大学英语基础教程(北大版)教案第一册Unit Six_大学英语第一册教案
大学英语基础教程(北大版)教案第一册Unit Six由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“大学英语第一册教案”。
Unit 6 Teaching Objectives:
By the end of this unit, the students will be expected to be able to 1.get to know the factors that influence the skin color of human beings and the attitudes to suntan in different times;learn the relationships between suntan and society;2.use skillfully the 10 key words and 6 expreions learned in text A in conversations and writings;3.consolidate the basic grammar on the past perfect tense 4.get to know how to write Invitation Cards and Letters of Invitation Teaching Methods: Lecture, Discuion Unit Duration: 8 cla hours(45 minutes each)Teaching procedures: I.Preparatory 1.Words And Phrases Learned In Display Opposite：entirely different, contrary相反的Invention：the act of inventing, something invented发明，创造 Bleach：cause to become white or whiter漂白，褪色
Inherit：receive property or qualities of mind or body from one’s parents or grandparents 继承，由遗传获得
Leisure：spare time, time free from work空闲 Afford：be able to buy or do提供
Desirable：worth having, doing or desiring值得要的Exposure：the state of being uncovered to the light.usu.without protection暴露 Artificially：made by the art of man人造的Indoor: belonging to, situated, inside a building 室内的 2.Expreions Learned In Display 1.tell … from…
2.brought about
3.To…extent 4.not at all
5.leads to
6.on the other hand II.Language In Context 1.Information Related To The Text In western Europe and north America pale is no longer desirable.Instead of bleaching themselves white with lemon juice, many people spend their time to get their suntan.Proper quantity of suntan is good for health, but exceive suntan may be harmful.The best known acute effect of exceive UV exposure is erythema, the familiar skin reddening termed suntan.Susceptibility to skin damage depends on skin type;individuals with fairer skin will be more prone to suntan or erythema, than people with darker skin.Similarly, the ability to adapt to UV exposure(able to tan)also depends on skin type.2.Introductory Remarks This article tells about the skin color we have got in different ways.It focuses on the relation between suntan and society.People in different periods share the different ideas about suntan.It reveals the fact that man himself is not only influenced by heredity, but also by social environment, and so are men’s ideas.As environment changes, men’s ideas change, too, and all these changes in men’s ideas are closely related to the wealth and social status.3.Language Points 1.But our weight depends mainly on how much we eat and how much esercise we get.Depend on/ upon 1)vary according to what else happens or whether something else changes 取决于……, 视…而定
The length of the treatment depends on the severity of the illne.治疗时间的长短取决于疾病的严重程度。2）need the help or support 依靠，依赖
I haven’t got a car, so I have to depend on the buses.我没有汽车，所以我得乘公共汽车。
3）be sure that something will happen 信赖，确信，相信 You can necer depend on her coming on time.绝不可指望她能准时到达。
2.In the same way, our skin color depends to a large extent on how much sunshine we get to a large extent in a higher degree 在很大程度上 I agree with what you say to a large extent.在很大程度上我同意你的话。
We can trust him to a large extent.我们可以完全信赖他。
3.A group of light-colored people will all seem to be the seme color in these months.Light-coloured adj pale and not dark 浅颜色的 “形容词（数词）+名词+ed”构成复合形容词，如 Dark-coloured 深颜色的A white-haired girl白毛女 A three-legged animal三脚兽
4.But when summer arrives and they goto the beaches, some will tan darkly, some will tan lightly and a feew will not tan at all.(not / no)at all used in questions or negative statements to emphasize what you are saying 无论如何（都不）（用于疑问句或否定句，表示强调）She is not looking at all well.(=she looks ill)她看起来气色很糟糕。
They searched the mountain over but didi not fined any hints at all.他们搜遍了整座山，但什么线索也没找到。Do you know anything about it at all? 这件事你一点都不知道吗？ Does he get no pension at all? 他一点养老金都没拿到吗？
“Do you mind if I open the window?” “Not at all!”(=certainly not, please do)” “你是否介意我开窗户？”“当然不会介意！” 5.Each one has inherited a different ability to tan…
Inherit v.receive property or qualities of mind or body from one’s parents or grand parents 继承，由遗传获得
She inherited a large amount of money from her father.她从父亲那继承了一大笔钱。A son inherits from his father.儿子是父亲的继承人。
6.Sometimes they decide the opposite.Opposite 1)n.something or someone as different as poible from another 相反 Black and white are opposites.黑白相反。
2）adj.Entirely different, contrary 相反的 His political position is opposite to ours.他的政治立场和我们的相反。
7.Noblemen, on the other hand, did not have to work.On the other hand(通常为on the one hand… on the other hand…)used when comparing different or opposite facts or ideas 一方面……., 另一方面……
On the one hand you treated her kindly;on the other hand you are rude to the whole family.一方面你对她温和，而另一方面却粗暴地对待她的家人。
8.You could always tell a nobleman from a peasant because the peasant had a tan.Tell… from… recognize , know 区别，分辨，认出 Can you tell one from the other? III.Toward Productive Language 1.Language Points 1.Scientists working on a problem do not know and sometimes can’t even gue what the final result will be.Work on spend time making or fixing something 致力于 I worked all night on that article.我通宵在写那篇文章。
Work on sb to do sth try continuously to influence someone or persuade them to do something 努力影响（说服）（某人做某事）Gue v.form an opinion without knowing猜想，推测 I gue her age as 18.我想她芳龄18.2….he was doing an experiment in his laboratoroy when her noticed something extraordinary.Experiment n.trial made in order to learn something or prove the truth of an idea 试验 The theory shall be proved by experiment.理论要经实践检验。
Extraordinay adj.more than what is ordinary, strange 非常的，特别的 His memory is quite extraordinary.他的记忆力非同寻常。
3….and when he switched on the current he saw little dancing lights on his table.Switch on turn on by means of a switch 打开，接通 Please, switch on the TV.请打开电视机。
Current n.the flow of electricity, a continuously moving ma of liquid or gas 电流，水流，气流
The current is strongest in the middle of the river.河中间水流最强。
4.Now the bulb was completely covered;how then could any ray penetrate? Penetrate v.enter, cut or force a way into or through穿过，渗透 The bullet penetrated the wall.子弹穿过了墙壁。
5.Profeor Rontgen took a piece of this paper and held it at a distance from the lamp.At a distance the amount of separation in space or time在远处 The picture looks better at a distance.离远点看，这幅画更好看。
One can see the ancient ruins at a distance of 20 miles.20英里外都能看到那些古代废墟。
6.Between it and the lamp he placed a variety of objects, a book…
A variety of a group or collection containing different sorts of the same thing or people 各种各样的This shop has a variety of toys.这家商店里有各式各样的玩具。7.this mysterious ray could shine through everything except the metal.Mysterious adj.not easily understood, secret, suggesting mystery 神秘的，难解的 He died of a mysterious illne.他死于一种未知的疾病。
8.she was veryt surprised by this request, but she obediently held up her hand for a quarter of an hour.Request v.damand politely请求，要求 May I request your attention?请大家注意了。Hold up raise, keep up举起，托起 Please hold up your right hand , if you agree.同意的，请举右手。
9．At first the doctors did not understand how powerful the rays were and many of them were injured, losing a finger…
Injure v.hurt, offend 伤害，损害 She was injured badly in the accident.她在事故中严重受伤。
10.the most obvious use for this discovery to enable doctors and surgeons to see exactly how a bone was fractured, Obvious adj.easy to understand, clear明白的，显然的 Her displeasure was obvious.她明显不快。2.Comprehension Questions 1.)Why were the doctors easy to be injured by the X-ray?
At first the doctor did not understand how powerful the rays were and many of them were injured, losing a finger or an arm through exposure to X-rays when they were using the machines.2.)Why did Profeor Roentgen not die an honored man?
Profeor Roentgen died, poor and neglected 1923.even through his discovery did so much for medical science, unfortunately he did not die an honored man, because malicious people spread the story that he had stolen his discovery from a laboratory aistant who worked for him.IV.Homework: 1.Dictation of the new words
