更多"DNA克隆(DNA cloning)"的相关试题:
[简答题] Human cloning (克隆) technology could be used to reverse heart attacks. Scientists believe that they may be able to treat heart attack victims by cloning their healthy heart cells and injecting them into the areas of the heart that have been damaged, and other problems may be solved if human cloning and its technology are not forbidden.
With cloning, infertile couples could have children. Current treatments for infertility, in terms of percentages (百分比 ) , are not very successful. Couples go through physically and emotionally painful procedures for a small chance of having children. Many couples run out of time and money without successfully having children. Human cloning could make it possible for many more infertile couples to have children than ever before.
We should be able to clone the bone marrow (骨髓) for children and adults suffering from leukemia (白血病). This is expected to be one of the first benefits to come from cloning technology.
We may learn how to s
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Cloning(克隆): Future Perfect
1. A clone is all exact copy of a plant or animal produced from any one
cell. Since Scottish scientists reported that they had managed to clone a sheep
named Dolly in 1997, research into cloning has grown rapidly. In May 1998,
scientists in Massachusetts managed to create two identical calves (牛犊) using
cloning technology. A mouse has also been cloned successfully. But the debate
over cloning humans really started when Chicago physicist Richard Seed made a
surprising announcement: "We will have managed to clone a human being within the
next two years," he told the world.
2. Seed’s announcement
provoked a lot of media attention, most of it negative. In Europe, nineteen
nations have already signed an agreement banning human cloning and in the US the
President announced, "We will be introducing a law to ban all human cloning and
many states in the US will have passed anti-cloning laws by the end of the
year."
3. Many researchers are not so negative about cloning,
they are worried that laws banning human cloning will threaten important
research. In March, The New England Journal of Medicine called any plan to ban
research on cloning humans seriously mistaken. Many researchers also believe
that in spite of attempts to ban it, human cloning will have become routine by
2010 because it is impossible to stop the progress of science.
4. Is there reason to fear that cloning will lead to a nightmare world The
public has been bombarded (轰炸) with newspaper articles, television shows and
films, as well as cartoons. Such information is often misleading, and makes
people wonder what on earth the scientists will be doing next.
Within the next five to ten years scientists will probably have found a way of
cloning humans. It could be that pretty soon we will be able to choose the
person that we want our child to look like. But how would it feel to be a clone
among hundreds, the anti-cloners ask. Pretty cool, answer the pro-cloners
(赞成克隆的人).A. Where you stand while waiting to cross
B. Where you walk
C. Where you sit on a bus
D. When you go to bed
E. When pollution levels rise
F. When you get up
Paragraph 1 ______
[填空题]
Cloning (克隆): Future Perfect
1.A clone is an exact copy of a plant or animal produced from any one cell. Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997, research into cloning has grown rapidly. In May 1998, scientists in Massachusetts managed to create two identical calves (牛犊) using cloning technology. A mouse has also been cloned successfully. But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement: "We will have managed to clone a human being within the next two years. " he told the world.
2.Seed’s announcement provoked a lot of media attention, most of it negative. In Europe, nineteen nations have already signed an agreement banning human cloning and in the U.S. the President announced: "We will be introducing a law to ban all human cloning and many states in the U.S. will have passed anti-cloning laws by the end of th