北师大版高中英语选修七Unit 21《Human Biology》(Lesson 3)课件
scientists have been doing tri. Lines 6- 8) (Page 38, treatments to prohibit any future outbreaks. 科学家们就一直在做治疗实验以防止将来再次 疫潮结束后, 非典” 从“ 爆发。 句子使用了现在 时间状语是 since the SARS epidemic ended, 1)在本句中, 完成进行时。 而要用 不能用现在完成时, 还要进行下去时, 在强调指出动作还未结束, 现在完成进行时。 t finished it yet. but I haven������ ve been writing the composition for two hours, I������ 还要继续 强调动作没有结束, 但还没写完。( 这篇作文我写了两个小时, 写下去)
1. Epidemics can wipe out up to half of the population in urban areas. (Page 38) 流行病可以消灭居住在城市的多达一半的人口。 wipe out 彻底毁灭 They have wiped out the enemy������ s major military targets. 他们已彻底摧毁了敌人的主要军事目标。 The storm wiped the building out in two hours. 在两个小时内, 暴风雨把那座建筑物毁坏了。
⑤—I have got a headache. —No wonder. You A. work B. are working C. have been working D. worked 提示: 用现在完成进行时表示一直在进行, 有可能还会继续进行下去的 动作。 答案: C in front of that computer too long.
I called Hannah many times yesterday evening, but I couldn������ t get through. Her brother A. was talking B. has been talking C. has talked D. talked 提示: 句意: “ 昨晚我给汉娜打过好多次电话, 但一直没打通。她弟弟当时 一直在打电话。” talk 的动作发生在过去, 故排除 B、C 两项; 进行时可以 表示一种感情色彩, 此处有埋怨的意思。 答案: A ④(2011 北京高考, 23)Tom months. A. works B. worked C. has been working D. had been working 提示: 根据时间状语“ over the last three months” 可知用现在完成时或现在 完成进行时。 答案: C in the library every night over the last three on the phone all the time.
S ect i on Ⅲ
Lesson 3 E xpl ai ned
E pi dem i cs
阅读 Lesson 3, 将下列事件按时间排序
A. One of the earliest epidemics swept through North Africa, the Middle East and Europe. B. Experts united to stop SARS spreading. C. The Spanish Flu killed up to 50 million people in 18 months. D. SARS caused 8 000 diseased and 774 killed. E. The reasons of “ The Black Death” in the 1330������ s in Asia. 答案：AECDB
2)prohibit vt. 禁止; 妨碍; 阻止 Smoking is strictly prohibited in the process of handling explosive materials. 在处理易爆物时, 严禁吸烟。 The high cost of the machine prohibits it from being widespread. 这机器成本高, 很难普及使用。 You must remember that this law prohibits driving after drinking. 你一定要记住, 这条法律禁止酒后驾驶。 The high price of equipment prohibits many people from taking up this sport. 昂贵的装备令许多人对这项运动望而却步。
wipe sth. away/ off/ up 抹掉; 擦干净 wipe sth. from/ off sth. 从某处擦掉某物
完成句子 ①用那块布把脏东西擦掉。 Use that cloth 答案: to wipe ②你永远不能把过去一笔勾销。 You can never 答案: wipe out the past. up the mess.
单项填空 ①—Have you posted the letter for me? —Sorry, I A. deal; will come B. was dealing; come C. have dealt; have come D. have been dealing; am coming 提示: 从第一句话和后面的 my work at hand 可知, 这里指“ 我” 一直在处 理手头上的工作, 故第一个空用现在完成进行时; 第二个空用现在进行 时表将来。 答案: D ②I won������ t tell the student the answer to the math problem until he it for more than an hour. A. has been working B. will have worked C. will have been working D. had work 提示: 句意: “ 直到这位学生计算此数学题超过一小时我才会告诉他答 案。” 主句为一般将来时, 时间/ 条件/ 让步状语从句的谓语动词用现在时 表将来。 答案: A on with my work at hand. I to that.
版高中英语北师大版选修7课件：Unit+21+Human+Biology
Make Friends With Fresh Air Not only does escaping into the fresh air give you a break from all those germs circulating inside，but going for a stroll can actually boost your immunity. Relaxation Fights Off Colds Being stressed will increase your susceptibility to catching a cold.That may be because，over the long term，it leads to the ongoing release of stress hormones (荷尔蒙)，such as glucocorticoids(粮皮质激素)．
单
元 话
Unit 21 Human Biology
题
导
读
众所周知，疾病总是困扰我们的健康，有些秘诀可以帮助我们保持健康。 Four Secrets To Never Getting Sick
Ever wonder why you always seem to come down with a life interrupting virus this time of year，while other women you know sail through the seasons sniffle-free，cough-free，and ache-free?
touch something with our hands. 2.By touch.
北师大版高中英语选修7Unit21Human Biology教案
Unit21 Human Biology Teaching aims1.words and phrases2.to write a discursive essay3.to practise using linking words and phrases4.to listen to and understand a TV panel discussion5.to finish the exercises about the text6.pronunciationTeaching timeTwo periodsTeaching processStep 1 Revision1.dictation2.check the homework exercisesStep 2 new words learning1.ask some students to read the new words first and correct their pronunciation2.play the tape and have them read after the tape.Step 3 writing1.exercise 1a)ask students to read the given words and expressions in exercise 1 first .b)read the instructions and the example sentence to the class.c)ask some students do exercise 1 on blackboard2.exercise 2a)give students a few minutes to read the text and do the exerciseb)check their answers3.exercise 3a)students do the exercise individuallyb)check their answers by having individuals read out the sentences.step 4 listening:a TV programme1.exercise 1a)read out the types of programme to the class.make sure that they understand what they are.b)look at the picture,let students guess what type of programme this is.2.exercise 2a)listen to the cassette for students to check their answer to exercise1.b)play the tape again,let students put these topics in the order they are mentioned.3.exercise 3a)let students read the sentences firstb)play the cassette twice for them to complete the sentence.c)check their answersstep 5 pronunciation:exercise 41.give students a few minutes to read through the sentences and the option answers2.play the tape twice for students to listen and choose the correct meaning.3.check the answersstep 6 speaking:a discussion1.exercise 1,read out the instructions to the class first. then play the cassette twice for students to decide what Tom’s and Jan’s opinions are.2.exercise 2a)let students read through the words and colloquial expressions.b)play the tape twice for students to match the words and expressions3.exercise 3,students do the exercise in pairs, then check their answers.step 7 homeworkexercise 2 on page 87。
北师大高中英语选修七配套课件：Unit 21 Human Biology
▪ These problems are more widely recognised these days and as a result，extreme or unusual
diets are less likely to be encouraged by doctors.Instead，the focus is turned toward healthy and balanced eating，and toward
attitudes.A new idea—the concept of “healthy
weight”—has come to replace the concept of the “ideal weight”．Included in this new concept is
a better understanding of the variety of human
a stage. ▪ ②It is bad manners to leave others waiting so
long. ▪ ③Are you likely to be in London this year?
Hale Waihona Puke ▪ 2．翻译佳句▪ 翻译画线句子。
▪ 【答案】更确切地说，帮助他们建立自信， 鼓励他们过一种健康的生活方式更有可能起 到积极的效果。
is crucially important that health becomes
people's focus.In a world full of fake images and unrealistic role－models，it's easy to forget that our bodies are not just something to look at—
高中英语北师大版高二下册选修七《unit 21 human biology》课件
单词 rob(robbed,robbed)
steal(stole,stolen)
辨析 宾语是被抢劫的人或地点,抢劫的物品由of引出,即rob sb./sp. of sth. 宾语为偷窃的物品,常用搭配为steal sth. from sb./sp.
6.decline v.减少,衰退;谢绝 n.衰退;减少 教材原句 ①...it is generally agreed that a patient's chances of recovery decline the longer they stay in a coma.
一句多译 很多人反对在这里建工厂。 ④Many people opposed building a factory here.(oppose) ⑤Many people were opposed to building a factory here.(opposed) ⑥Many people objected to building a factory here.(object) ⑦Many people were against building a factory here.(against)
单句填空 ②Half an hour later, she sought out her friend in the crowd. ③The new graduate is seeking for a job where he is badly wanted. ④You should seek advice from your lawyer on this matter.
4.faith n.信任;宗教信仰;信心 教材原句 ①With all the international effort being made, we have to have faith that there will be solutions in time to stop a Bird Flu epidemic in its tracks.
北师版选修7Unit 21 Human Biology
Eating Spinach Makes You Mentally SharpWhile Popeye ate spinach1 every day to maintain strong muscles，he was also bettering his memory，maybe without even knowing it.Consuming just a daily serving of spinach—or any type of leafy green，for that matter—may help slow the process of age－associated cognitive decline2，according to a new study.The reason？Vitamin K.A group of researchers at Rush University in Chicago who analyzed the diets and mental functions of 954 elderly people over a five－year period found that those who ate more greens in their diets were more likely to be mentally sharp.The researchers tracked the diets of participants，whose age averaged 81，for an average of five years.They found that people who ate one or two daily portions of green leafy vegetables had the same cognitive abilities as someone 11 years younger who never consumed leafy greens.“No other studies have looked at vitamin K in relation to change in cognitive abilities over time，and only a limited number of studies have found some association with lutein3，” said Martha Clare Morris，Sc.D.，assistant provost for community research at Rush University Medical Center and the leader of the study's research team.The team believes that other foods high in these nutrients，like asparagus4 andcarrots could provide the same benefits as the darker greens，and they intend to expand their research to explore this possibility.The research holds promise of a brain booster5that is accessible and affordable.“Since declining cognitive ability is central to Alzheimer's disease and dementia，increasing consumption of green leafy vegetables could offer a very simple，affordable and non－invasive6 way of potentially protecting your brain from Alzheimer's disease and dementia，” Morris said.Notes1．spinach n．菠菜2．cognitive decline 认知衰退3．lutein n．叶黄素4．asparagus n．芦笋5．booster n．助推器，辅助药剂6．non－invasive adj.非侵入的TaskWhich of the following is FALSE according to the passage?A．Vitamin K may help slow the process of age－associated cognitive decline.B．The researchers tracked the diets of participants for an average of five years.C．Only a limited number of studies have found lutein has the same function as vitamin K.D．The team believes carrots could provide the same benefits as the darker greens.答案 C。
21 Human Biology精讲课件 北师大版选修7课件
seek to do sth.试图做某事
seek out找出，挑出 seek sth.from sb.向某人征求某事 seek one's fortune寻找财富
高考总复习•英语（北师大版）
完成下列句子。
(1)He understands nothing，nor does he ________ (弄懂)．
答案： (1)We postponed the match because of the rain.
(2)Let's postpone making a decision until we have more information. (3)The match was postponed for half an hour because of the conflict of players of the two sides. (4)The meeting is postponed until next week.
(4)is opposing
高考总复习•英语（北师大版） 6．cater v．满足；迎合 ►归纳拓展 cater for sth./sb.迎合 cater to sth.满足某种需要
高考总复习•英语（北师大版）
完成下列句子。
(1)电视需要迎合各种不同的口味。 TV must________ many different tastes. (2)我们必须满足客户的需求。 ____________ the needs of customers. 答案： (1)cater for (2)We must cater to
高考总复习•英语（北师大版） 答案：(1)tolerate smoking in the library (2)I cannot tolerate your rudeness.
北师大版高中英语选修七 Unit 21 Human Biology 教案设计
Unit 21 HUMAN BIOLOGY 教案Teaching Plan For Unit 21 Warm Up教案Objectives1. Draw student’s attention to the unit objectives .2. To practice using the vocabulary of parts of the bodyTeaching aids : computer , projectorTeaching difficulties:To recognize and practice using the vocabulary of parts of the body Teaching procedures:Step 1 To learn the unit objectivesStep 2 Key words study1. Look at some statements and decide which part of the body is described .2. Look at the pictures and tell which parts of the body they are .3. Find six key words to label the parts of the body in the diagramStep 3 Test Y our Body MachineTest the students memory and heart function .Ask the students to work in pairs .Step 4 Do You Look After YourselfAsk the students to do a questionnaire to check whether they look after thems elves .Ask the students to work in pairs .Unit 21 Human BiologyLesson 1 Super AthletesGrammar : Conditionals Revision1．条件句有两类，一类是真实条件句，一类是虚拟条件句。
高中英语北师大版选修7教案-Unit21_Human_Biology_教学设计_教案
教学准备1. 教学目标Some believe that human cloning is a good thing. Firstly。
think if people had too much work to do , they could get their own cloneto help them.2. 教学重点/难点Some believe that human cloning is a good thing. Firstly。
think if people had too much work to do , they could get their own cloneto help them。
3. 教学用具4. 标签教学过程导学案Discursive essay——discussion reportAfter a discussion, we will write a report to show people’s different ______________ about the topic and give some examples/materials to____________ them.Task 1：Read the passage to match the heading with the paragraphsWe have a heated discussion in our class about whether it is good or not to have human cloning. Opinions are divided.Some believe that human cloning is a good thing. Firstly, They think if people had too much work to do , they could get their own clone to help them. That wouldn’t be cheating because it would still be themselves doing the work. As a result, they would have so much time to rest and have fun. What’s more, human cloning could alsosolve the problem of finding the organs for organ transplants. Sothat it could help people lead longer and healthier lives.However, others are against it .They think human cloning is a terrible idea, which could cause a lot of problems. First of all, it could cause family confusion. If people were cloned , how could their clone fit into their family? Remember, their clone would be exactly like them. In addition, clone could cause problem for society. If everyone decided to be cloned there would be a population of explosion.In my opinion, I ’d prefer to have human cloning . In that case, we can clone people with special talents that would be helpful for social development.People are against the human cloning and the argument Paragraph 1Writer’s opinion about thetopic Paragraph 2People are for the human cloning and theargument Paragraph 3Introduction of thetopic Paragraph 4Task 2：Read the passage to fill in the formTask 3：find out topic sentences in each paragraph.Paragraph 1 Topic sentence________________________________________________________________1)______________________________________________________________2) _____________________________________________________________3)______________________________________________________________Opinions _____ whether we choose to be treated by Chinese traditional Medicine _____________________.（人们关于是否选择使用中药治疗的看法不同）。
北师大高中英语选修七英语Unit21《HumanBiology》课件
4.chances of recovery ( )
1.conclusion
(D)
2.what doctors know and don’t know
about comas
( B)
3.introduction of the topic ( A )
4.chances of recovery ( C )
years have never returned to their former mental state.
C
Even in less severe cases, doctors admit that they don’t know if
or how well patients will progress. When there is a minimum of
Exercise 1
Look at the picture. What kind of programme do you think it is ?
a chat show a documentary
√ a panel discussion
a game show
Exercise 2
Listen and check your answer to Exercise 1. Then put these topics in the order they are mentioned.
patients recover slowly(5)
others show little or no
progress over a period of years.(6)
treatment,they
may never return to normal.
(教师用书)高中英语 Unit 21 Human Biology教案 北师大版选修7
Unit 21 Human Biology【美文阅读】Nearly third of children globally are couch potatoesAmerican children aren't the only couch potatoes with nearly one third of children globally spending three hoursa day or more watching TV or on computers，according to a study of over 70,000teens in 34 nations.From Argentina to Zambia，Regina Guthold of the World Health Organization inGeneva and her colleagues found most children aren't getting enough exercise andit made no difference if they lived in a rich or a poor country.“With regards to physical activity levels，we did not find much of a differencebetween poor and rich countries，”Guthold said.“Growing up in a poor country does not necessarily mean that kids get morephysical activity.”They study looked at 72,845 schoolchildren aged 13 to 15 from North and South America，Asia，Europe，and the Middle East.The children were surveyed between 2003 and 2007.The researchers defined adequate physical activity as at least an hour of exercise outside of gym class at least five days a week.Children who spent three or more hours a day watching TV，playing computer games，or chatting with friends－aside from time in school or time spent doing homework－were classified as sedentary(惯于久坐)．The researchers found only one quarter of the boys and 15 percent of the girls were getting enough exercise by these definitions.A quarter of boys and nearly 30 percent of girls were sedentary and didn't get enough exercise with girls less active than boys in every country aside from Zambia.Uruguay had the highest percentage of active boys，at 42 percent，while Zambia had the lowest，at 8 percent.Girls from India were the most active，with 37 percent meeting exercise recommendations，while girls from Egypt were the least active，with just 4 percent getting adequate exercise.Children in Myanmar(缅甸)were the least sedentary，with 13 percent of boys and 8 percent of girls classified as sedentary.The most sedentary nations were the Cayman Islands(开曼群岛)，with 58 percent of boys and 64 percent of girls spending at least three hours a day in sedentary activities.While the study didn't look at the reasons behind the lack of physical activity in various nations，Guthold speculated(推测)that urbanization could be a factor as well as access to cars and TVs.【诱思导学】1．What is the meaning of couch potatoes?2．What leads to the children's lack of physical activity?【答案】 1.Couch potatoes mean some people who spend most of his or her free time sitting or lying on a couch，watching TV，and it means that they are lazy.2．Urbanization could be a factor as well as access to cars and TVs.Period ⅠPreviewing(教师用书独具)●教学目标本课时主要是通过学生对学案所给出的内容的学习，了解本课文中所出现的词汇，初步了解课文以及相关的背景知识，对下一堂课就课文的全面理解起到一个铺垫作用。