人教 版高中英语 选修8 Unit 2 Cloning Using Language 课件（共37张PPT）
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| 名称 | 人教 版高中英语 选修8 Unit 2 Cloning Using Language 课件（共37张PPT） |  | |
| 格式 | zip | ||
| 文件大小 | 1.1MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（新课程标准） | ||
| 科目 | 英语 | ||
| 更新时间 | 2019-05-16 17:00:12 | ||
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课件37张PPT。The return of the dinosaurs ?231、掌握本课重点难点的单词，短语和句式。
2、使学生对克隆技术知识有基本的了解，并且对于克隆技术的发展形成自己的认识。
本课首先通过画面展示，来了解自克隆技术的诞生以来的克隆成果，，由此引出本课的话题 一 克隆会让恐龙回来吗？然后利用各种不同类型的练习形式，通过略读，快读，精读的不同步骤，让学生对于文章形成深刻的理解和掌握。
在讲解本课的过程时，通过生动的画面显示，引导出学生的无限想象力，丰富的习题形式将会大大地巩固对于生词的理解和难点句式的把握，而且对于克隆技术的发展有了一个更明确的认识。
????克隆技术大事记 1938年:德国科学家首次提出克隆想法。
1952年:科学家开始用青蛙进行克隆实验。
1970年:克隆青蛙实验取得突破,青蛙卵发育成了蝌蚪, 但是在开始进食以后死亡。1981年:科学家进行克隆鼠实验,据称用鼠胚胎细胞培育出了正常的鼠。
1984年:第一只胚胎克隆羊诞生。
1997年2月24日:英国罗斯林研究所宣布克隆羊培育成功。科学家用取自一只6岁成年羊的乳腺细胞培育成功一只克隆羊。 1998年2月23日:英国PPL医疗公司宣布,该公司克隆出一头牛犊“杰弗逊先生”。
1998年7月5日:日本科学家宣布,他们利用成年动物体细胞克隆的两头牛犊诞生。1998年7月22日:科学家采用一种新克隆技术,用成年鼠的体细胞成功地培育出了第三代共50多只克隆鼠,这是人类第一次用克隆动物克隆出克隆动物。
1999年5月31日:美国夏威夷大学的科学家,利用成年体细胞克隆出第一只雄性老鼠。 1999年6月17日:以美藉华人科学家杨向中为首的研究小组利用一头13岁高龄的母牛耳朵上取出的细胞克隆出小牛。
2000年1月3日:美国著名华人杨向中,用体外长期培养后的公牛耳皮细胞成功克隆出6头牛犊。 2000年1月:美国科学家宣布克隆猴成功,这只恒河猴被命名“泰特拉”。
2000年3月14日:曾参与克隆小羊“多利”的英国PPL公司宣布,他们成功培育出5头克隆猪。Please enjoy some pictures about dinosaurs. 霸王龙tyrannosaurus剑龙stegosaurs角龙 ceratopsids雷龙 brontosaurus翼龙pterodactylMore animals that have been extinct on the earth . Great Auk (1844)Auroch (1627)Dodo bird (1755)Quagga (1883)Answer the following questions: 1. Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group?
2.Why is it wrong to clone an extinct animal if it would have to live in a zoo?
3.Why can’t you clone the DNA of animals that have been extinct longer than 10,000 years? Reading1. Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group? Keys: There will not be enough genetic variation in the group to be able to resist new illnesses. 2. Why is it wrong to clone an extinct
animal if it would have to live in a zoo?
Because it is not a suitable habitat to develop and increase its numbers. The zoo is not a natural environment for a wild animal.3. Why can’t you clone the DNA of animals that have been extinct longer than 10,000 years?
The DNA of animals more than 10,000 years old is not suitable for cloning, for it can’t survive so long.1. The film Jurassic Park is popular because _____.
A. people are interested in the subject of cloning
B. all the actors are dinosaurs
C. it was directed by a scientist who clones dinosaurs
D. it proves very interesting细枝末节2. We can infer from the text that____
A. scientists are experimenting to clone dinosaurs
B. dinosaurs will never return to the earth
C. cloned animals will only live in the zoo
D. the DNA of dinosaurs can only survive 10 000 year推理判断3.The writer of the text_____
A. is excited by the possibility of cloning fierce and extinct animals
B. believes that extinct animals can be brought back to life by cloning
C. thinks it impossible or unsuitable to clone extinct animals like dinosaurs
D. dreams of dinosaurs returning to the earth主旨大意The popularity of the film Jurassic Park, in which a scientist clones several different kinds of extinct dinosaurs, proves how the idea struck a mixture of fear and excitement into people’s hearts. 长句难句in which引导定语从句,先行词the film Jurassic Park， in which合起来做类似地点的状语， how引导宾语从句，使用陈述句语序，做prove的宾语
电影
《侏罗纪公园》的欢迎证实了普通人对这一话题是多么感兴趣,在该电影中一位科学家克隆了几种不同的恐龙。
2. From time to time people suggest that the animals that have disappeared from the earth, like dinosaurs, can possibly be brought back to life through cloning. from time to time有时, 间或, 偶尔,
= occasionally, now and then。主干成分people suggest that the animals can be brought back to life
that have disappeared from the earth 是定语从句，修饰 the animals ， like dinosaurs介词短语修饰the animals ， through cloning. 介词短语表示方式
人们时常设想从地球上消失的动物,例如恐龙,有可能通过克隆技术使它们复活。
Language points strike v.n struck, struck
1)撞；碰；撞击；碰撞
She fell, striking her head against the side of the boat.
她摔倒时头撞在船舷上。
2)击打，踢(球等)
He struck the ball into the back of the net.
他射出的球直入网底。
3)(想法，念头)突然想到；一下子想起；猛地意识到
An idea suddenly struck me.
我心中忽然产生了一个念头。
4)～sb(as sth)给(某人以……)印象；让(某人)觉得
5)(疾病，灾难)侵袭；爆发
The area was struck/hit by an outbreak of cholera.
那一地区爆发了霍乱。
6)(钟)敲，鸣，报时
The clock struck nine.
钟敲了九下。
7)罢工
The workers were striking because they wanted more money.
工人们在罢工，因为他们要求增加工资。
8)擦，划(火柴)；击出火星
The matches were damp and he couldn't make them strike.
火柴受潮了，他划不着。
【知识拓展】
1)be struck by/on/with sb/sth 被某人(或某物)打动；迷恋某人(或某物)
I was struck by her beauty.
她的美貌给我留下了深刻的印象。
2)on the strike 罢工；处于工作停顿状态的
Most of the employees were on strike.
许多雇员在罢工。
3)strike...into one's heart 使……刻骨铭心
The ghost story struck fear into the hearts of the children.
那个鬼故事使孩子们心惊肉跳。
4)It strikes me that... 我觉得……； 我的印象是……
It suddenly struck me that we ought to make a new plan.
我突然想到， 我们应该制订一个新的方案。
5)Strike while the iron is hot. 趁热打铁
He should strike while the iron is hot.
他应该趁热打铁。
【词语辨析】
strike, hit, beat, knock
这些动词均含有“打”之意。
1)strike普通用词，多指急速或突然一次猛击。
I've struck my foot on a stone.
我把脚踢在石头上了。
2)hit普通用词，比较口语化，常与strike换用，侧重有目标的猛击，强调用力击中。
The stone hit the window.
石头打中了窗户。
3)beat普通用词，含义广泛，指连续打击。游戏、竞赛或战争中作 “打败”解。
The rain was beating against the window.
雨击打在窗上。
4)knock 侧重用拳头或硬物敲打。
As the man came near, the prisoner knocked him to the ground with a sharp blow.
当这个人走近时，战俘猛地一拳将他打翻在地。
resist(v.)
1)抵制；阻挡
They are determined to resist pressure to change the law.
他们决心顶住要求改革法律的呼声。
2)反抗；回击；抵抗
If the enemy continue to resist, wipe them out.
如果敌人继续抵抗，就把他们消灭掉。
3)(通常用于否定句)忍住；抵挡
I was unable to resist laughing.
我忍不住笑了。
4)使不受……的伤害；抗(伤害)
A healthy body resists disease.
健康的身体能抵御疾病。
2、使学生对克隆技术知识有基本的了解，并且对于克隆技术的发展形成自己的认识。
本课首先通过画面展示，来了解自克隆技术的诞生以来的克隆成果，，由此引出本课的话题 一 克隆会让恐龙回来吗？然后利用各种不同类型的练习形式，通过略读，快读，精读的不同步骤，让学生对于文章形成深刻的理解和掌握。
在讲解本课的过程时，通过生动的画面显示，引导出学生的无限想象力，丰富的习题形式将会大大地巩固对于生词的理解和难点句式的把握，而且对于克隆技术的发展有了一个更明确的认识。
????克隆技术大事记 1938年:德国科学家首次提出克隆想法。
1952年:科学家开始用青蛙进行克隆实验。
1970年:克隆青蛙实验取得突破,青蛙卵发育成了蝌蚪, 但是在开始进食以后死亡。1981年:科学家进行克隆鼠实验,据称用鼠胚胎细胞培育出了正常的鼠。
1984年:第一只胚胎克隆羊诞生。
1997年2月24日:英国罗斯林研究所宣布克隆羊培育成功。科学家用取自一只6岁成年羊的乳腺细胞培育成功一只克隆羊。 1998年2月23日:英国PPL医疗公司宣布,该公司克隆出一头牛犊“杰弗逊先生”。
1998年7月5日:日本科学家宣布,他们利用成年动物体细胞克隆的两头牛犊诞生。1998年7月22日:科学家采用一种新克隆技术,用成年鼠的体细胞成功地培育出了第三代共50多只克隆鼠,这是人类第一次用克隆动物克隆出克隆动物。
1999年5月31日:美国夏威夷大学的科学家,利用成年体细胞克隆出第一只雄性老鼠。 1999年6月17日:以美藉华人科学家杨向中为首的研究小组利用一头13岁高龄的母牛耳朵上取出的细胞克隆出小牛。
2000年1月3日:美国著名华人杨向中,用体外长期培养后的公牛耳皮细胞成功克隆出6头牛犊。 2000年1月:美国科学家宣布克隆猴成功,这只恒河猴被命名“泰特拉”。
2000年3月14日:曾参与克隆小羊“多利”的英国PPL公司宣布,他们成功培育出5头克隆猪。Please enjoy some pictures about dinosaurs. 霸王龙tyrannosaurus剑龙stegosaurs角龙 ceratopsids雷龙 brontosaurus翼龙pterodactylMore animals that have been extinct on the earth . Great Auk (1844)Auroch (1627)Dodo bird (1755)Quagga (1883)Answer the following questions: 1. Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group?
2.Why is it wrong to clone an extinct animal if it would have to live in a zoo?
3.Why can’t you clone the DNA of animals that have been extinct longer than 10,000 years? Reading1. Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group? Keys: There will not be enough genetic variation in the group to be able to resist new illnesses. 2. Why is it wrong to clone an extinct
animal if it would have to live in a zoo?
Because it is not a suitable habitat to develop and increase its numbers. The zoo is not a natural environment for a wild animal.3. Why can’t you clone the DNA of animals that have been extinct longer than 10,000 years?
The DNA of animals more than 10,000 years old is not suitable for cloning, for it can’t survive so long.1. The film Jurassic Park is popular because _____.
A. people are interested in the subject of cloning
B. all the actors are dinosaurs
C. it was directed by a scientist who clones dinosaurs
D. it proves very interesting细枝末节2. We can infer from the text that____
A. scientists are experimenting to clone dinosaurs
B. dinosaurs will never return to the earth
C. cloned animals will only live in the zoo
D. the DNA of dinosaurs can only survive 10 000 year推理判断3.The writer of the text_____
A. is excited by the possibility of cloning fierce and extinct animals
B. believes that extinct animals can be brought back to life by cloning
C. thinks it impossible or unsuitable to clone extinct animals like dinosaurs
D. dreams of dinosaurs returning to the earth主旨大意The popularity of the film Jurassic Park, in which a scientist clones several different kinds of extinct dinosaurs, proves how the idea struck a mixture of fear and excitement into people’s hearts. 长句难句in which引导定语从句,先行词the film Jurassic Park， in which合起来做类似地点的状语， how引导宾语从句，使用陈述句语序，做prove的宾语
电影
《侏罗纪公园》的欢迎证实了普通人对这一话题是多么感兴趣,在该电影中一位科学家克隆了几种不同的恐龙。
2. From time to time people suggest that the animals that have disappeared from the earth, like dinosaurs, can possibly be brought back to life through cloning. from time to time有时, 间或, 偶尔,
= occasionally, now and then。主干成分people suggest that the animals can be brought back to life
that have disappeared from the earth 是定语从句，修饰 the animals ， like dinosaurs介词短语修饰the animals ， through cloning. 介词短语表示方式
人们时常设想从地球上消失的动物,例如恐龙,有可能通过克隆技术使它们复活。
Language points strike v.n struck, struck
1)撞；碰；撞击；碰撞
She fell, striking her head against the side of the boat.
她摔倒时头撞在船舷上。
2)击打，踢(球等)
He struck the ball into the back of the net.
他射出的球直入网底。
3)(想法，念头)突然想到；一下子想起；猛地意识到
An idea suddenly struck me.
我心中忽然产生了一个念头。
4)～sb(as sth)给(某人以……)印象；让(某人)觉得
5)(疾病，灾难)侵袭；爆发
The area was struck/hit by an outbreak of cholera.
那一地区爆发了霍乱。
6)(钟)敲，鸣，报时
The clock struck nine.
钟敲了九下。
7)罢工
The workers were striking because they wanted more money.
工人们在罢工，因为他们要求增加工资。
8)擦，划(火柴)；击出火星
The matches were damp and he couldn't make them strike.
火柴受潮了，他划不着。
【知识拓展】
1)be struck by/on/with sb/sth 被某人(或某物)打动；迷恋某人(或某物)
I was struck by her beauty.
她的美貌给我留下了深刻的印象。
2)on the strike 罢工；处于工作停顿状态的
Most of the employees were on strike.
许多雇员在罢工。
3)strike...into one's heart 使……刻骨铭心
The ghost story struck fear into the hearts of the children.
那个鬼故事使孩子们心惊肉跳。
4)It strikes me that... 我觉得……； 我的印象是……
It suddenly struck me that we ought to make a new plan.
我突然想到， 我们应该制订一个新的方案。
5)Strike while the iron is hot. 趁热打铁
He should strike while the iron is hot.
他应该趁热打铁。
【词语辨析】
strike, hit, beat, knock
这些动词均含有“打”之意。
1)strike普通用词，多指急速或突然一次猛击。
I've struck my foot on a stone.
我把脚踢在石头上了。
2)hit普通用词，比较口语化，常与strike换用，侧重有目标的猛击，强调用力击中。
The stone hit the window.
石头打中了窗户。
3)beat普通用词，含义广泛，指连续打击。游戏、竞赛或战争中作 “打败”解。
The rain was beating against the window.
雨击打在窗上。
4)knock 侧重用拳头或硬物敲打。
As the man came near, the prisoner knocked him to the ground with a sharp blow.
当这个人走近时，战俘猛地一拳将他打翻在地。
resist(v.)
1)抵制；阻挡
They are determined to resist pressure to change the law.
他们决心顶住要求改革法律的呼声。
2)反抗；回击；抵抗
If the enemy continue to resist, wipe them out.
如果敌人继续抵抗，就把他们消灭掉。
3)(通常用于否定句)忍住；抵挡
I was unable to resist laughing.
我忍不住笑了。
4)使不受……的伤害；抗(伤害)
A healthy body resists disease.
健康的身体能抵御疾病。