课件14张PPT。Unit 2 Cloning 单 元 目 标 锁 定话 题 背 景 链 接In the movie Jurassic Park, scientists clone dinosaurs by using the DNA that was preserved for millions of years.However, there is trouble when the cloned dinosaurs turn out fiercer and smarter than expected.Can dinosaurs really be cloned? Theoretically, they can; all that would be required is DNA from an extinct dinosaur and a currently living closely related species which would act as a surrogate mother (代孕母亲)．In fact, there is continuing research to clone the Woolly Mammoth by extracting (提取) the DNA from frozen animals.Actually, cloning is a phenomenon that occurs naturally in a wide variety of species.Whenever you see a pair of identical twins, they are examples of nature's clones.Although scientists have been cloning certain plants like the carrot quite successfully for decades, attempts at cloning animals have not been as successful.However, they began long before the birth of Dolly, the sheep—the first mammal to be successfully cloned.
Cloning humans does give rise to some misgivings,_raising a number of moral problems involved.In fact, the social influences of producing humans artificially were brilliantly explored in the famous novel Brave New World by Aldous Huxley, and also in the movie The Island.Human cloning is basically about creating a genetically (基因地) identical copy of a previously existing person.Why would some people choose to clone human beings？Well, generally, it could make couples unable to have babies have their own children.Replacing a dead child is also another reason why some people have expressed interest in the technology.
文章大意：本文是说明文。介绍了克隆的相关情况。1．The purpose of the first paragraph is to __________.
A．give us an introduction to a movie
B．analyse the possibility of cloning
C．give an introduction to the text
D．tell us the importance of cloning
解析：推理判断题。从后文内容可知，第一段主要是为了引出下文。C2．In what way is human cloning useful？__________
A．It can bring a dead person back to life.
B．It makes it possible to replace a dead child.
C．It can help cure some human diseases.
D．It can help people have more healthy children.
解析：细节理解题。从最后一段可知，克隆人可以替代一个死了的孩子或者帮助不孕夫妻受孕。B3．What does the underlined word“misgivings” in the third paragraph mean？__________
A．Worries. B．Aims.
C．Regulations. D．Principles.
解析：词义猜测题。从该词后的“raising a number of moral problems involved”可知，克隆人引起了很多担忧。A4．What attitude do people have towards human cloning？__________
A．They think human cloning is useless.
B．They believe it can help humans in many ways.
C．They believe it can cause many moral problems.
D．They doubt whether it can succeed or not.
解析：细节理解题。从第三段可知，克隆人一直是一个存在争议的问题，涉及很多道德问题。C课件26张PPT。Unit 2 Cloning 单元重点知识回顾 Ⅰ.重点单词
1．__________vi. 不同；相异
(1)differ __________ 与……不同
differ __________ 在……方面不同
differ __________sb.on/about/over sth.
与某人在某事上意见不同
(2)be __________from 不同于differ from in with different (3)make a/no __________(to)
(对……)有/无关系
(影响、作用)
tell the ___________________________________
说出……和……的区别
2．__________adj. 精确的；准确的
__________adv. 精确地difference difference between...and... exact exactly 3．__________n. 双胞胎之一；孪生儿之一
adj. 成对的，成双的
4．_______________adj. 简单的；直接的；坦率的
5．__________vt. (undertook；undertaken)
着手；从事；承担
________________sth. 答应/保证做某事
__________that... 保证……
_____________________________ 承担责任/任务twin straightforward undertake undertake to do undertake undertake responsibility/a task 6．________________n. 突破
__________________ 取得突破
7．__________n. 程序；步骤；手续
8．__________vt. (cast；cast)扔；投；掷
9．__________adv. 总共；完全地
10．__________n. 改正；纠正；修正
__________vt. 改正，纠正
11．__________vi. 反对；不赞成
(1)__________(sb./sth.) 反对(某人/某事)
_______________sth. 反对做某事
(2)__________n. 反对；厌恶
__________________________sth. 对……提出异议breakthrough make a breakthrough procedure cast altogether correction correct object object to object to doing objection raise an objection to 12．__________n. (pl.media)媒介；手段；工具
__________ 大众传播媒体(如电视、报纸等)
13．__________vt. 获得；赢得
______________________________
获得知识/学位
14．__________vt. 获得；到达(水平、年龄、状况等)
15．__________adj. 道德(上)的；伦理的medium the media obtain obtain knowledge/one's degree attain moral forbid accumulate accumulation 18．__________adj. 必须做的；义务的；强迫的；强制的
compulsory education 义务教育
19．__________vt. 欠(账、钱、人情等)；
归功于……
(1)_____________________ 该向某人道歉
__________ 欠某人一个人情
owe sb.sth.__________sth.＝owe sth.__________sb. for sth.
因某事欠某人某物
(2)owe...__________ ... 把……归功于……
owe__________ to sb. that... 多亏某人……
(3)__________ 因为；由于compulsory owe owe sb. an apology owe sb. a favour for to to it owing to 20．__________adv. 立刻；不久
__________ 不久之后
21．__________vi. 退休；离开
__________n. 退休
22．__________vt. 打扰
vi. 操心
n. 烦扰
(1)bother sb.__________sth.
为某事打扰或麻烦某人
bother __________ sth. 特意做某事shortly shortly after... retire retirement bother with/about to do It bothers sb. that/to do sth. 使某人苦恼的是……/做某事让人苦恼
(2)put sb. to any bother 给某人添乱
why bother 没有必要吧；何苦那么麻烦
23．__________n. 假定；设想
__________vt. 假定；假设
24．__________n. 规则；规章；法规
__________vt. 调节assumption assume regulation regulate 25．__________vi.& vt. (struck；struck/stricken)
打；撞击；罢工
n. 罢工
strike...__________... 用……敲打……
strike __________ 撞到……
____________________ 某人突然意识到……
__________________ 被……打动；深受感动strike with against It strikes sb. that... be struck by... 26．__________adj. 最初的；开始的
27．__________vt. 抵抗；对抗
(1)resist(__________)sth. 抵制(做)某事
____________________sth./can't help doing sth.
忍不住做某事
(2)__________n. 抵抗
28．__________n. 缺点；不利条件
__________n. 优点
______________________________
缺点/优点是……initial resist doing can't resist doing resistance drawback strength The drawback/strength is that... 29．__________adv. 仅；只；不过
30．__________n. 装饰
__________vt. 装饰
31．__________vt. 崇拜；爱慕；喜爱
32．__________vt. & vi. 孵出；孵卵；孵化
33．__________adj. 合情理的；讲道理的；公道的merely decoration decorate adore hatch reasonable Ⅱ.重点短语
1．__________ 得到好结果；取得成功；偿清
pay __________ sth. 付某物的钱；为某事物付出代价
pay __________ 还钱；报复
2．__________ 沮丧；不愉快
__________ 振作起来
3．______________________________________
对……有重大影响pay off for back cast down cheer up have a great impact/effect/influence on... 4．__________ 赞成；支持
be __________ 赞成
be __________ 反对
5．__________ 反对
6．_____________________
一定或注定(做)……
7．________________________
使……刻骨铭心in favour of for against object to (be) bound to (do)．.. strike...into one's heart 8．______________________ 不时；偶尔
9．____________________ 使复苏；使复活
__________________ 苏醒
come to life 复活；复苏
bring back to health 使恢复健康
10．__________ 白费力气；枉费心机
11．__________________
状况很好(坏)；情况很好(坏)
__________ condition 健康状况欠佳from time to time bring back to life come to oneself in vain in good/poor condition out of working/living __________
工作/生活环境
_________________________ 在……条件下；倘若……
_________________ 一点也不；决不(放在句首时，用部分倒装语序)conditions on condition (that)．.. on no condition Ⅲ.重点句型
1．while表对比转折
Cloning plants is straightforward while cloning animals is very complicated.
仿写：汤姆很擅长理科，而他的弟弟绝对是不可救药。
_________________________________，his brother is absolutely hopeless.
2．完全倒装
Then came the disturbing news that Dolly had become seriously ill.
仿写：接着传来了屠呦呦——中国的一位女科学家，获得诺贝尔奖的令人兴奋的消息。
_____________________________ Tu Youyou，a Chinese woman scientist，won the Nobel Prize.While Tom's very good at science Then came the exciting news that 3．be＋adj.＋to do结构
Although at present human egg cells and embryos needed for cloning research are difficult to obtain...
仿写：专家认为，人类在火星上生活是很艰难的，因为得面对极冷的天气、孤独还有恐惧。
Experts think that ______________________________ on the Mars，because they will face the bitter cold weather，loneliness and fear.it is tough for human beings to live 4．形容词作状语
Did she die young because she was a clone?
仿写：令所有人吃惊的是，失踪的孩子安然无恙地回来了。
To everyone's surprise，the missing child came back _______________.
5．with复合结构
Diversity in a group means having animals with their genes arranged in different ways.
仿写：按合理的方式整理好这些图书后，她下班回家了。
________________________________________，she went home from work.safe and sound With the books arranged in a reasonable way 6．The advantage is that...优势是……
The advantage is that if there is a new illness some of these animals may die，but others will survive and pass on the ability to resist that disease to the next generation.
仿写：骑自行车上班的优势是我们可以过一种低碳生活。
___________________________________ we can live a low-carbon life.The advantage of cycling to work is that Ⅳ.话题写作
根据要求运用本单元所学知识完成下面小作文，并背诵成文。
1．约翰跟他的双胞胎妹妹性格不同。(differ)
2．他总是很乐观，而他妹妹却时不时地感到很沮丧。(from time to time；cast down)
3．一天他想和他妹妹修一辆状况很差的二手车，但他妹妹却不许他干这活。(in poor condition；forbid；undertake)
4．她希望他不要拿这样的事情来烦她。(bother)
5．但她抵制不了他想尝试一下的欲望。(resist)
6．他突然想到应该找朋友帮忙。(strike)7．他的朋友非常支持他的想法。(favour)
8．他们的努力最后得到了回报。(pay off)
9．然后传来消息说车已经修好了。(完全倒装结构)
10．他把他的成功归功于朋友的帮助。(owe)John differs in character with his twin sister. He is always very optimistic while his sister feels cast down from time to time. One day he wanted to repair a second－hand car in poor condition with his sister but she forbade him to undertake such a task, hoping that he shouldn't bother her with this kind of thing.But she couldn't resist his desire to have a try. It struck him that he should turn to his friends for help who were in favour of his idea.Their efforts paid off at last.And then came the news that the car was repaired successfully.He owed his success to his friends' help.
