，修饰后面整个句子2021/5/910Paragraph3Topicsentence?DrYuanisquitesatisfiedwithhislife.Hedoesn’tcareabout______and_______.Helikesfreedomforhissearchandhobbies.famemoneyPersonality2021/5/9112021/5/912Para4:hisdreamsHisfirstdreamHisseconddream▲Astallassorghum▲

Asbigasanearofcorn▲AshugeasapeanutToexporthisricesothatitcanbegrownaroundtheglobe.2021/5/9131.

himself(as)afarmer认为他自己是个农民2.

theland

耕种土地，在田间耕作3.

doone’s

进行研究

4.

faceandarms

被太阳晒黑的脸庞和手臂5.

thepastfive

在过去的50年里6.

thefirstagriculturalpioneer

rice第一个种高产水稻的农业先锋7.

ahigh

高产量8.graduate

SouthwestAgriculturalCollege

从西南农学院毕业9.life

人生目标10.thegreatneed

对……巨大的需求2021/5/91411.a

problem

一个令人烦恼的问题12.search

寻找13.without_

__theareaoffields不扩大农田面积14.

one’sknowledge

传播知识15.

developedcountries

欠发达国家16.

幸亏，由于17.

theworld

hunger

消除（解决）世界饥饿18.harveststwice

before

产量是从前的两倍19.bequite

对…….非常满意20.care

喜欢；照顾；关心；___littleabout对…很少关心

2021/5/91521.wouldrather

sth.

宁愿做……22.spend…

在...上花费...23.

acomfortablelife

过舒适的生活24.rather

而不是25._______sb.for使…做好准备，为…装备26.givehimless

_todosth给他更少的自由…

27._

_from从…中醒来

28.

thehopeof

怀着……希望29.__rice出口大米30.

theglobe

全球，全世界31.makeitpossible_________…使…成为可能2021/5/916Asayoungman,hesawthegreatneedforincreasingthericeoutput.Atthattime,hungerwasadisturbingprobleminmanypartsofthecountryside.Whenhewasyoung,heknowhowimportantitwastoproducebiggerricecrops.=itisimportantto…=doingsth.isimportant/ofgreatimportanceDuringhisearlyyears,muchofthecountrysidewastroubledbyhunger.=bebadlyinfluenced/affectedbyhaveabadeffecton…2021/5/917Usinghishybridrice,farmersareproducingharveststwiceaslargeasbefore.Spendingmoneyonhimselforleadingacomfortablelifealsomeansverylittletohim.Astheyusehishybridrice,farmersareproducingtwiceasmuchriceasbefore.Heisnotinterestedin/careslittleaboutbuyingthingsforhimselforhavinga…2021/5/918Justdreamingforthings,however,costsnothing.Itdoesn’tcostanythingtodreamforsomething.2021/5/919A3B篇WhatisCA?WhatarethethreeprinciplesofCA?HowdoesCAhelpreducesoildamage?Whatarethefunctionsofcovercrops?Whatistherotationofcrops?2021/5/920Itismeanttokeepsoilhealthy,developsustainablefarming,andpreventthedamagingoveruseofland.Gainingpopularity…,CAaimstohelpfamerskeeplandhealthyandproductiveby…becomepopular2021/5/921ControltillageWhatistillage?turnovernutrientcurrentunusableByavoidingtilling,organicsoilmattermayactuallybenefitascroppiecesformaprotectivesurfaceoverthesoil.2021/5/922covercropsThesecropspreventwaterandsoillossby…Covercropsalso…2021/5/923Bycyclingcropsthatneeddifferentnutrientsthroughthesamefield,thesoil…2021/5/924Ⅰ.statisticssunburntoutputcirculatednationalitystruggleddecaderegretThereforenutritionⅡ.A)1.根据2.buildup

3.幸亏，由于4.leadto5.对…感到满意6.focuson7.宁愿，宁可8.keep…freefrom/of9.摆脱，除去10.withthehopeof1.withthehopeof2.leadto3.buildup4.wouldrather5.keepfreefrom6.befocusedon7.wassatisfiedwith8.Accordingto9.Thanksto10.ridof2021/5/9252021/5/926Ⅰ.

underlinesummaryexportsbacteriachemical

expands

Ⅱ.productionhungrydisturbingfreedomequipmentoccupationconfusingdiscoverycommentsreducedⅢ.morethancaredforasasputbackdoneresearchon2021/5/927_____thepasthalfcentury在过去的半个世纪期间______fertilizers化学肥料

______useof…的长期使用cause______to对…造成伤害______off洗掉food_____食品供应______cancer导致癌症In______另外，此外turnto_____farming转向有机农业

____on集中…于____soil________disease使土壤免受疾病的影响

every_________每隔几年12.make______readyfor使…为做好准备13.

putdown_____扎根14.avoid______避免做某事2021/5/928Whataresomeoftheproblemscausedbychemicalfertilizers?Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition.化肥带来的问题有哪些呢？另外，施过化肥的水果、蔬菜和其他食物通常生长得过快而营养不足。过去分词作定语2021/5/9293.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadingforcropssuchaswheatorcornthatneedrichandfertilesoil.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土壤肥沃的农作物比如玉米或者小麦。现在分词做定语2021/5/9304.Organicfarmersalsoplantcropstousedifferentlevelsofsoil,forexample,plantingpeanutsthatusethegroundsurfacefollowedbyvegetablesthatputdowndeeproots.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，他们先种植生长于浅层土壤的花生，然后再种植生根于深层土壤的蔬菜。过去分词作定语2021/5/931takeplaceturnupset

offgetawaywithcutdownbringupaccountforbreakoutratherthansettledownmoveoffcomeacrosscarryonbuildup发生出现，到场，调大出发，动身，使爆炸不因…受惩罚砍倒，削减，删节抚养，培养，教育，提出是…的原因，解释爆发，突发与其，不愿定居，平静下来，专心于离开，启程，出发偶然遇见继续，坚持逐渐增强，建立，开发2021/5/932DearMr.Smith,I’mwritingtoinviteyoutojoinusintheEnglishpoetryrecitalcompetitiononJuly4.thecompetitionisgoingtotakeplaceonthesecondflooroftheteachingbuildingfrom7p.m.to9p.m.,duringwhichtimeparticipantswillrecitetheirfavoriteEnglishpoems.ThosewhowintheprizeswillsharetheirexperienceinlearningEnglish.Itwouldbeagreatpleasureifyoucouldcomeandbeoneofthejudges.I’msurewewillhaveawonderfultimetogether.Lookingforwardtoyourreply.Yourssincerely,LiHua2021/5/933ButMomrefusedtogiveup.“I’msuresheisstillins