题目内容
Most people would agree that it would be wonderful if humans could regenerate (再生) limbs. Those who have lost their arms or legs would be complete again. The day is still far off when this might happen. But in the last 10 years, doctors have reported regeneration in smaller parts of the body, most often fingers.
Regeneration is not a newly-discovered process. For centuries, scientists have seen it work in some kinds of animals. Scientists now are looking for a way to turn on this exciting ability in more highly-developed animals, including humans. Their experiments show that nerves (神经), cell chemistry and the natural electric currents in the body all seem to have a part in this process.
The body of every animal contains general purpose cells that change into whatever kind of cells the body needs. These cells collect around the wound. They form a mass called a blastema (芽基). The cells of the blastema begin to change. Some became bone cells, some muscle cells, some skin cells. Slowly, a new part re-grows from the body outward. When completed, the new part is just like the old one.
More than 200 years ago, Italian scientist Luigi Spallanzani showed that younger animals have a greater ability to regenerate lost parts than older animals. So do animals lower on the ladder of evolutionary (进化的) development. The major differences seem to be that less-developed animals have more nerves in their tails and legs than humans do in their arms and legs.
Another helpful piece of information was discovered in the late 1800s. Scientists found that when a creature is injured, an electrical current flows around the wound. The strength of the current depends on how severe the wound is and on how much nerve tissue (组织) is present.
59.According to the passage, limb regeneration ________.
A. will become a reality in the near future
B. has been reported successful in some patients
C. has a long way to go before it works in humans
D. is a branch of study set up by a group of modern doctors
60.What animals are lower on the ladder of evolutionary development ?
A. More-developed animals. B. Less-developed animals.
C. Highly developed animals. D. Fully-developed animals.
61.According to Luigi Spallanzani’s discovery, ________.
A. humans have less nerves in the limbs than animals
B. some animals may not have so much nerve tissue as others
C. an injured animal regenerates masses of cells round the wound
D. electrical current can be found around the would in younger animals
62.The passage is mainly about ________.
A. a newly-discovered process B. research on animal evolution
C. a new medical discovery D. research on regeneration
59.C [分析]第一段中The day is far off when….
60.B [分析]字面理解题。
61.A [分析]第四段最后一句。
62.D
解析
Taiwan will finalize a plan by the end of June to open up the island to tourists from mainland China, though no date has been fixed for formal implementation(执行), an official at the Mainland Affairs Council(MAC)said on Monday.
The official said the reports in the local press on Monday that the MAC has decided to postpone its plan to announce the implementation of the new plan on July 1 were inaccurate.
The official said cooperation between different organizations was still underway.The United Daily news quoted the director of the MAC’s legal affairs department, Liu Thehsun, as saying the plan to open up to mainland tourists would not be implemented as scheduled due to a lack of cross-strait communication.
Although relevant authorities, including the Bureau of Immigration and the Tourism Bureau, have complete reports on how to deal with visitors from mainland China, the decision has been taken not to press, ahead with announcement of the plan’s implementation on the first of July, Liu was quoted as saying.
The report also said that while no restrictions would be imposed on the mainland visitors in terms of age or residence in China, the visitors would need to hold a steady job or have more than 50,000RMB(about 6,000, U.S.dollars)in bank savings before they would be eligible(有资格的)to visit Taiwan.
In addition, Taiwan bound mainland tourists would have to come as part of a tour group and would be allowed to stay a maximum of 10 days each time.
The number of mainland tourists allowed to enter the island would also initially be limited to 1,000 people a day.
Although most people from Taiwan are free to travel to China, only a small number of mainland Chinese have been able to visit the island due to restrictions imposed by both sides of the Taiwan Strait after the end of a civil war in 1949.
【小题1】At the moment, according to the passage, ___________.
A.no mainland Chinese can visit Taiwan now |
B.any mainland Chinese can visit Taiwan now |
C.many mainland Chinese have ever visited Taiwan since 1949 |
D.a few mainland Chinese have ever visited Taiwan since 1949 |
A.there will be no restrictions to mainland visitors |
B.mainland visitors who want to travel in Taiwan must have at least ¥50,000 in the bank savings account |
C.there will be no age restrictions to the mainland visitors |
D.mainland visitors will be free to travel to Taiwan |
A.MAC | B.United Daily |
C.several organizations | D.Bureau of Immigration |
A.The implementation of the plan has not been fixed. |
B.It was originally fixed on July 1 to announce the plan’s implementation. |
C.For lack of cross-strait communication, the plan will not be officially completed until July. |
D.When the plan is finalized, it will be announced immediately. |