人教版必修四unit2-reading-和练习讲解

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1、Unit 2 Working the land,pre-reading,What problem do they show ?,hunger,How do you feel when you see the pictures?,Do something to rid the world of hunger!,How much land can be used for farming?,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

2、of this part is used for roads, buildings like houses, schools!,4. Only 1/32 of the earth is used for farming!,A Pioneer For All People,Super hybrid rice,Task 1 Scanning,Para1 A. Dr Yuans dreams. Para2 B. Dr Yuans personality. Para3 C. Dr Yuans biography. Para4 D. Dr Yuans appearance and his achieve

3、ment.,Para 1 Appearance and Achievement.,Appearance face: arm: body:,sunburnt,sunburnt,slim but strong,looks like a_,farmer,Although 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

4、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.,Appearance face: arm: body:,sunburnt,sunburnt,slim but strong,looks like a_,farmer,2. achievem

5、ents,He grows what is called_, which makes it possible to produce_ more of the crop in the same fields.,super hybrid rice,one-fifth,Para. 2 His biography,Born in Beijing,Graduated from college,Hunger was a disturbing problem. search for a way to increase the rice harvest.,200 million tons was produc

6、ed,Circulating his knowledge,22% 7%,Means?,UN rid the world of hunger,Thanks 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,Paragraph 3,To

7、pic sentence? Dr Yuan is quite satisfied with his life. He doesnt care about _ and _. He likes freedom for his search and hobbies.,fame,money,Personality,Para 4: his dreams,His first dream,His second dream,As tall as sorghum As big as an ear of corn As huge as a peanut,To export his rice so that it

8、can be grown around the globe.,1. himself (as) a farmer 认为他自己是个农民 2. the land 耕种土地,在田间耕作 3. do ones 进行研究 4. face and arms 被太阳晒黑的脸庞和手臂 5. the past five 在过去的50年里 6. the first agricultural pioneer rice 第一个种高产水稻的农业先锋 7. a high 高产量 8. graduate Southwest Agricultural College 从西南农学院毕业 9. life 人生目标 10. the

9、great need 对巨大的需求,11. a problem 一个令人烦恼的问题 12. search 寻找 13. without _ _ the area of fields不扩大农田面积 14. ones knowledge 传播知识 15. developed countries 欠发达国家 16. 幸亏,由于 17. the world hunger 消除(解决)世界饥饿 18. harvests twice before 产量是从前的两倍 19. be quite 对.非常满意 20. care 喜欢;照顾;关心; _ _ little about对很少关心,21. would

10、rather sth. 宁愿做 22. spend 在.上花费. 23. a comfortable life 过舒适的生活 24. rather 而不是 25. _sb. for 使做好准备,为装备 26.give him less _ to do sth 给他更少的自由 27._ _ from 从中醒来 28. the hope of 怀着希望 29._ _ rice出口大米 30. the globe 全球,全世界 31. make it possible _ _使成为可能,As a young man, he saw the great need for increasing the

11、rice output. At that time, hunger was a disturbing problem in many parts of the countryside.,When he was young, he know how important it was to produce bigger rice crops.,= it is important to = doing sth. is important/of great importance,During his early years, much of the countryside was troubled b

12、y hunger.,= be badly influenced/affected by,have a bad effect on,Using his hybrid rice, farmers are producing harvests twice as large as before. Spending money on himself or leading a comfortable life also means very little to him.,As they use his hybrid rice, farmers are producing twice as much ric

13、e as before.,He is not interested in/cares little about buying things for himself or having a,Just dreaming for things, however, costs nothing.,It doesnt cost anything to dream for something.,A3 B篇,What is CA? What are the three principles of CA? How does CA help reduce soil damage? What are the fun

14、ctions 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 by,become popular,Control tillage What is tillage?,turn over nutr

15、ient current unusable,By avoiding tilling, organic soil matter may actually benefit as crop pieces form a protective surface over the soil.,cover crops,These crops prevent water and soil loss by Cover crops also,By cycling crops that need different nutrients through the same field, the soil,. statistics sunburnt output circulated nationality struggled 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

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