2020年北师大版高中英语选修7课件：Unit21 Warm-up & Lesson 1 Super Athletes—Pre-reading

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1、,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 Ser

2、vices 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.These pills are advertised as a way to promote general health.In some cases，they are promoted as cancer fighters and heart pr

3、otectors.,话题导入,Studies in animals and in laboratory dishes suggest that oxidative(氧化性的) stress contributes to diseases like cancer and heart disease.If so，there is a reason to believe that antioxidantsincluding vitamins A，C，and Ecould be useful as preventive medicines. But when the Task Force examin

4、ed the medical evidence on vitamins，it found “inadequate evidence” to support the conclusion that vitamin and mineral supplements benefit healthy adults. Dr.Virginia Moyer，who heads the Task Force，said in a statement that they all wanted to find ways to prevent these diseases like cancer and heart d

5、isease.But so far，the medical evidence does not show that taking vitamins is helpful.,However，the Task Force did find “adequate evidence” that people with a raised risk for lung cancer actually increase their risk further by taking some pills containing vitamin A. The Task Force recommendations of t

6、aking vitamins regularly apply to healthy adults aged 50 and older who dont have “special nutritional needs”.The advice does not apply to children，women who are pregnant or may become pregnant，or people who have to take supplements because they cant get all their essential nutrients from their diet.

7、,1.Studies in animals find out oxidative stress can lead to heart disease and cancer.( ) 2.A 60-year-old healthy worker cant take vitamins regularly according to the advice of the Task Force.( ),根据短文判断正(T)、误(F),F,T,查看答案,PART 1,读前清障,PART 2,课文理解,Warm-up & Lesson 1 Super AthletesPre-reading,PART 1,读前清障

8、,匹配左边的单词与右边的汉语意思 第一组 1.interval A.循环 2.circulate B.消化；领悟 3.pump C.交换 4.digest D.间隔；间歇 5.swap E.用泵抽出(注入),查看答案,第二组 6.hearing A.(程度)最大的，极度的 7.pulse B.滥用 8.supreme C.听觉 9.abuse D.容忍 10.tolerate E.脉搏,查看答案,第三组 11.fundamental A.每年的，一年一次的，年度的 12.doubtful B.寻找 13.seek C.怀疑的，不肯定的 14.annual D.站不住脚的，不易令人相信的 15.

9、lame E.根本的；基础的,查看答案,第四组 pulsory A.与(其他事物)相矛盾 17.controversial B.反对 18.oppose C.强制性的，义务的 19.contradict D.违反，违背 20.violate E.有争议的,查看答案,PART 2,课文理解,1.What is the main idea of the passage? A.All the athletes were caught doping in 2006 cycling race. B.The future of the sporting world is being affected by

10、 Maurice Greene. C.All the athletes are training hard for the games. D.The sporting world is being seriously affected by doping and gene-therapy.,查看答案,Step 1 Fast-reading,2.Match the main idea with each paragraph. (1)Paras.12 A.The Olympic spirit (2)Paras.36 B.Gene-therapy (3)Para.7 C.Records have f

11、allen (4)Para.8 D.Doping,查看答案,.True(T) or False(F). 1.According to the whole text，better equipment，training and diet are the reasons given for improved performances.( ) 2.Ben Johnson would still be the 100 metres world record holder even if he had taken drugs in the 1988 Olympics.( ) 3.Doping can he

12、lp athletes enhance their performance，however，the drugs also cause serious health problems in later life for those who abuse them.( ) 4.Doping is only a problem in athletics.( ) 5.The Olympic spiritthe spirit of competition emphasises winning rather than taking part.( ),查看答案,Step 2 Careful-reading,F

13、,F,T,F,F,.Read the passage carefully and choose the best answer. 1.Some past sports predictions were always . A.right B.wrong C.simple D.mature,查看答案,2.Whats the drugs legal effect? A.To make the athletes run faster. B.To make the audience cheer more excitedly. C.To cure the patients. D.To make money

14、 for the chemists.,查看答案,3.Which is RIGHT according to the passage? A.Some athletes want to achieve the championship with the help of doping. B.It is easy to clarify whether an athlete has taken drugs. C.Doping is the only problem in track and field. D.Gene-therapy will benefit the athletes.,查看答案,Aft

15、er reading the passage，please fill in the following blanks. Athletic performances have 1. (continue) improved since the first Olympic Games.However，improvements 2. (begin) to slow down recently.While 3. (talk) about breaking records，we come across the issue of performance-enhancing drugs，4. are orig

16、inally developed to help people with illnesses，but they are often used by some athletes to perform 5. (well) than usual.6. other words，doping is a fundamental form of cheating.Unfortunately，it is difficult to catch athletes 7. (use) illegal drugs.,查看答案,Step 3 Post-reading,continually,have begun,talk

17、ing,which,better,In,using,The winners have to be tested 8. other participants are only tested at random.New drugs 9. (develop) all the time and drug tests for sporting events are often one step behind.In the future，another big issue is gene-therapy.Athletes who have their genes 10._(change) might pe

18、rform much better in the match.In todays world，if doping and gene-therapy continue to affect the outcomes of major sporting events，the Olympic spirit will have lost its meaning.,查看答案,while,are developed,changed,1.These drugs are originally developed to help people with illnesses，but in the wrong han

19、ds，they create supreme athletes making them faster and stronger than is normal for human beings. 句式分析 本句是由but连接的并列句。第一个分句中不定式to help people with illnesses作目的状语；第二个分句中现在分词短语making.作状语；than引导比较状语从句。 自主翻译 _ _,开发这些药物原本是用来帮助病人的，但一旦用于歧途，它们会创造出比常人更快、更强的超级运动员。,查看答案,Step 4 Sentence-learning,2.Taking these dr

20、ugs is known as “doping” and although they enhance performance，they also cause serious health problems in later life for those who abuse them. 句式分析 Taking these drugs是动名词短语在句中作主语；is known as意为“被称为”；并列连词and后的句子中含有although引导的让步状语从句和who引导的定语从句。 自主翻译 _ _,服用这些药物的行为被称为“服用兴奋剂”。对滥用兴奋剂的运动员来说，尽管兴奋剂能提高他们的成绩，但也

21、会给他们日后的生活带来严重的健康问题。,查看答案,3.Floyd Landis made several lame excuses blaming medicine he had been taking for an injury but these were all in vain. 句式分析 本句是由but连接的并列句。第一个分句中blaming medicine是现在分词短语作状语；he had been.是定语从句，修饰medicine。 自主翻译 _ _,弗洛伊德兰蒂斯做了几次站不住脚的辩解，责怪他因伤服用的药物，但这些都是徒劳的。,查看答案,4.The Olympic spirit

22、the spirit of competition which emphasises taking part rather than winninghas been violated by the desire to succeed at all costs. 句式分析 本句是复合句。句子的主干是The Olympic spirit has been violated by the desire to succeed at all costs。the spirit of competition是同位语；which引导定语从句，修饰the spirit of competition。 自主翻译 _ _,人们不惜任何代价来获胜的愿望违背了重在参与而不是获胜的奥林匹克精神。,查看答案,