单选题Our aim was to (update) the health service, and we succeeded.

单选题The closer a plant is to its natural state, the less suitable it is to ______ .

单选题Which is NOT true of sparklers?

单选题The doctor's pills worked Umarvels/U for me.

单选题It is virtually impossible to persuade him to apply for the job.

单选题 Medicine Award Kicks off Nobel Prize Announcements Two scientists who have won praise for research into the growth of cancer cells could be candidates for the Nobel Prize in medicine when the 2008 winners are presented on Monday, kicking off six days of Nobel announcements. Australian-born U.S. citizen Elizabeth Blackburn and American Carol Greider have already won a series of medical honors for their enzyme research and experts say they could be among the front-runners for Nobel. Only seven women have won the medicine prize since the first Nobel Prizes were handed out in 1901. The last female winner was U.S. researcher Linda Buck in 2004, who shared the prize with Richard Axel. Among the pair's possible rivals are Frenchman Pierre Chambon and Americans Ronald Evans and Elwood Jensen, who opened up the field of studying proteins called nuclear hormone receptors. As usual, the award committee is giving no hints about who is in the running before presenting its decision in a news conference at Stockholm's Karolinska Institute. Alfred Nobel, the Swede who invented dynamite, established the prizes in his will in the categories of medicine, physics, chemistry, literature and peace. The economics prize is technically not a Nobel but a 1968 creation of Sweden's central bank. Nobel left few instructions on how to select winners, but medicine winners are typically awarded for a specific breakthrough rather than a body of research. Hans Jornvall, secretary of the medicine prize committee, said the 10 million kronor (US $1.3 million) prize encourages groundbreaking research but he did not think winning it was the primary goal for scientists. "Individual researchers probably don't look at themselves as potential Nobel Prize winners when they're at work," Jornvall told The Associated Press. "They get their kicks from their research and their interest in how life functions." In 2006, Blackburn, of the University of California, San Francisco, and Greider, of Johns Hopkins University in Baltimore, shared the Lasker prize for basic medical research with Jack Szostak of Harvard Medical School. Their work set the stage for research suggesting that cancer cells use telomerase to sustain their uncontrolled growth.

单选题The U.S. faces severe economic problems.

单选题She was a puzzle. A. girl 　 B. woman C. problem D. mystery

单选题The boy is{{U}} intelligent. {{/U}}

单选题Since the 1950's, literary critics have attempted to answer the question: When did children's literature first emerge as a distinct literary genre?A. improveB. appearC. conformD. respond

单选题{{B}}第二篇{{/B}} There may be a good reason why some people are not able to stop smoking cigarettes. A new study found that people who suffer from depression were two times as likely to fail when they tried to stop smoking. Alexander Glassman presented the findings recently during the yearly meeting of the American Psychiatric Association. Doctor Glassman is the director of an antismoking center at Columbia University in New York City. His study examined 100 smokers who have a history of depression. People with depression suffer periods of extreme sadness. The researchers studied people who have succeeded and those who have failed in their efforts to stop smoking. The study found that people who did stop smoking were two times as likely to suffer from depression again within six months as those who continued to smoke. Doctor Glassman says smokers who are depressed use tobacco to make themselves feel better. But, he says people with depression seem to have a much harder time stopping than non-depressed smokers. So, drugs to fight depression are now also being used to help people stop smoking. Doctors say the most effective one is called Buproprion. Buproprion mainly affects the brain chemical dopamine(多巴胺). nicotine(尼古丁) is a substance in tobacco that also affects dopamine. Buproprion helps people stop smoking because it eases the body's desire for nicotine. Doctor Glassman says the drug does not make people stop smoking. But it makes it easier for those who want to stop.

单选题There was no alternative but to close the road.

单选题We need toU extract/U the relevant financial data．

单选题A {{U}}reporter{{/U}} from the local paper asked for details of the accident.

单选题The Airclear features a convenient, slide - control of fragrance dispenser; a fan that is powerful yet whispers quiet. Ruggedly constructed, the AirClear is the first and only personal air purifier that's both full featured and value priced. Regularly $ 69.95. Now $ 59.95. That's a $10. 00 savings. Save $ 25.00 when ordering two! The current price of the air purifier isA. $10.00B. $25.00C. $59.95D. $69.95

单选题The agenda will be choosen through an {{U}}ongoing{{/U}} process of consultations with officials of governments and international organizations.

单选题The largest part of our revenue comes from Consumer and Salons activities.A. expenditureB. costC. amountD. income

单选题Lead Poisoning: A Silent Epidemic How much lead is harmful? Until the 1970s, exposure to lead was considered dangerous only at blood levels associated with extreme symptoms of poisoning: convulsions (惊厥), brains swelling, acute kidney disease, stomach pains and hallucinations (幻觉). But low -level lead poisoning can cause symptoms that, while subtle, are no less serious. As a result, the CDC has continually lowered the point at which patients should be treated for lead poisoning. One of the most influential study of lead' s low - level effects was published by Herbert Needleman, professor of psychiatry at the University of Pittsburgh Medical School. Testing first and second grade students in the Boston area, he found the lowest I. Q. , academic achievement, language skills and attention span among children with the highest tooth levels (起损害作用的量) of lead. "None of their lead levels exceed the CDC's 1979 toxicity threshold. "Says Paul Mushak, an expert on toxic substances, "Our children and people in the risk groups shouldn't be held hostage (成为人质) to a preventable disease. " What can be done? In some cases the treatment for low - level lead poisoning can be as simple as removing the source of pollution, for example, to stop drinking tap water in some cases. But no one knows the long - term effects of lead poisoning may be. The small amount of research done so far suggest that intellectual impairment may be irreversible (不可逆的). Nor is it always easy to know what water is safe. Jeanne Briskin, a policy analyst with the EPA, reports that in uncounted schools across the country water in drinking fountains may be lead - contaminated. Even the child whose parents have removed the lead threat at home may still be gulping (吞咽)the metal every school day. The American Academy of Pediatrics recommends that children be screened for lead poisoning at 12 months of age, with their doctor to determine follow - up examinations; men at risk for hypertension (高血压) should also have their blood lead levels tested. Prevention is even more important. Public -health specialists have intensified efforts to control the pollutant. Meanwhile, for the individual, that means testing potential household sources of contamination.

单选题They soon began to investigate the cause of the fire.A. affirmB. inventC. examineD. deny

单选题{{B}}第三篇{{/B}} {{B}}Happy Therapy (诊疗){{/B}} Norman Cousins was a businessman from the United States who often traveled around the world on business. He enjoyed his work and traveling. Then, after returning to the United States from a busy and tiring trip to Russia, Mr. Cousins got sick. Because he had pushed his body to the limit of its strength on the trip, a chemical change began to take place inside him. The material between his bones became weak. In less than one week after his return, he could not stand. Every move that he made was painful. He was not able to sleep at night. The doctors told Mr. Cousins that they did not know how to cure his problems and he might never get over the illness. Mr. Cousins, however, refused to give up hope. Mr. Cousins thought that unhappy thoughts were causing bad chemical changes in his body. He did not want to take medicine to cure himself. Instead, he felt that happy thoughts or laughter might cure his illness. He began to experiment on himself while still in the hospital by watching funny shows on television. Mr. Cousins quickly found that ten minutes of real laughter during the day gave him two hours of pain-free sleep at night. Deciding that the doctors could not help him, Mr. Cousins left the hospital and checked into a hotel room where he could continue his experiments with laughter. For eight days, Mr. Cousins rested in the hotel room watching funny shows on television, reading funny books, and sleeping whenever he felt tired. Within three weeks, he felt well enough to take a vacation to Puerto Rico where he began running on the beach for exercise. After a few months, Mr. Cousins returned to work. He had laughed himself back to health.