Scientists interest in three-parent children conies from the desire of eliminating______.
A．a rare and life-threatening inherited disease
B．a huge number of rarely-occurring inherited diseases
C．the genetic influence from unhealthy parents
D．mutations in the nuclear DNA

未分类题Which of the following statements about mitochondrial transplantation is true?A．It has been adopted as a medical procedure.B．It has been proved scientifically feasible.C．It is currently regarded as an illegal act.D．It involves artificial DNA modification.

未分类题What is the authors attitude towards the public 'uggh!' factor?

未分类题Why does the writer say 'You might be forgiven for thinking that...'?A．Solving the mystery of sleeping and waking requires new insights.B．Most of the other things people do regularly are biologically straightforward.C．The problem sounds rather grand.D．We still lack for progress though we've spent much more time studying it.

未分类题______, if he doesnt learn he knows nothing.A．A man is ever so cleverB．Be a man ever so cleverC．So clever as a man ever isD．No matter how a man is clever

未分类题If one travels on the Mediterranean cruise in the future,A．he she will become a cheapskate.B．it will cost him her more money.C．it will become more economical.D．there will be no free services.

未分类题You will see to______the engine does not get out of order.A．thatB．howeverC．it thatD．which

未分类题The authors biggest worry about using nuclear energy is that_____.A．it will do great harm to the inadequate reserves of coalB．it is deadly if terrorists attack a nuclear plantC．it will limit the development of many other alternativesD．there will be a wider gap between developed and developing countries

未分类题______ when Shanghai was the paradise for imperialist adventurers.A．Gone are the daysB．Are the days goneC．Gone the days areD．Are gone the days

未分类题She______not have seen you yesterday, for she was not there.A．mightB．couldC．shouldD．must

未分类题What does euthanasia mean?A．A way of killing oneselfB．A way of ending a patient's life naturallyC．The painless killing of people who are incurably ill or very oldD．A murder by the doctor

未分类题While much of the attention on fighting AIDS and other diseases in poor countries has focused on access to affordable drugs, concern is now shifting to the question of who exactly, will deliver them. Unfortunately, there is a severe shortage of doctors, nurses and other health-care workers in these countries. According to a report published in this weeks Lancet by the Joint Learning Initiative (JLI), an international consortium of academic centres and development agencies, sub-Saharan Africa has only one-tenth the number of nurses and doctors per head of population that Europe does, though its health-care problems are far mom pressing. (47)The reasons for this are twofold, and well known—not enough health-care workers are trained in the fast place, and too many of those who are trained then leave for better-paid jobs in the rich world. What the report does is to put some numbers on these problems. A mere 5,000 doctors, it finds, graduate in Africa each year (a third of the number that graduate in America). Only 50 of 600 doctors mined in Zambia in recent years are still in the country. There are more Malawian doctors in Manchester than Malawi. (48)And many rich countries exacerbate the problem by recruiting from poor ones to help deal with their own shortages. To overcome all this, the JLI reckons that the world needs 4m more health-care workers, of whom lm are required in sub-Saharan Africa alone. The question is who will pay for them? The report floats some ideas. (49)It recommends that roughly $400m, or 4% of the overseas aid currently spent on health, -be earmarked to help build up the health-care workforce in poor countries. (50)But it also suggests that better use be made of existing resources, for example by employing local volunteers rather than highly trained doctors for many routine matters. As Lincoln Chen of Harvard University, one of the reports authors, points out, a few countries, such as Brazil, Thailand and Iran, have taken steps in the right direction. Others need to follow their lead.

未分类题______the dog was the first animal to be domesticated is generally agreed upon by authorities in the field.A．UntilB．It wasC．WhatD．That

未分类题What was troubling New York in late 1960s and early 1970s according to the passage?A．There 559,000 in the drug users in the state.B．There was a 31 % increase in drug use by 1972.C．It was short of money solving drug problem.D．The drug problem seemed going out of control.

未分类题It can be inferred from the first paragraph that______.A．the essential qualities of a true Pan-Americanism were defined by Franklin RooseveltB．mutual understanding is one of the most far-reaching elements in North AmericaC．few Americans may be aware of others'point of viewD．America's friendship with Canada and Mexico risks going sour

未分类题He couldnt say what it was______bothered him.A．itB．whichC．thatD．as