题目内容
经销单位必须经()批准，才可以设置危险化学品贮存仓库。
查看答案
搜索结果不匹配？点我反馈
更多问题
某投资者于2008年7月1日买人一只股票，价格为每股12元，同年10月1H该股进行分红，每股现金股利0.5元，同年12月31日该投资者将该股票卖出，价格为每股13元，则该项投资的年化收益率应为()。
如果刘先生夫妇采取定期定额投资方式积累退休金，则每月还需要投资()元。
Which type of cable should be used to make a connection between the Fa0/0 port on a router
Part A
Directions: Read the following three texts. Answer the questions on each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET 1.
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 researcher has been undertaking for the past five years in a project called "Noah's Ark."
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, says he salutes the Chinese effort and "I wish them all the best success possible. It's a worthwhile project, certainly not an easy one, and it's very much like what we're attempting here at Texas A&M--to save animals from extinction."
Noah's Ark is aimed at collecting eggs, embryos, semen (精子) and DNA of endangered animals and storing them in liquid nitrogen. If certain species should be come extinct, Kraemer 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 w ill 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 Missy plicity Project at Texas A&M, the first ever attempt at cloning a dog.
The aim of "Noah's Ark" project is to ______.
微信支付 
支付宝支付