Question

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 similar to what Texas A＆M University researchers have been undertaking(負(fù)責(zé)) 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 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.

Chinese scientists said they grew an embryo 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(過(guò)程) 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 effort 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 cat

B. scientists try to implant a panda’s egg into a tiger

C. Kraemer will work with Chinese scientists in clone researches

D. about two thousand of species will probably die out in about a century

Answer 1

1--4      BACD  

解析:

本文介紹了科學(xué)家們正在運(yùn)用克隆技術(shù)拯救如中國(guó)的大熊貓這種即將絕種的動(dòng)物。

1.B。推斷題。根據(jù)文章第1段中所說(shuō)save the endangered species及第2句的That’s similar to what Texas A ＆ M University可推知此題答案為B。

2.A。細(xì)節(jié)題。根據(jù)文章第4段中Kraemer所說(shuō)的話可推知此題答案為A。

3.C。主旨題。根據(jù)文章第1段及全文內(nèi)容可歸納出此題答案為C。

4.D。細(xì)節(jié)題。根據(jù)文章第3段第1句可推知此題答案為D。