2021新版人教版选修一英语Unit 5 writing ppt课件.pptx

1、人教（人教（20202020）选择性必修一）选择性必修一 Unit 5Unit 5 Evaluate chemical farming and organic farmingEvaluate chemical farming and organic farming para1-2 para3 para4 para5 bacteria and insectsbacteria and insects prohibitedprohibited damage they cause to people and the environmentdamage they cause to people and

2、the environment grow too fastgrow too fast water insidewater inside natural waste from animalsnatural waste from animals change the kind of cropchange the kind of crop every yearevery year different depthsdifferent depths demand for food around the worlddemand for food around the world A. What organ

3、ic farming isA. What organic farming is B. Why man B. Why man - -made chemicals are still made chemicals are still used in farmingused in farming C. Organic methods for producing rich C. Organic methods for producing rich soilsoil D. The problems with chemical farming D. The problems with chemical f

4、arming D D A A C C B B Read again, and make comparisons between chemical farming and organic farming.Read again, and make comparisons between chemical farming and organic farming. 1.widespread use since the middle of the 20th century 2.kill harmful bcteria and insects soil waste plankton water Accor

5、ding to the infomation you ve learnt from the text, come up with three main points According to the infomation you ve learnt from the text, come up with three main points to support your opinion, and then add at least one detail to support each main points. to support your opinion, and then add at l

6、east one detail to support each main points. Complete the outline below.Complete the outline below. Topic sentenceTopic sentence: In my opinion, _farming is preferable : In my opinion, _farming is preferable to_ farming because_.to_ farming because_. Point Point 1:_1:_ _ _ (detail)_(detail)_ _ _ Poi

7、nt Point 3:_3:_ _ _ (detail)_(detail)_ _ _ Point Point 2:_2:_ _ _ (detail)_(detail)_ _ _ ConclusionConclusion: _.: _. 01 The shelter, which could protect up to 8,000 people from wartime bombs, _ two large tunnels that were intended to one day become an extension of the London underground. was compri

8、sed of was comprised of bomb: n. bomb: n. 炸弹炸弹 vt. vt. 轰炸轰炸 对对.投炸弹投炸弹 e.g. bomb threat / bomb explode They bombed the city at dawn . extension: n. extension: n. 扩建部分；扩建部分； 扩大；扩大； 电话分机电话分机 e.g. the extension of the Presidents powers. extension number extend : v. extend : v. 扩大；伸出；延长；延伸；提供；包括；扩大；伸出；延长

9、；延伸；提供；包括； e.g. They asked the government to extend its period of deliberation（审议）. The neighbourhood came to extend their congratulations on his sons admission to the university. 02 chemistry n. 化学；化学过程 chemical n. 化学制品，化学药品 复数 chemicals adj. 化学的 1. The whole food chain has been affacted by the ove

10、ruse of _ in agriculture. (chemistry, chemicals) 2. Organic _ is considered to have originated in the early 19th century.(chemistry, chemicals) chemicals chemicals deliberation. 03 However, what she is unhappy about is the lower nutritional value and reduced flavour. flavour: n. flavour: n. 味道；风味；特点

11、味道；风味；特点 v. 给.调味 bitter flavour /delicate flavour six different flavours of ice-cream The stories have a strong regional flavour. I have tried to convey something of the flavour of the argument. (像.的想法） 04 This affects the crops grown on the land and , in turnin turn, the animals and humans who dige

12、stdigest them. All this has upset me. I need time to All this has upset me. I need time to digest it all.digest it all. GreasyGreasy（油腻的）（油腻的） food is hard to digest.food is hard to digest. This text is difficult to digest.This text is difficult to digest. 05 As for chemical fertilisers, crops grown

13、 with them usually grow too fast to be rich in nutrition. nutritionnutrition：（：（u)u) n. n. 养料的供给；养料的摄取；营养学；食物；营养物养料的供给；养料的摄取；营养学；食物；营养物 poor nutrition poor nutrition 营养不良营养不良 A balanced diet provides nutrition for your body.A balanced diet provides nutrition for your body. Despite numerous claims th

14、at mealDespite numerous claims that meal- -replacement products provide sufficient replacement products provide sufficient nutrition nutrition and calories, using them over a long period, insteadof eating three regular and calories, using them over a long period, insteadof eating three regular meals

15、 a day, could pose health risks, according to experts.meals a day, could pose health risks, according to experts. Yang Yuxiang ,a seniorYang Yuxiang ,a senior nutritionist nutritionist ,said choosing healthy meal,said choosing healthy meal- -replacement replacement products could be an acceptable su

16、bstitute for people who want to control their products could be an acceptable substitute for people who want to control their weight.weight. Meal replacement need to have enough healthy Meal replacement need to have enough healthy nutrientsnutrients as well as vitamins and as well as vitamins and mi

17、nerals.minerals. Experts call for “healthier, safer, and more Experts call for “healthier, safer, and more nutritiousnutritious diets ”.diets ”. adj. 营养丰富的 （n./adj)营养素，营养物 adj. nutritionaladj. nutritional营养的营养的 06 They may look beautiful on the outside, but inside there is usually more water than es

18、sential minerals. essential: adj. essential: adj. 比不可少的，比不可少的， 最重要的最重要的 essentially: adv. essentially: adv. 本质上，本质上， 根本上根本上 （basically)basically) 1). be essential to sth1). be essential to sth 2). be essential for sb to do sth2). be essential for sb to do sth 3). It is essential that. (should) do st

19、h3). It is essential that. (should) do sth 4). It is essential for sb to do sth4). It is essential for sb to do sth Sun and water is/ are essential to the growth of crops.Sun and water is/ are essential to the growth of crops. The words are essential for everyody to learn English.The words are essen

20、tial for everyody to learn English. It is essential that you get a visa before you travel abroad.It is essential that you get a visa before you travel abroad. It is essential for highIt is essential for high- -new technology enterprises to strengthen new technology enterprises to strengthen competit

21、ive petitive power. 07 As an alternative, some farmers have switched to organic farming,. alternative: alternative: v. alter v. alter （使）改变，（使）（使）改变，（使） 变化变化 adj. (adj. (只用于名词前）可供替代的，可供选择的只用于名词前）可供替代的，可供选择的 非传统的，另类的非传统的，另类的 n.(c) n.(c) 选择，选择， 供选择的东西供选择的东西 adv. alternatively adv. alternatively 二者选其一地

22、；二者选其一地； 或者或者 The way was blocked, so we went by an alternative road.The way was blocked, so we went by an alternative road. an alternative lifestyle / alternative energyan alternative lifestyle / alternative energy I had no alternative but to report him to the police.I had no alternative but to rep

23、ort him to the police. I hope my books can provide an alternative to parents who want I hope my books can provide an alternative to parents who want their kids to learn more about Chinese culture. their kids to learn more about Chinese culture. I could come to your house, I could come to your house,

24、 or alternativelyor alternatively we could meet in town.we could meet in town. 08 . but many other vegetables put down deep roots. rootroot n. n. （c) c) 根，根， 根源，根源， 起源，词根起源，词根 v. (v. (使）生根，使）生根， （使）扎根（使）扎根 rooted: adj. rooted: adj. 一动不动的，生了根似的一动不动的，生了根似的 After 20 years in America, he still feels his

25、 roots are in China.After 20 years in America, he still feels his roots are in China. the root of sth . the root of sth . 之源之源 has ones roots in . .has ones roots in . .起源于起源于. . take root in ones mind take root in ones mind 在某人的头脑里生根在某人的头脑里生根 she found herself rooted to the spot in disbelief.she fo

26、und herself rooted to the spot in disbelief. 09 What other important aspects of agriculture do you want to know about? aspect:aspect: (c) (c) 方面方面 （U U）外观，样子）外观，样子 in this/ that aspectin this/ that aspect in every aspect / from every aspectin every aspect / from every aspect Technological change is

27、everywhere and affects every aspect of life.Technological change is everywhere and affects every aspect of life. Our school takes on an entirely new aspect.Our school takes on an entirely new aspect. lunli 词块积累 1. for instance 2. in turn 3. at a depth of 4. a diverse range of crops 5. high cost of p

28、roducing food 6. great effort required to farm 7. keep people and the environment as healthy as possible 8. find a suitable solution 9. nowhere near 10. damage to the environment 11. switch to 12. a great way to increase production 13. in widespread use 14. organic farming 例如，比如 相应的，轮流 深达. 各种各样的农作物 生产粮食的高成本 耕种所需的巨大努力 保持环境和人尽可能的健康 找到适合的办法 远非，绝不是 对环境造成的伤害 转向 增加产量的好方法 广泛的使用 有机农业 Thank You !