Five cloned pigs，whose organs are much less likely to be rejected(排斥) by a patient，have been born in the U．S.
More than 62,000 people in the U．S. alone are waiting to ____ donated hearts，lungs and so on.The number of human donors falls far short of ____.Pig organs are of a(n) ____ size to human organs，and some scientists hope they might be used to help meet the ____.But previous attempts to transplant pig tissue into humans have ____.
The five pigs ____ a gene that adds a sugar to the surface of pig cells.The sugar would ____ immune(免疫的) rejection of the tissue.“This advance provides a near?time ____ for overcoming the problem that there is not enough human organs for transplants，”says an expert.“This is the ____ gene for overcoming the ____ stage of rejection.”
____，scientists warn that much more work is necessary ____ organs from copies of the pigs could be transplanted into humans.Human genes will need to be added，to ____ rejection of the organ in the long term.There are also ____ that pig viruses could infect patients.
Cloning techniques were ____ to the production of the pigs.Genes can only be knocked out(去除) in a single cell.Cloning of these single cells then allowed the ____ of a whole animal in which the gene was knocked out in every cell.But the PPL researchers have ____ in knocking out only one copy of the gene.The team will now attempt to knock out both copies of the gene.
The team will also ____ tests to investigate whether a virus from the pigs could infect human cells.“Although a lot of the work is very ____，we’re still very far off being able to grow an organ，” says Julia，who is working on this project and quite ____ to creating similar knock?out pigs with researchers at the University of Missouri.
1.A.exchange? B．check
C．possess? D．receive
2.A.discussion? B．demand
C．doubt? D．distance
3.A.beneficial? B．identical
C．similar? D．certain
4.A.shortage? B．condition
C．satisfaction? D．argument
5.A.continued? B．failed
C．finished? D．paused
6.A.lack? B．include
C．make? D．change
7.A.leave? B．cause
C．block? D．destroy
8.A.supply? B．ambition
C．contribution? D．solution
9.A.only B．rare
C．key? D．safe
10.A.last? B．whole
C．next? D．early
11.A.However? B．Therefore
C．Besides? D．Finally
12.A.because? B．before
C．if? D．after
13.A.prevent B．ignore
C．judge? D．weaken
14.A.regrets? B．emotions
C．concerns? D．interests
15.A.simple? B．vital
C．unusual? D．basic
16.A.collection? B．application
C．reception? D．creation
17.A.delighted? B．succeeded
C．joined? D．believed
18.A.conduct? B．plan
C．design? D．study
19.A.perfect? B．strange
C．exciting? D．disappointing
20.A.opposed? B．used
C．devoted? D．suited
1.C
2.D
3.A
4.B
5.C
6.A
7.C
8.D
9.A
10.C
11.B
12.C
13.A
14.D
15.A
16.B
17.A
18.B
19.C
20.D
【解析】
1.
解析 由本段內(nèi)容可知，應(yīng)是等待接受器官的移植。
2.2】 B
解析 器官捐獻不能滿足人們的需求，demand符合語境。
3.3】 C
解析 根據(jù)上下文可知，克隆豬的器官可以被移植到人體內(nèi)，它們的器官應(yīng)該和人類的器官大小相似。
4.4】 A
解析 根據(jù)本段第二句“The number of human donors falls far short of ____.”可知，克隆豬的器官是為了彌補人類可移植器官的不足。
5.5】 B
解析 上一句提到科學(xué)家期望克隆豬的器官能夠應(yīng)用于人類器官移植領(lǐng)域，but表示轉(zhuǎn)折，說明以前類似的試驗失敗了。
6.6】 A
解析 由下文“...a gene that adds a sugar to the surface of pig cells.The sugar would ____ immune(免疫的) rejection of the tissue.”可推測，這一基因會導(dǎo)致不好的結(jié)果，又根據(jù)“‘This advance provides...’”可知，這五只克隆豬沒有這一基因，因此選lack。
7.7】 B
解析 根據(jù)上下文可知，這種糖分可能會使器官產(chǎn)生免疫排斥，cause符合語境。
8.8】 D
解析 根據(jù)后面overcoming the problem的提示，可知對人類可移植器官不足的問題提供了一個解決辦法。
9.9】 C
解析 根據(jù)上文“...a gene that adds a sugar to the surface of pig cells.”可知，這一基因?qū)朔鞴倥懦鈫栴}很關(guān)鍵，所以選key。
10.10】 D
解析 根據(jù)下一段第二句“Human genes will need to be added，to ____ rejection of the organ in the long term.”可知，對這一基因的處理只能解決器官排斥早期的一些問題。
11.11】 A
解析 根據(jù)下文“...scientists warn that much more work is necessary...”可知，本段內(nèi)容與上一段意思是轉(zhuǎn)折關(guān)系，所以用however。
12.12】 B
解析 根據(jù)下文“Human genes will need to be added...”可知，在克隆豬的器官可以移植到人體內(nèi)之前，還有很多工作要做，所以用before。
13.3】 A
解析 根據(jù)上下文可知，科學(xué)家們的這些工作是為了防止器官排斥。
14.4】 C
解析 由句意可知，豬身上的病毒可能會感染病人，這是人們所擔(dān)心的。
15.5】 B
解析 這五只豬是克隆動物，顯而易見，克隆技術(shù)對繁育出這幾只豬至關(guān)重要，vital符合語境。
16.6】 D
解析 基因的去除只有在單個細胞中才能進行，克隆這些單細胞然后再將其培育成一只完整的動物，這樣動物身上的每個細胞中的這種基因就都被去除了，creation符合語境。
17.17】 B
解析 根據(jù)下文“The team will now attempt to knock out both copies of the gene.”可知，PPL researchers已經(jīng)成功去除這種基因的一個副本。
18.8】 A
解析 句意為：這一團隊還將進行試驗研究克隆豬身上的細菌是否會感染人體。conduct tests進行試驗。
19.9】 C
解析 although表示讓步，根據(jù)主句“‘we’re still very far off being able to grow an organ，’”可知，exciting符合語境。
20.20】 C
解析 Julia致力于培育這種去除基因的克隆豬，devoted符合語境。
優(yōu)翼小幫手同步口算系列答案科目：高中英語 來源： 題型：閱讀理解
With only about 1,000 pandas left in the world, China is desperately trying to clone (克隆) the animal and save the endangered species(物種). That's a move similar to what a Texas A&M University researchers have been undertaking for the past five years in a project called “Noah's Ark”.
Noah's Ark is aimed at collecting eggs, embryos(胚胎)，semen and DNA of endangered animals and storing them in liquid nitrogen（氮）. If certain species should become extinct , Dr. Duane Kraemar, a professor in Texas A&M University Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2,000 species of mammals , birds reptiles will become extinct in over 100 years . The panda, native only to China , is in danger of becoming extinct in the next 25 years .
This week , Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit . They are now trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
“The nuclear transfer(核子移植) of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem，” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy(having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort, ”adds Kraemer, who is one of the leaders of the Project at Texas A & M, the first–ever attempt at cloning a dog.
“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”
The aim of “Noah’s Ark” project is to ________.
A. make efforts to clone the endangered pandas
B. save endangered animals from dying out
C. collect DNA of endangered animals to study
D. transfer the nuclear of one animal to another
Ａccording to Professor Kraemer , the major problem in cloning pandas would be the lack of _______.
A. available panda eggs B. host animals
C. qualified researchers D. enough money
The best title for the passage may be ______.
A. China’s Success in Panda Cloning
B. The First Cloned Panda in the World
C. Exploring the Possibility to Clone Pandas
D. China---the Native Place of Pandas Forever
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科目：高中英語 來源： 題型：閱讀理解
閱讀理解
(A)
Every object tells a story. Even the most ordinary objects can present to us powerful images. Sometimes it is the ordinary nature of these objects that actually makes them so extraordinary. Such is the case with an old leather shoe in a museum in Alaska. At first glance it does not look like much. It is a woman’s shoe of a style popular in the 1890s. But what is unique(獨特的) about this shoe is where it was found. It was discovered on the Checkout Pass, the famous trail used by the people seeking gold in Alaska. Who it belonged to or why it was left there is not known. Was it perhaps dropped by accident as the woman climbed up the 1500 stairs carved outface? Or did she throw away goods that she didn’t need in order to travel lighter?
Over 100, 000 people with “gold fever” made this trip hoping to become millionaires. Few of them understood that on their way they would have to cross a harsh wildness. Unprepared for such a dangerous journey, many died of starvation and exposure to the cold weather.
The Canadian government finally started requiring the gold seekers to bring one ton of supplies with them. This was thought to be enough for a person to survive for one year. They would carry their supplies in backpacks(背包) each weighing up to fifty pounds; it usually took at least 40 trips to get everything to the top and over the pass. Whoever dropped the shoe must have been a brave and determined woman. Perhaps she was successful and made it to Alaska. Perhaps she had to turn back in defeat. No one will ever know for sure, but what we do know is that she took part in one of the greatest adventures in the 19th century.
1. The ordinary woman’s leather shoe is considered unusual because _______.
A. it was an important clue to life in the past B. it was found on a famous trail
C. it at one time belonged to a VIP D. it was a fashionable shoe at that time
2. According to this passage, many people who went to Alaska _______.
A. eventually became millionaires B. brought with them many shoes
C. had conflicts with the Eskimos D. were not properly equipped
3. The Canadian government made gold seekers bring one year’s supplies with them so that _______.
A. they would not die of hunger and cold
B. the army would have enough food for fighting a war
C. they would change these goods with the Eskimos
D. the supplies would make Alaska rich
4. No matter what happened to the woman who owned the shoe, _______.
A. she must have lived a happy life
B. she certainly dropped the shoe on purpose
C. her adventurous spirit is definitely admired
D. her other shoes were equally fashionable
(B)
Listen carefully, working people, we would like to tell you something that could save your precious time and money! Best of all, it is free!
It’s “no”.
What do you ask? We’ll say it again: “No”.
Sweet and simple “no”.
Say “no” at your office and see how quickly that pile of work on your desk disappears.
“Saying ‘no’ to others means you are saying ‘yes’ to yourself, ” said Leslie Charles, a professional speaker from East Lansing, Michigan.
“Time is precious. People are spending money buying time. And yet we are willing to give up our time because we can’t say ‘no’.”
Susie Watson, a famous writer, said people who always say “yes” need to say “no” without guilt(內(nèi)疚)or fear of punishment. “I would rather have someone give me a loving ‘no’ than an obligated(強制的) ‘yes’, ” she said.
Susie Watson says she feels “no” obligation to give an explanation when she says “no” either socially or professionally. Does she feel guilty about it? “Not at all, ” said Watson, who is director of advertising and public relations at Timex Corp in Middlebury, Conneticut. “Most people are afraid of saying ‘no’… My advice is to say ‘yes’ only if you don’t mean ‘no’.”
Watson said “no” is the most effective weapon against wasting time. “Every year there are more demands on your time… Other people are happy to use up your time, ” Watson said. Time saving appears to be “no’s” greatest friend.
“No” can be your new friend, a powerful tool to take back your life. “No” may even take you further in the business world than “yes”.
“No” is power and strength. “No” now seems completely correct. “Saying ‘no’ isn’t easy. But finally it’s greatly liberating,” Charles said. But, he added, a “no” project needs to be worked on every day because it is hard to change long-term habit.
But, he also warns: “Don’t go to extremes. Don’t find yourself saying ‘no’ to everything. In return you should learn to hear ‘no’.”
5. The sentence “Saying ‘yes’ to yourself” means _______.
A. you can have more time to play with others
B. you needn’t care about other’s feeling if you are happy
C. you are selfish and treat others rudely
D. you can deal with your business as you have planned
6. When you say “no” to others you should say it in a _______.
A. secret way B. polite way
C. proud way D. guilty way
7. In Watson’s opinion, people can save much time on condition that _______.
A. they say “no” at a suitable time
B. they say “no” as much as possible
C. they are afraid of saying “no”
D. they make others angry at them
8. If a person says “no” to everything, the result he or she receive may be that he or she _______.
A. enjoys a wonderful life B. makes a lot of money
C. faces difficulty in life D. forgets to say “yes” in the end
(C)
A characteristic of American culture that has become almost a tradition is to respect the self-made man — the man who has risen to the top through his own efforts, usually beginning by working with his hands. While the leader in business or industry or the college professor occupies a higher social position and commands greater respect in the community than the common laborer or even the skilled factory worker, he may take pains to point out that his father started life in America as a farmer or laborer of some sort.
This attitude toward manual(體力的) labor is now still seen in many aspects of American life. One is invited to dinner at a home that is not only comfortably but even luxuriously (豪華地) furnished and in which there is every evidence of the fact that the family has been able to afford foreign travel, expensive hobbies, and college education for the children; yet the hostess probably will cook the dinner herself, will serve it herself and will wash dishes afterward, furthermore the dinner will not consist merely of something quickly and easily assembled from contents of various cans and a cake or a pie bought at the nearby bakery. On the contrary, the hostess usually takes pride in careful preparation of special dishes. A professional man may talk about washing the car, digging in his flowerbeds, painting the house. His wife may even help with these things, just as he often helps her with the dishwashing. The son who is away at college may wait on table and wash dishes for his living, or during the summer he may work with a construction gang on a highway in order to pay for his education.
9. From paragraph 1, we can know that in America _________.
A. people tend to have a high opinion of the self-made man
B. people can always rise to the top through their won efforts
C. college professors win great respect from common workers
D. people feel painful to mention their fathers as labors.
10. According to the passage, the hostess cooks dinner herself mainly because _________.
A. servants in American are hard to get
B. she takes pride in what she can do herself
C. she can hardly afford servants
D. It is easy to prepare a meal with canned food
11. The expression “ wait on table” in the second paragraph means “_________”.
A. work in a furniture shop B. keep accounts for a bar
C. wait to lay the table D. serve customers in a restaurant
12. Which of the following may serve as the best title of the passage?
A. A Respectable Self-made Family B. American Attitude toward Manual Labor
C. Characteristics of American Culture D. The Development of Manual Labor
(D)
TODAY, Friday, November 12
JAZZ with the Mike Thomas Jazz Band at The Derby Arms. Upper Richmond Road West, Sheen.
DISCO Satin Sounds Disco. Free at The Lord Napier, Mort lake High St., from 8a. m. to 8p. m. Tel: 682—1158.
SATURDAY, November 13
JAZZ Lysis at The Bull’s Head, Barnes. Admission 60p.
MUSICAL HALL at The Star and Garter, Lower Richmond Road, Putney, provided by the Aba Daba Music Hall company. Good food and entertainment fair price. Tel: 789—6749.
FAMILY night out? Join the sing-along at The Black Horse. Sheen Road, Richmond.
JAZZ The John Bennett Big Band at The Bull’s Head, Barnes. Admission 80p.
THE DERBY ARMS, Upper Richmond Road West, give you Joe on the electric accordion(手風(fēng)琴). Tel: 789—4536
SUNDAY, November 14
DISCO Satin Sounds Disco, free at The Lord Napier, Mort Lake High Street, from 8 a. m. to 8 p. m.
FOLK MUSIC at The Derby Arms. The Short Stuff and residents the Norman Chop Trio. Non-remembers 70p. Tel: 688—4626.
HEAVY MUSIC with Tony Simon at The Bull, Upper Richmond Road West, East Sheen.
THE DERBY ARMS, Upper Richmond Road West, give you Joe on the electric accordion.
13. Where and when can you hear the Mike Thomas Jazz Band?
A. At the Derby Arms on Friday.
B. At the Black Horse on Friday.
C. At the Star and Garter on Saturday.
D. At the Derby Arms on Sunday.
14. You want to enjoy the electric accordion on Saturday. Which telephone number do you have to ring to find out what time it starts?
A. 789—6749. B. 789—4536. C. 682—1158. D. 688—4626.
15. You want to spend the Saturday by joining the entertainment with your family. Where should you go?
A. Disco at The Lord Napier.
B. The sing-along at The Black Horse.
C. The electric accordion at The Derby Arms.
D. Jazz at The Bull’s Head.
16. You want to spend the same day at two different places and don’t want to cross any street. Which of the following is your best choice?
A. The sing-along at the Black Horse and Jazz at The Bull’s Head.
B. The sing-along at The Black Horse and Folk Music at The Derby Arms.
C. Folk Music at The Derby Arms and Heavy Music with Tony Simon at The Bull.
D. Musical Hal lat The Star ＆Garter and Disco at The Lord Napier.
(E)
With only about 1, 000 pandas left in the world, China is desperately trying to clone(克隆) the animal and save the endangered species(物種). That’s a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called “Noah’s Ark”.
Noah’s Ark is aimed at collecting eggs, embryos(胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M’s College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2, 000 species of mammals, birds reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.
This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
“The nuclear transfer(核子移植) of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem,” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort,” adds Kraemer, who is one of the leaders of the Project at Texas A& M, the first-ever attempt at cloning a dog.
“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”
17. The aim of “Noah’s Ark” project is to _______.
A. make efforts to clone the endangered pandas
B. save endangered animals from dying out
C. collect DNA of endangered animals to study
D. transfer the nuclear of one animal to another
18. According to Professor Kraemer, the major problem in cloning pandas would be the lack of _______.
A. available panda eggs B. host animals
C. qualified researchers D. enough money
19. The best title for the passage may be _______.
A. China’s Success in Pandas Cloning
B. The First Cloned Panda in the World
C. Exploring the Possibility to Clone Pandas
D. China —the Native Place of Pandas Forever
20. From the passage we know that _______.
A. Kraemer and his team have succeeded in cloning a dog
B. scientists try to implant a panda’s egg into a rabbit
C. Kraemer will work with Chinese scientists in clone researches
D. about two thousand of species will probably die out in a century
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科目：高中英語 來源：湖北省襄樊四中2011屆高三上學(xué)期9月月考試題（英語） 題型：閱讀理解
With only about 1,000 pandas left in the world, China is desperately trying to clone the animal and save these in a dangerous situation. That's a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called "Noah's Ark".
Noah's Ark is aimed at collecting eggs, embryos(胚胎), semen and DNA of these animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M's College of Veterinary, Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2, 000 species of mammals, birds and reptiles will probably become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.
This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
"The nuclear transfer of one species to another is not easy, but the lack of available panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it's difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort," adds Kraemer, who is one of the leaders of the Project at Texas A&M, the first-ever attempt at cloning a dog.
"They are trying to do something that's never been done, and this is very similar to our work in Noah's Ark. We're both trying to save animals that face extinction. I certainly appreciate their effort and there's a lot we can learn from what they are attempting to do. The cooperation between us is very much needed."
67. The final aim of "Noah's Ark" project is to___________. .
A. make efforts to clone the endangered pandas
B. save endangered animals from dying out
C. collect DNA of endangered animals to study
D. transfer the nuclear of one animal to another
68. According to Professor Kraemer, ___________.
A. the long time lasting cloning research could be successful.
B. the eggs transfers immediately result in having a baby.
C. the lack of nuclear transfer could be a major problem to have new pandas.
D. if species should die out, basic building blocks would heal them.
69. The best title for the passage may be______________.
A. China's Success in Pandas Cloning
B. Helping Ways to Avoid Extinction
C. Exploring the Possibility to Clone Pandas
D. The Practice in Noah's Ark
70. From the passage we know that______________.
A. Kraemer and his team have succeeded in cloning a panda
B. scientists try to implant a panda's egg into a rabbit
C. Kraemer will work with Chinese scientists in clone researches
D. about two thousand species are to die out in a century
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科目：高中英語 來源：2011-2012學(xué)年廣西桂林中學(xué)高一下學(xué)期期中考試英語試卷（帶解析） 題型：閱讀理解
Many people consider their pets members of the family and are very sad when they die, but what if you could clone your dog, cat or bird?
A scientist in New Orleans, who has proved his ability to clone other animals, is now offering the possibility to pet owners here in Wisconsin．
Scientists have not been able to clone dogs, cats or other pets, but if and when the time comes, several companies will be ready and able to do the job．
The question is: Are you ready to clone your pet? Brett Reggio is betting on it．He is working on his Ph. D at Louisian State University. He's successfully cloned a goat five times and wants to try the process on family pets． So he started a business called Lazaron． “What Lazaron provides is the first step in the cloning process． ”He said．“It’s for curing and storing the fiberglass cells that will be used for cloning．”
“Your first reaction is yeah! I think I’d like that．” said Donna Schacht, a pet owner．
“I don’t believe you can ever replace a special love,” pet owner Paulette Callattion said．
Most pet owners will tell you freezing your pet’s DNA in hopes of one day cloning it is a personal decision．
Scientists say that cloning your own pet doesn’t mean that the offspring（后代） will have the same intelligence, temperament（性情） or other qualities that your pet has．
【小題1】From the passage we know that scientists have ______．
| A．tried to clone animals |
| B．cloned many kinds of animals |
| C．been able to clone pets for people |
| D．once cloned goats successfully |
| A．clone pets for people |
| B．store the DAN of people’s pets for cloning one day |
| C．make pets members of a family |
| D．collect different ideas on cloning from people |
| A．they think it would be too expensive |
| B．they don’t think scientists will one day be able to clone their pets |
| C．they think the cloned pet would not be the one they once had |
| D．they don’t want to give any love to the cloned pet |
| A．looked different from the pet you once had |
| B．turned out to be another kind of animal |
| C．had a different character |
| D．were just the same pet your once had |
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科目：高中英語 來源：2011-2012學(xué)年福建省四地六校高二下學(xué)期第三次月考英語試卷（帶解析） 題型：閱讀理解
Scientist Says ‘No’ to Human Cloning
“I’ve never met a human worth cloning,” says cloning expert Mark Westhusin from his lab at Texas A&M University. “It’s a stupid endeavor.”
That’s an interesting choice of adjective, coming from a man who has spent millions of dollars trying to clone a 13-year-old dog named Missy. So far, he and his team have not succeeded, though they have cloned two cows and a cat.
They just might succeed in cloning Missy soon — or perhaps not for another five years.
Westhusin's experience with cloning animals leaves him upset by all this talk of human cloning. In three years of work on the Missy project, using hundreds upon hundreds of dog's eggs, the A&M team has produced only a dozen or so embryos carrying Missy's DNA. None have survived the transfer to a surrogate（代孕的）mother. The wastage of eggs and the many spontaneously aborted(流產(chǎn)，發(fā)育不全) fetuses（胎）may be acceptable when you're dealing with cats or bulls, he argues, but not with humans. “Cloning is incredibly inefficient, and also dangerous,” he says.
Even so, dog cloning is a commercial opportunity, with a nice research payoff. Ever since Dolly the sheep was cloned in 1997, Westhusin's phone has been ringing with people calling in hopes of duplicating their cats and dogs, cattle and horses. “A lot of people want to clone pets, especially if the price is right,” says Westhusin. Cost is no obstacle for Missy's mysterious billionaire owner; he's put up $3.7 million so far to fund A&M's research.
Contrary to some media reports, Missy is not dead. The owner wants a twin to carry on Missy's fine qualities after she does die. The prototype（原型；雛形）is, by all accounts, athletic, good-natured and supersmart. Missy's master does not expect an exact copy of her. He knows her clone may not have her temperament（氣質(zhì)、性情）. In a statement of purpose, Missy's owner and the A&M team say they are “both looking forward to studying the ways that her clones differ from Missy.”
Besides cloning a great dog, the project may contribute insight into the old question of nature vs. nurture. It could also lead to the cloning of special rescue dogs and many endangered animals.
However, Westhusin is cautious about his work. He knows that even if he gets a dog pregnant, the offspring, should they survive, will face the problems shown at birth by other cloned animals: abnormalities like immature lungs and heart and weight problems~ “Why would you ever want to clone humans,” Westhusin asks, “when we're not even close to getting it worked out in animals yet?”
【小題1】By “stupid endeavor”, Westhusin means to say that ________.
| A．human cloning is a foolish undertaking |
| B．a(chǎn)nimal cloning is absolutely impractical |
| C．human cloning should be done selectively |
| D．a(chǎn)nimal cloning is not worth the effort at all |
| A．Its success is already in sight. |
| B．It is progressing smoothly. |
| C．It is doomed to utter failure. |
| D．Its outcome remains uncertain. |
| A．study the possibility of cloning humans |
| B．search for ways to modify its temperament |
| C．find out the differences between Missy and its clones |
| D．examine the reproductive system of the dog species |
| A．a(chǎn) bad temper |
| B．defective（有缺陷的、有毛病的）organs |
| C．immune deficiency |
| D．a(chǎn)n abnormal shape |
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