高中人教版英语选修8教学案：Unit 2 Section Ⅰ Warming Up Rea(2)

6．object F．to get gradually more over a period of time

7．moral G．completely; thoroughly

8．accumulate H．to feel or say that you oppose it or disapprove of it

9．obtain I．a change that makes sth. more accurate than it was before

10．correction J．get something that you want

答案：1～5BCEAG6～10HDFJI

Lead-in

1．Can you find anything in common from the two pictures below? Do you know why they look alike?

参考答案：The_two_dogs_are_alike_and_the_two_babies_are_also_alike.

They_are_examples_of_cloning._They_are_born_almost_at_the_same_time_by_the_sa me_mother.

2．Are the following clones the same? If not, what is the difference?

参考答案：No,_they_are_not_the_same._The_first_two_are_natural_clones,_the_rest_two _are_man-made_clones.

3．What do you know about Dolly the sheep?

参考答案：Dolly_the_sheep_was_the_first_mammal_to_have_been_successfully

_cloned_from_an_adult_cell._She_was_cloned_at_the_Roslin_Institute_in_Scotland_an d_lived_there_until_her_death_when_she_was_6.5._Her_birth_was_announced_on_5th_Jul y,_1996.

Fast-reading

Skim the text and choose the best answers.

1．Match the main idea of each paragraph.

(1)Para. 1A．The major uses and procedures of cloning

(2)Para. 2 B．The definition of cloning

(3)Para. 3 C．People's reaction to cloning

(4)Para. 4 D．The problems of Dolly

(5)Para. 5 E．The effect of Dolly

答案：(1)～(5)BADEC

2．What's the main idea of the text?

A．Animal cloning is very valuable and can benefit the world.

B．Animal cloning could be misused by bad people so it must be forbidden.

C．Animal cloning is well developed because Dolly the sheep was born.

D．Animal cloning raised arguments and scientists are not sure about its future.

答案：D

Careful-reading

(Ⅰ)Give a right order of cloning Dolly's procedure.

1．The cell divides and grows into an embryo.

2．The lamb is the clone of the donated cell from Sheep B.

3．A nucleus is taken out of sheep B's somatic cell.

4．The embryo is put into female sheep C.

5．The egg cell from sheep A and the nucleus from sheep B are joined using electricity. 6．The egg cell from sheep A is removed a nucleus.

答案：6—3—5—1—4—2

(Ⅱ)True (T) or False (F)．

1．Cloning means making a copy of an animal or a plant.__F__

2．Dolly the sheep was not the first successful clone of a mammal.__F__ 3．Religious leaders objected to cloning human beings.__T__

4．Clone can be from both natural clone and man-made clone.__T__

(Ⅲ)Read the text and choose the best answers.

1．Which of the following statements about cloning is NOT true according to the text? A．Cloning is something that has been developed quite recently.

B．Twins that look exactly the same are originally from the same egg.

C．Cloning is used by gardeners to make more money.

D．Animal cloning is much more difficult than plant cloning.

2．The procedure of the cloning of Dolly the sheep is concerned about ________ sheep. A．1B．2

C．3 D．4

3．The sheep that donated the somatic cell most probably lived ________ years.

A．3 B．6

C．9 D．12

4．The lamb is the clone of the cell from sheep B because ________.

A．it provides the egg cell B．it gives birth to the lamb

C．it provides the nucleus D．it is a female sheep

5．We can infer from the last three paragraphs that ________.

A．the normal development of Dolly had no effect on the cloning of other species

B．Dolly's serious disease and final death disturbed the whole world

C．Dolly successfully cloned a new lamb with the help of cloning scientists

D．there were arguments about animal cloning and concerns about the future of cloning 6．What about the writer's attitude towards cloning in the text?

A．The writer is against cloning.

B．The writer is in favour of cloning.

C．The writer does not state any personal opinion about cloning.

D．The writer is in agreement about cloning.

答案：1～6ACDCDC

Study-reading

Analyze the following difficult sentences in the text.

1．It also happens in animals when twins identical in sex and appearance are produced from the same original egg.

[句式分析]

[尝试翻译]这种现象也发生在动物身上，从同一个原生卵子产生性别和相貌相同的双胞胎也是克隆。

2．Cloning plants is straightforward while cloning animals is very complicated.

[句式分析]Cloning plants和cloning animals在句中都充当主从句的主语；while意为“而，然而，却”，是并列连词在句中起对比、比较的作用。

[尝试翻译]克隆植物简单，但克隆动物就非常复杂了。

3．Then came the disturbing news that Dolly had become seriously ill.

[句式分析]

[尝试翻译]接着传来了多莉病重的坏消息。

4．Although at present human egg cells and embryos needed for cloning research are difficult to obtain, newspapers wrote of evil leaders hoping to clone themselves to attain their ambitions.

[句式分析]

[尝试翻译]尽管目前供克隆研究的人类卵细胞和胚胎很难获得，报纸上报道说，有些邪恶的头目希望把自己克隆出来以实现他们的野心。

Ⅰ.阅读理解

A

Authors Kyle Kurpinski and Terry D．Johnson pretty much have me convinced that human cloning is quite possible and is a future certainty. Kurpinski and Johnson are both bioengineering experts; unlike similar scientists you have seen in the movies, they both have a sense of humor. What surprises me is that Kurpinski and Johnson are able to take something as complicated as DNA and make it understandable.

The book Ho w toDefeatYourO w nClone teaches us what is now

known as DNA-encoded (编码), how that happens, and why people with

similar DNA don't look or act the same. The book not only helps us get a

basic understanding of what DNA and its purp …… 此处隐藏：5123字，全部文档内容请下载后查看。喜欢就下载吧 ……