【课件】Unit 5 Using Language 课件人教版高中英语选择性必修第一册.pptx

Chemical Versus Organic Farming化学与有机农业的比较 vss versusprep.与相对;与对阵各段长难句和短语第一段：3.Over time,however,what some scientists have found is that their long-term use can sometimes harm both the land and peoples health.短语：1.被广泛使用 be in widespread use2.首次被引入 be first introduced3.做某事的好方法 a great way to do sth4.随着时间的推移 over time第二段：3.This affects the crops grown on the land and,in turn,the animals and humans who digest them.in turn 轮流相应地When you play cards,each plays in turn.Working outside can mean too much sun exposure,which in turn can lead to skin cancer.by turns轮流take turns to do sth轮流做某事Its ones turn to do sth轮到某人做某事Sam and I drove cars _ turns.In our class,we take turns _(do)the duty report.byto do5.In fact,some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment.定语从句，省略了引导词that/which6.As for chemical fertilisers,crops grown with them usually grow too fast to be rich in nutrition.grow-grew-growngrowth短语：1.通过做某事 by doing sth2.此外 in addition3.至于，关于as for4.化肥chemical fertiliser5.富含营养be rich in nutrition6.必要的矿物质essential minerals7.口味不足have less flavour8.也as well第三段：短语：1.转向 swith to/turn to2.聚焦于 focus on3.没有疾病 free of disease4.means单复同形第四段：2.They often change the kind of crop grown in each field every year.4.Why different crops are grown is because they put important minerals back into the ground,making it ready again for the next batch of crops.短语：1.比如 for instance2.不同层次的土壤 different depths of soil3.扎根很深 put down deep roots4.避免破坏环境 avoid damage to the environment第五段：2.What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world.阻止他们这样做的原因是，化学农业服务于全世界对食物的高需求。

3.Organic farming is nowhere near able to meet that need.绝不可能.满足那一需求4.Therefore,there is still a long way to find a suitable solution that puts sufficient food on the dinner table while keeping people and the environment as healthy as possible.课文知识点1.not only.but(also).She ont only _(write)the text but also seltcted the illustrations.lstren n.插图 Not only my friend but also I _(be)present at the conference.就近wroteam2.make+宾语+宾补 名词/介词短语/形容词 动词原形/过去分词 The boss made them _ day and night.老板让他们日夜工作workThe experience will make him_.这次经历会让他成为一个男子汉。

a man Can you make yourself _(understand)in Russian?Nothing will make me _(change)my mind.Tom asked the candy-maker if they could make the chocolate easier _.(break)understoodchangeto break3.现在分词做结果状语 Many people moved to New York,making it the largest city in the USA.His parents died early,leaving him an orphan.He fell off the bike,_.头撞到一块大石头上More highways have been built in China,_(使.更容易）for people to travel from one place to another.knocking his making it easierhead on a rock 4.同位语从句 I have no idea_ in the next room now.她在干什么 There arose the question _ _.我们到哪里弄贷 款。

what she is doingwhere wecould get a loanlnMy original question,_,has not been answered.why she did that。