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类型人教版高中英语Book 4 Unit 2 using language 教学课件(共20张PPT).ppt

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    1、fertilizerNew wordsc_ produced by or using chemistryo_ grow food without using artificial chemistryp_ insects or small animalsd_ to find information,a place especially for the first times_ the material on the surface of the ground in which plants grow r_ to make something smaller in size,amount,degr

    2、ee,importance hemicalrganicestiscoveryoileducePhrasesbuild uplead tofocus onkeepfree from/of逐渐增加,建立;开发通向;导致;造成(后果)集中(注意力、精力等)于是。免受。All roads _Rome.The childrens attention is _ their toys.He has _ a good businessWe must _ the world _ hunger.lead tofocused onbuilt upkeep free fromFast-readingCan you t

    3、ell the main idea of this passage?Long-term use of chemical fertilizers can cause damage to the land and to peoples health,so nowadays some farmers and many customers are beginning to turn to organic farming.Reading for detailsPara 121.Why are chemical fertilizers so popular in farming today?They ar

    4、e a great way to stop crop disease and increase production.2.What problems can be caused by using chemical fertilizers?They can damage the land by killing helpful bacteria and pests.They can stay in the ground and underground water for a long time.They damage peoples health by building up in their b

    5、odies and leading to cancer or other illnesses.Fruit,vegetables and other food grown grow too fast to full of much nutrition.Para 341.What is organic farming?Reading for details2.Whats the main reason for using organic farming methods?Organic farming is simply farming without using any chemicals.The

    6、 main reason for using organic farming methods is to grow good food and to avoid damaging the environment or peoples health.Find and underline the topic sentence of each paragraph.Topic sentencePara 1:Recently,however,scientists have been finding that long-term use of these fertilizers can cause dam

    7、age to the land and even more dangerous,to peoples heath.Para 2:What are some of the problems caused by chemical fertilizers?Para 3:With these discoveries,some farmers and many customers are beginning to turn to organic farming.Para 4:Organic farmers also use many other methods to keep the soil fert

    8、ile.Topic sentence-SummaryPara 1:Recently,however,scientists have been finding that long-term use of these fertilizers can cause damage to the land and even more dangerous,to peoples heath.开头:Scientists have discovered It is reported that It is found thatlong-term use of?cause damage todo harm to be

    9、 harmful for hurt have harmful effects/influences onusing.for a long timethe overusing ofYour sentence?Para 2:What are some of the problems caused by chemical fertilizers?It causes many problems.There are several problems caused by chemical fertilizers.1.damage the land 2.affect crops3.grow too fast

    10、 to be full of much nutritionreduce nutrition in fruits and vegetablesYour sentence?Para 3:With these discoveries,some farmers and many customers are beginning to turn to organic farming.Organic farming is simply farming without using any chemicals.Organic farming is becoming more popular with some

    11、farmers and many customers.Some farmers and many customers start to pay attention to/focus on organic farming.合成一句话?1.用定语从句2.用介词结构Para 4:Organic farmers also use many other methods to keep the soil fertile.fertile=make the soil rich and productivemethods=ways;approachesYour sentence?Topic sentence-S

    12、ummaryPara 1:Recently,however,scientists have been finding that long-term use of these fertilizers can cause damage to the land and even more dangerous,to peoples heath.Para 2:What are some of the problems caused by chemical fertilizers?Para 3:With these discoveries,some farmers and many customers a

    13、re beginning to turn to organic farming.Para 4:Organic farmers also use many other methods to keep the soil fertile.Recently,scientists have discovered that using chemical fertilizers for a long time can hurt the land and also peoples health.There are several problems caused by chemical fertilizers.

    14、Organic farming is becoming more popular with some farmers and many customers after these discoveries came out.There are many organic farming methods for making the land healthy and productive.Methods of organic farmingAdvantages of methods1.Farmers use natural waste from animals.1.This makes the so

    15、il richer in minerals and so more fertile.2.Farmers often change the kind of crop in each field every few years.3.Farmers plant crops with different lengths of roots.2.Changing the crops renews the minerals in the soil and helps it become rich and healthy.3.This uses different levels of soil.4.Farme

    16、rs sometimes plant grass between crops and leave it in the ground.4.This prevents wind or water from carrying away soil and acts as a natural fertilizer.Fill in the formYour farm-an organic farmBUY THE BEST VEGETABLES HEREWe sell only green food in this farm shop!The best choice at the best prices!G

    17、reen food is safe and healthy for you and all the family.No chemical fertilizersGrown in clean air Grown with clean waterNo pesticide to poison your familyEating green food is an important step on the road to staying fit and healthy!Sample dialogueF=farmer C=customerF:Good morning!Would you like som

    18、e organic carrots this morning?C:HmmTheyre a little expensive.What is the advantage of?F:The advantage of these vegetables is that they are green food so theyre safe to eat and good for your family.C:But whats the advantage of having green food?I know all vegetables are good for you and those look g

    19、reen too.And I can buy them at half price.F:Well,let me explain.Id rather feed my family on green food than other vegetables because they are grown without chemical fertilizers.C:But the price is too expensive!Id prefer to buy good food if I can afford it.F:This is good value for money because youll have healthier children.They wont have to go to the doctor so often and you wont have to take time off work.In the long run youll be benefit.C:Certainly Id like to buy what is safe and healthy.Perhaps Ill try some of your vegetables and if they are as good as you say.Ill be back next week!

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