2020年北师大版高中英语选修7课件Unit21

1、Unit 20 New Frontiers,Scientific Breakthroughs in the 21st Century It is predicted that there will be 5 scientific breakthroughs in the 21st century. Well know where we came from.Why does the universe exist？To put it another way，why is there something instead of nothing？Since the 1920s，scientists have known the universe is expanding，which means it must have started at a definite time in the past.We will have a better understanding of how matter behaves at the extremely high temperatures and。

2、Unit 19 Language,The Road to Modern English At the end of the 16th century，about five to seven million people spoke English.Nearly all of them lived in England.In the next century，people from England started moving to other parts of the world，so English began to be spoken in many other countries.,话题导入,All languages change when cultures communicate with one another.The English spoken between about AD 450 and 1150 was very different from the English spoken today.Actually，it was based more 。

3、Unit 20 New Frontiers,基础自测,内容索引,要点探究,达标检测,Period Two Lesson 2 Artificial Intelligence,基础自测,.重点单词 1. vt.主持(电视或广播节目)；呈现n.存在；到场；出席 2. n.类别；类型 3. adj.自主的；自治的 4. n.电脑程序编制员n.程序；节目 5. n.创造者vt.创造,present presence,category,autonomous,programmer programme,creator create,6. n.官员adv.官方地，正式地 7. n.同事，同僚 8. vt.拯救，救援 9. n.出口 10. adj.起初的；最早的adv.最初，起初n.起源；出身,o。

4、Unit 19 Language,基础自测,内容索引,要点探究,达标检测,课文预读,Period Four Communication Workshop，Language Awareness 4，Culture Corner & Bulletin Board,基础自测,.重点单词 1. n.申请人v.申请；应用 2. n.证书；证明 3. n.能力adj.有能力的，足以胜任的 4. n.毕业证书 5. vt.登记 6. n.候选人,applicant apply,certificate,competence competent,diploma,register,candidate,7. n.图解；图表 8. n.地球adj.全球的 9. vt.束紧 10. 。

5、Unit 20 New Frontiers,内容索引,单元写作An article,单元语法Future perfect & Future continuous,Period Five Grammar & Writing,单元语法 Future perfect & Future continuous,语法感知,语法导学,用所给动词的正确形式完成课文原句 1.By the year 2015，the clothing industry (produce) new types of material that will remain stainless no matter what you spill on them. 2.By the year 2030，development in biochemistry and medical science (make) it theoretically possible for us to live for at least 150 years.,wi。

6、Unit 19 Language,基础自测,内容索引,要点探究,达标检测,Period Two Lesson 2 Varieties of English,基础自测,.重点单词 1. n.老兄，老弟，伙计 2. n.奶油；油 3. n.剃刀 4. n.小册子 5. n.出租汽车 6. n.亲戚，亲属,mate,cream,razor,brochure,cab,relative,.重点短语 1. 学会 2. 很久，很长时间 3. 继续 4. 离开 5. 独立地；独自地 6. 遵守，信守；坚持,catch on,for ages,go on with,go off,on ones own,keep to,.重点句式 1.the比。

7、Unit 20 New Frontiers,基础自测,内容索引,要点探究,达标检测,课文预读,Period Three Lesson 3 Scientific Breakthroughs,基础自测,.重点单词 1. n.困境，进退两难的窘境 2. n.步骤；程序 3. vt.捐赠；赠送n.捐赠；赠送；捐赠物 4. vi.通信；符合 5. adv.同时 6. vi.分开，分离 7. adj.最重要的,dilemma,procedure,donate donation,correspond,meanwhile,split,premier,8. adj.直言的，坦率的 9. n.后果，结果 10. vt.治愈 11. vi.努力解决；摔跤；搏斗 1。

8、,Unit 21 Human Biology,The first wealth is health. Emerson 健康是第一财富 爱默生,单元核心素养：思维品质,If you are taking vitamin supplements(补充物) to reduce your risk of heart disease or cancer，a group of health experts want you to know that those vitamins may actually increase your risk of cancer. The US Preventive Services Task Force came to this conclusion after reviewing dozens of studies. Nearly half of adults in the US take at least one vitamin or mineral supplement on a regular basis.。

9、,Unit 21 Human Biology,PART 1,基础自测,PART 2,互动探究,PART 3,达标检测,Warm-up & Lesson 1 Super AthletesLanguage Points,PART 1,基础自测,默写练习(一),.写出下列单词的汉语意思(共10小题；每小题2分，满分20分) 1.interval n. _ 2.pump vi. _ 3.digest vt. _ 4.hearing n. _ 5.pulse n. _ 6.supreme adj. _ 7.seek vt. _ 8.lame adj. _ pulsory adj. _ 10.violate vt. _,查看答案,间隔；间歇,用泵抽出(注入),消化；领悟,听觉,脉搏,(程度)最大的，极度的,寻找,站不住脚的，。

10、,Unit 21 Human Biology,PART 1,基础自测,PART 2,课文预读,PART 4,达标检测,Communication Workshop，Language Awareness 6， Culture Corner & Bulletin Board,PART 3,互动探究,PART 1,基础自测,默写练习(四),.写出下列单词的汉语意思(共10小题；每小题2分，满分20分) 1.weekly adj. _ 2.temporary adj. _ 3.numb adj. _ 4.sacred adj. _ 5.terminal adj. _ 6.minimum n. _ 7.institution n. _ 8.firm n. _ 9.rate n. _ 10.deadline n. _,查看答案。

11、Unit 21 Human Biology,基础自测,内容索引,要点探究,达标检测,Period Two Lesson 2 Brain Power,基础自测,.重点单词 1. adj.荣幸的n.特权，优待vt.给予特权，特别优待 2. vi.满足；迎合vt.(为社交活动)提供饮食，承办酒席 3. n.进入；入学vt.进入；开始从事；输入 4. adj.充足的，充裕的,privileged privilege,cater,entry enter,ample,5. n.扫描vt.浏览 6. vt.款待；把看作；以方式/态度对待；治疗；处理n.乐事；乐趣；款待 7. n.储存vt.储存；贮藏；保存n.商店；仓库 8. vt.推迟，延期,scan,treat,storage store,postpone,.重点短语 1. 。

12、Unit 21 Human Biology,How to Add 5 Years to Your Life Half an hour of exercise a day can add an extra five years to your life，a groundbreaking(开创性的) research has revealed.Health experts said that walking or cycling gently has big long-term benefits.According to the World Health Organization，research carried out in Britain and Denmark shows that gentle workouts(锻炼) and even housework every day can boost life spans by as much as five years.,话题导入,The news will provide encouragement for 。

13、Unit 21 Human Biology,内容索引,单元写作A discursive essay,单元语法Conditional revision mixed conditionals & Modality,Period Five Grammar & Writing,单元语法 Conditional revision mixed conditionals & Modality,语法感知,语法导学,.用所给词的正确形式填空 1.If you had posted the letter，Joan (receive) it last Monday. 2.What would you say or do if someone (call) you a fool? 3.If he (not，be) ill，he would have done something to help us. 4.If you had stud。

14、Unit 21 Human Biology,基础自测,内容索引,要点探究,达标检测,课文预读,Period Four Communication Workshop，Language Awareness 6，Culture Corner & Bulletin Board,基础自测,.重点单词 1. adj.每周一次的 2. adj.临时的；短暂的 3. vt.使丧失；抢劫n.强盗；盗贼 4. vi.&vt.下降；减少；衰退；拒绝n.减少；下降；衰退 5. n.最低；最小 6. n.团体；公共机构,weekly,temporary,rob robber,decline,minimum,institution,7. adv.无条件地n.条件 8. vt.使有准备；装备，配备 9. n.商行，公司 10。

15、Unit 21 Human Biology,基础自测,内容索引,要点探究,达标检测,课文预读,Period Three Lesson 3 Epidemics Explained,基础自测,.重点单词 1. adj.城市的 2. vt.重建 3. n.试验；试用；审判 4. vt.禁止n.禁止；禁令 5. vt.联合；团结；统一 6. n.停顿；暂停 7. n.统计资料；统计数字,urban,rebuild,trial,prohibit prohibition,unite,pause,statistics,8. n.症状 9. n.常规；惯例 10. n.新闻界；报界vt.压；按；紧握；逼迫 11. n.相似之处；平行线 12. n.变化；变种 13.。

16、,Unit 21 Human Biology,PART 1,语法导学,PART 2,达标检测,GrammarConditionals and Mixed Conditionals & Modality,PART 1,语法导学,感悟规律 重点难点剖析,感知以下课文原句，完成方框下的小题,(一),1.在if虚拟条件句中，如果表示与现在事实相反的假设，则if条件句的谓语动词的时态为： ，主句的谓语动词的形式为：_ ，如 。 2.在if虚拟条件句中，如果表示与过去事实相反的假设，则if条件句的谓语动词的形式为： ，主句的谓语动词的形式： 。如 。 3.如果虚拟条件句和主句表示的动作发生的时间不一致，则主从句动词的形式应根据各自所表。

17、,Unit 21 Human Biology,PART 1,基础自测,PART 2,互动探究,PART 3,达标检测,Lesson 2 Brain Power,PART 1,基础自测,默写练习(二),.写出下列单词的汉语意思(共8小题；每小题1.5分，满分12分) 1.cater vi. _ 2.ample adj. _ 3.scan n. _ 4.postpone vt. _ 5.supreme adj. _ 6.lame adj. _ pulsory adj. _ 8.violate vt. _,查看答案,满足；迎合,充足的，充裕的,扫描,推迟，延期,(程度)最大的，极度的,站不住脚的，不易令人相信的,强制性的，义务的,违反，违背；亵渎,.写出下列汉语对应的英语单词(共8小题；每小题1.5分，满分12分) 9.荣幸的ad。

18、,Unit 21 Human Biology,PART 1,基础自测,PART 2,课文预读,PART 4,达标检测,Lesson 3 Epidemics Explained,PART 3,互动探究,PART 1,基础自测,默写练习(三),.写出下列单词的汉语意思(共10小题；每小题2分，满分20分) 1.urban adj. _ 2.rebuild vt. _ 3.trial n. _ 4.unite vt. _ 5.pause n. _ 6.acute adj. _ 7.statistics n. _ 8.symptom n. _ 9.routine n. _ 10.parallel n. _,查看答案,城市的,重建,实验；试用；审判,联合；团结；统一,停顿；暂停,严重的；剧烈的,统计资料；统计数字,症状,常规；惯例,极相似之处；平行。

19、,Unit 21 默写练习(五),.单元知识回顾(共50小题；每题1.2分，满分60分) 1.减速 _ 2.偶遇 _ 3.写出与seek有关的短语 (1)试图/设法做某事 _ (2)寻求；追求 _ (3)找遍 _ (4)搜寻出 _ 4.徒劳，白费力气 _ 5.随便地；随意地 _,查看答案,slow down,come across,seek to do sth.,seek after/for,seek through,seek out,in vain,at random,6.写出与cost有关的短语 (1)不管多大代价，无论如何 _ (2)不惜一切代价 _ (3)以为代价 _ 7.迎合(的爱好) _ 8.立刻，马上 _ 9.写出与bring有关的短语 (1)提出；抚养；呕吐 _ (2)引入；赚得 。

20、,Unit 21 Human Biology,PART 1,技法点拨,PART 2,写作训练,WritingA Discursive Essay,PART 1,技法点拨,文体分析 把握写作动脉,正反观点类议论文与一般议论文的写法相同。一般包括以下三点： 1.在文章开头提出问题，即提出论点。问题的提出要开门见山，不要拖泥带水； 2.在议论时要有充分的论据，可以运用列举事实、展示数据、提供实例等方法； 3.在结论部分发表自己的观点。观点必须鲜明，不能模棱两可。 正反观点类议论文的写作一般分为四步： 第一步：介绍话题； 第二步：从正方角度论证； 第三步：从反方角度论证； 第四步：阐述表明。