2. 外语
  3. With only about 1,000 pandas left in the world, China is desperately trying to clone (克隆) the animal and save the endangered spe

With only about 1,000 pandas left in the world, China is desperately trying to clone (克隆) the animal and save the endangered spe

admin2011-02-28  14
问题     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. Dr. Duane Kraemer, a professor in Texas A & M’s College of Veterinary Medicine and a pioneer in embryo(胚胎) transfer work and related procedures, said he salutes the Chinese effort and "I wish them all the best success possible. It’s a worthwhile project, certainly not an easy one."
    Noah’s Ark is aimed at collecting eggs, embryos, semens (精子) and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Kraemer says there would be enough of the basie 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 over the next 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, 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. 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 Missyplicity 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 applaud 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 word "groundbreaking" ( paragraph 7 ) can be interpreted as ______.
选项 A、pioneering
B、essentially new
C、epoch - making
D、evolutionary
答案A
解析 在做词汇意义推断题时，一个很重要的方法就是将可能存在的几个意义置于文中，从上下文的角度来进行逻辑与意义的判断取舍。从本题看，最有可能的是AC项，它们的意义分别是“开拓性的”和“划时代的。而从全文来分析，前一个意义更吻合主题。
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