Question

阅读理解

阅读下列四篇短文，从每小题后所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该选项涂黑。

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（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 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.

Answer

1.B

2.A

3.C

4.D

【解析】

1. 推理题。根据文章第一段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”.中国科学家作者努力克隆大熊猫，以挽救这种濒危的动物。美国的Texas A & M University研究人员也在做同样的事情，也就说他们也在努力挽救那些濒危动物。故B正确。

2. 细节题。根据第六段第一句“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.可知这个项目最大的问题是缺少大熊猫的卵子。所以进行大熊猫的核子移植就非常困难。故A正确。

3. 主旨大意题。本文主要叙述的是中国和美国的科学家都在努力进行大熊猫克隆，并告诉我们这个项目遇见的最大困难是缺少大熊猫的卵子。故C正确。

4. 细节题。根据第三段第一句It is estimated that as many as 2, 000 species of mammals, birds reptiles will become extinct in over 100 years.可知在未来的100年里，大约有2000多兆生物困难会灭绝。故D正确。