单选题He has trouble understanding that other people judge him by his social skills and conduct.

单选题{{B}}第三篇{{/B}} {{B}}Exercise Lowers Employers' Health Costs{{/B}} Companies can save millions in health-care costs simply by encouraging their employees to exercise a little bit, researchers reported on Friday. They said obese (肥胖的) employees had higher health-care costs, but lowered those expenses by exercising just a couple of times a week -- without even losing any weight. Feifei Wang and colleagues at the University of Michigan studied 23,500 workers at General Motors. They estimated that getting the most sedentary (惯于久坐的) obese workers to exercise would have saved about $790,000 a year, or about 1.5 percent of health-care costs for the whole group. Company-wide, the potential savings could reach $7.1 million per year, they reported in the Journal of Occupational and Environmental Medicine. Of the whole group of workers, about 30 percent were of normal weight, 45 percent were overweight (超重的), and 25 percent were obese. Annual health-care costs averaged $2,200 for normal weight, $2,400 for the overweight, and $2,700 for obese employees. But among workers who did no exercise, health-care costs went up by at least $100 a year, and were $3,000 a year for obese employees who were sedentary. But adding two or more days of light exercise -- at least 20 minutes of exercise or work hard enough to increase heart rate and breathing --lowered costs by on average $500 per employee a year, the researchers found.

单选题The nursing vocation, as we know it today, came into being at the beginning of this century.A. professionB. societyC. philosophyD. uniform

单选题Some students lose marks in their examinations simply because they don't read questions carefully.A. easilyB. quicklyC. justD. frequently

单选题From my standpoint, this thing is just ridiculous. A. field 　C. knowledge B. point of view　D. information

单选题We cannot permit such conduct .

单选题When does the next train depart ?

单选题The second injection should only have been given once the first drug had Utaken effect/U.

单选题Cancer is more treatable if it is detected

单选题Exposure to the sun can accelerate the ageing process.

单选题Color changes in chameleons seem to be caused by environmental temperature as well as by other external stimuli.

单选题Moods, say the experts, are emotions that tend to become fixed, influencing one's outlook for hours, days or even weeks. That's great if your mood is a pleasant one, but a problem if you are sad, anxious, angry or simply lonely. Perhaps the best way to deal with such moods is to talk them out; sometimes, though, there is no one to listen. Modern pharmacology(药理学)offers an abundance of tranquilizers(安眠药), anti-depressants and anti-anxiety drugs. What many people don't realize, however, is that scientists have discovered the effectiveness of several non-drug approaches to make you loose from an unwanted mood. These can be just as useful as drugs, and have the added benefit of being non-poisonous. So next time you feel out of sorts, don't head for the drug-store, try the following approach. Of all the mood-altering self-help techniques, aerobic(增氧健身的)exercise seems to be the most efficient cure for a had mood. "If you could keep the exercise, you'd be in high spirits," says Kathryn Lance, author of Running for Health and Beauty. Researchers have explained biochemical and various other changes that make exercise compare favorably to drugs as a mood-raiser. Physical exertion such as housework, however, does little. The key is aerobic exercise--running, cycling, walking, swimming or other repetitive and sustained activities that boost the heart rate, increase circulation and improve the body's utilization of oxygen. Do them for at least 20 minutes a session, three to five times a week.

单选题 下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案。{{B}}第一篇{{/B}} It has been argued that an infant under three who is cared for outside the home may suffer because of the separation from his parents. The British psychoanalyst John Bowlby maintains that separation from the parents during the sensitive "attachment" period from birth to three may scar a child's personality and predispose to emotional problems in later life. Some people have drawn the conclusion from Bowlby's work that children should not be subjected to day care before the age of three because of the parental separation it entails, and many people do believe this. But there are also arguments against such a strong conclusion. Firstly anthropologists point out that the secluded love affair between children and parents found in modern societies does not usually exist in traditional societies. For example, we saw earlier that among the Ngoni the father and mother of a child did not rear their infant alone--far from it. But traditional societies are so different from modern societies that comparisons based on just one factor are hard to interpret. Secondly, common sense tells us that day care would not be so widespread today if parents, caretakers or pediatricians found that children had problems with it. But Bowlby's analysis raises the possibility that early day care has delayed effects. The possibility that such care might lead to, say, more mental illness or crime 15 or 20 years later can only be explored by the use of statistics. Statistical studies of this kind have not yet been carried out, and even if they were, the results would be certain to be complicated and controversial. Thirdly, in the last decade, there have been a number of careful American studies of children in day care, and they have uniformly reported that day care had a neutral of slightly positive effect on children's development. But tests that have had to be used to measure this development are not widely enough accepted to settle the issue.

单选题Illinois has produced writers such as Car1 Sandburg, gangsters such as A1 Capone, and architects such as Louis Sullivan. A. violent criminals B. politicians C. musicians D. industrialists

单选题 Explorer of the Extreme Deep Oceans cover more than two-thirds of our planet. Yet, just a small fraction of the underwater world has been explored. Now, scientists at the Woods Hole Oceanographic Institution (WHOI) in Massachusetts are building an underwater vehicle that will carry explorers as deep as 6,500 meters (21,320 feet). The new machine, known as a manned submersible or human-operated vehicle (HOV), will replace another one named Alvin which has an amazing record of discovery, playing a key role in various important and famous undersea expeditions. Alvin has been operating for 40 years but can go down only 4,500 meters (14,784 feet). It's about time for an upgrade, WHOI researchers say. Alvin was launched in 1964. Since then, Alvin has worked between 200 and 250 days a year, says Daniel Fornari, a marine geologist and director of the Deep Ocean Exploration Institute at WHOI. During its lifetime, Alvin has carried some 12,000 people on a total of more than 3,000 dives. A newer, better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries, Fornari says. It might also make the job of exploration a little easier. "We take so much for granted on land," Fornari says. "We can walk around and see with our eyes how big things are. We can see colors, special arrangements." Size-wise, the new HOV will be similar to Alvin. It'll be about 37 feet long. The setting area inside will be a small sphere, about 8 feet wide, like Alvin, it'll carry a pilot and two passengers. It will be just as maneuverable. In most other ways, it will give passengers more opportunities to enjoy the view, for one thing. Alvin has only three windows, the new vehicle will have five, with more overlap so that the passengers and the pilot can see the same thing. Alvin can go up and down at a rate of 30 meters every second, and its maximum speed is 2 knots (about 2.3 miles per hour), while the new vehicle will be able to ascend and descend at 44 meters per second. It'll reach speeds of 3 knots, or 3.5 miles per hour.

单选题His idea to solve the problem is really {{U}}original{{/U}}. A. creative B. great C. practical D. perfect

单选题The food is {{U}}insufficient{{/U}} for three people. A. instant B. infinite C. inexpensive D. inadequate

单选题The minister {{U}}approved{{/U}} the building plans after he discussed with other ministers.

单选题America's emphasis on the importance of education for everyone has {{U}}spurred{{/U}} scientific research. A. encouraged B. endangered C. endorsed D. enlarged

单选题 Once Daily Pill Could Simplify HIV Treatment Bristol-Myers Squibb and Gilead Sciences have combined many HIV drugs into a single pill. Sometimes the best medicine is more than one kind of medicine. Malaria, tuberculosis and HIV/AIDS, {{U}} {{U}} 1 {{/U}} {{/U}}, are all treated with combinations of drugs. But that can mean a lot of pill to take. It would be {{U}} {{U}} 2 {{/U}} {{/U}}drug companies combined all the medicines into a single pill, taken just once a day. Now, two companies say they have done that for people just {{U}} {{U}} 3 {{/U}} {{/U}}treatment for HIV, the virus that causes AIDS. The companies are Bristol-Myers Squibb and Gilead Science. They have {{U}} {{U}} 4 {{/U}} {{/U}}a single pill that combines three drugs currently on the market. Bristol-Myers Squibb sells one of them {{U}} {{U}} 5 {{/U}} {{/U}}the name of Sustiva. Gilead combined the {{U}} {{U}} 6 {{/U}} {{/U}}, Emtriva and Viread, into a single pill in two thousand four. Combining drugs involves more than {{U}} {{U}} 7 {{/U}} {{/U}}issues. It also involves issues of competition {{U}} {{U}} 8 {{/U}} {{/U}}the drugs are made by different companies. The new once-daily pill is the result of {{U}} {{U}} 9 {{/U}} {{/U}}is described as the first joint venture agreement of its kind in the treatment of HIV. In January the New England Journal of Medicine published a study of the new pill. Researcher compared its {{U}} {{U}} 10 {{/U}} {{/U}}to that of the widely used combination of Sustiva and Combivir. Combivir {{U}} {{U}} 11 {{/U}} {{/U}}two drugs, AZT and 3TC. The researchers say that after one year of treatment, the new pill suppressed HIV levels in more patients and with fewer {{U}} {{U}} 12 {{/U}} {{/U}}effects. Gilead paid for the study. Professor Joel Gallant at the Johns Hopkins School of Medicine in Baltimore, Maryland, led the research. He is a paid adviser to Gilead and Bristol-Meyers Squibb as well as the maker of Combivir, Glaxo Smith Kline. Glaxo Smith Kline reacted {{U}} {{U}} 13 {{/U}} {{/U}}the findings by saying that a single study is of limited value. It says the effectiveness of Combivir has been shown in each of more than fifty studies. The price of the new once-daily pill has not been announced. But Gilead and Bristol-Myers Squibb say they will provide it at reduced cost to developing countries. They plan in the next few months to ask the United States Food and Drug Administration to approve the new pill. There are limits to who could take it {{U}} {{U}} 14 {{/U}} {{/U}}the different drugs it contains. For example, {{U}} {{U}} 15 {{/U}} {{/U}}women are told not to take Sustiva because of the risk of birth disorders. Experts say more than forty million people around the world are living with HIV.