题目列表(包括答案和解析)
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(物种). 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 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.”
1．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
2．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
3．Which of the following should be the best title for the passage?
A．China’s Success in Pandas Cloning
B．First Cloned Panda in the World
C．Exploring the Possibility to Clone Pandas
D．China —the Native Place of Pandas Forever
4．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
With only about 1, 000 pandas left in the world, China is desperately trying to clone the animal and save the endangered species．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（灭绝）, 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 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（移植） the embryo into a host animal．
The entire procedure（程序） 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 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.”
1．The aim of “Noah’s Ark” project is to _______.
A．make efforts to clone the endangered pandas
B．collect DNA of endangered animals to study
C．save endangered animals from dying out
D．transfer the nuclear of one animal to another
2．According to Professor Kraemer, the major problem in cloning pandas would be the lack of _______.
A．host animals B．available panda eggs
C．qualified researchers D．enough money
3．From the passage we know that _______.
A．about two thousand of species will probably die out in a century
B．Kraemer and his team have succeeded in cloning a dog
C．scientists try to implant（移植） a panda’s egg into a rabbit
D．Kraemer will work with Chinese scientists in clone researches
4．Which of the following should be the best title for the passage?
A．China’s Success in Pandas Cloning．
B．The First Cloned Panda in the World.
C．China —the Native Place of Pandas Forever．
D．Exploring the Possibility to Clone Pandas.
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。
When I walked into the house after school, the first thing I noticed was a box with items I recognized from my dad's office．When he told me that he was laid off, I thought he was joking．Then I noticed his seriousness and realized he was telling the truth．My father has always been a hard worker．He has prided himself on his career． 1 I guess I had taken his work for granted．
2 For starters, he was home all the time．It meant my bed had to be made, my room cleaned up, and my homework done right after school．I would come home every day to find him at the computer searching for jobs． 3 He seemed down, though he tried to be optimistic．He asked my brother and me to spend less．I gave up my spending money, which wasn't much．I also found a part-time job．
4 He explained that he never wanted to be laid off again, so he was going to start his own business．Day by day, I watched him build it．One evening I asked if he needed help．“Only if it doesn't affect school, ” he said．I showed up at his office the next afternoon, and most afternoons after that for two months．
5 The terrible experience for our family taught me how to deal with difficulties．Now I know that through creative problem-solving, I can always find Plan B．I can ask for help and take risks．What I have learned from my dad's understanding of business and his work ethic(信条)are two of the most important lessons I will ever learn．And they will be my principles for success．
A．Providing for our family has been his joy．
B．I made every effort to solve his problems．
C．I began to notice how losing his job had affected him．
D．My father's unemployment created many changes in our lives．
E．After months of searching, my dad decided to go in a totally different direction．
F．His courage and determination helped him to become successful in his new career．
G．I always knew he was a hard worker, but watching him in action influenced me a lot．
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(物种). 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 and 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.”
1．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
2．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
3．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
4．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
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（物种）. 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 firstever 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.”
(1) 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
(2) According to Professor Kraemer, the major problem in cloning pandas would be the lack of ________.
[ ]
(3) 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
(4) 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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