单选题 下面有3篇短文，每篇短文后有5道题，每道题后面有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个最佳答案填在题前的括号内。{{B}}第一篇{{/B}} {{B}}A Thirsty World{{/B}} The world is not only hungry; it is also thirsty for water. This seems strange to you, since nearly 75% of the earth's surface is covered with water. But about 97% of this huge amount is from sea-water, or salt water. Man can only drink and use the other 3%—the fresh water that comes from rivers, lakes, underground, and other sources. And we cannot even use all of that, because some of it is in the form of iceberg (冰山) and glaciers (冰川). Even worse, some of it has been polluted. At the moment, this small amount of fresh water is still enough for us. However, our need for water is increasing rapidly. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry. In addition to stopping wasting our precious water, one useful step we should take is to develop ways of reusing it. Experiments have already been done in this field, but only on a small scale. Today, in most large cities tanks, water is used only once and it eventually returns to the sea orruns into underground storage tanks. But it is possible to pipe water that has been used to a purifying (净化) plant. There it can be filtered (过滤) and treated with chemicals so that it can be used again just as it were fresh from a spring. But even if every large city purified and reused its water, we still would not have enough. Where could we turn next? To the oceans! All we'd have to do to make use of the vast amount of sea-water is—remove the salt. This salt-removing process is already in use in many parts of the world.

单选题Creating a World Without Smoking Smoking will be banned in all pubs, clubs and workplaces from next year after historic votes in the Commons last night. After last-minute appeals from health campaigners, MPs opted for a blanket prohibition which will start in summer 2007, ending months of argument over whether smokers should be barred in pubs and restaurants only. They voted to ban smoking in all pubs and clubs by 384 to 184, a surprisingly large majority of 200. Smoking will still be allowed in the home and in places considered to be homes, such as prisons, care homes and hotels. Smokers lighting up in banned areas will face a fixed penalty notice ￡50 and spot fines of ￡200 will be introduced for failing to display no-smoking signs, with the possible penalty, if the issue goes to court, increasing to ￡1,000. Caroline Flint, the Public Health Minister, also announced that the fine for failing to stop people smoking in banned areas would be increased to ￡2,500—more than ten times the ￡200 originally proposed. The Bill also allows the Government to increase the age for buying cigarettes. Ministers will consult on raising it from 16 to 18. The Bill now goes to the Lords but will be through by the summer recess. Even a plan to allow smoking to continue in private clubs was thrown out as MPs on all sides were given permission to vote with their conscience rather than on a party line. Patricia Hewitt, the Health Secretary, said the Health Bill would ban smoking in "virtually every enclosed public place and workplace" in England and save thousands of lives a year. Smoke-free workplaces and public places "will become the norm". She said: "An additional 600,000 people will give up smoking as a result of this law and millions more will be protected from second—hand smoke." Peter Hollies, director-general of the British Heart Foundation, said: "The vote is a landmark victory for the public health of this country and will save the lives of many people."

单选题The conference explored the possibility of closer trade links.

单选题If so, the next census in 2021 could show the beginning of a shift towards normality.

单选题The 1960's saw a change in the form and content of movies, treating subjects that for so many years were considered taboo. A．unpleasant B．prohibited C．unethical D．worthless

单选题下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 The Science of Persuasion If leadership consists of getting things done through others, then persuasion is one of the leader's essential tools. Many executives have assumed that this tool is beyond their grasp, available only to the charismatic (有魅力的) and the eloquent. Over the past several decades, though, experimental psychologists have learned which methods reliably lead people to concede, comply, or change. Their research shows that persuasion is governed by several principles that can be taught and applied. The first principle is that people are more likely to follow someone who is similar to them than someone who is not. Wise managers, then, ask peers to help make their cases. Second, people are more willing to cooperate with those who are not only like them but who like them, as well. So it's worth the time to uncover real similarities and offer genuine praise. Third, experiments confirm the intuitive truth that people tend to treat you the way you treat them. It's sound policy to do a favor before seeking one. Fourth, individuals are more likely to keep promises they make voluntarily and clearly. The message for managers here is to get commitments in writing. Fifth, studies show that people really do defer to(服从) experts. So before they attempt to exert influence, executives should take pains to establish their own expertise and not assume that it's self-evident. Finally, people want more of a commodity when it's scarce; it follows, then, that exclusive information is more persuasive than widely available data.

单选题Because the sale of bonds is a convenient means of raising capital, corporations often issue bonds as well as stocks.

单选题George Strong was a very creative engineer.

单选题 Sleep We all know that the normal human daily cycle of activity is of some 7-8 hours' sleep alternating with some 16-17 hours' wakefulness and that, broadly speaking, the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can be modified. The question is no more academic one. The case, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls insistently for round the clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 a.m. one week, 8 a.m. to 4 p.m. the next, and 4 p.m. to 12 midnight the {{B}}third{{/B}} and so on. This means that no sooner has he got used to one routine than he has to change to {{B}}another{{/B}}, so that much of his time is spent neither working nor sleeping very efficiently. One answer would seem to be longer periods on each shift, a month, or even three months. Recent research by Bonier of the Netherlands, however, has shows that people on such systems will revert to their normal habits of sleep and wakefulness during the weekend and that this is quite enough to destroy any adaptation to night work built up during the week. The only real solution appears to be to hand over the night shift to a corps of permanent night workers whose nocturnal wakefulness may persist through all weekend and holidays. An interesting study of the domestic life and health of night shift workers was carried out by Brown. She found a high incidence of disturbed sleep, digestive disorder and domestic disruption among those on alternating day and night shifts, but no abnormal occurrence of these symptoms among those on permanent night work.

单选题She's extremely competent and industrious.

单选题Operation Migration If you look up at the sky in the early fall in the northern part of North America, you may see groups of birds. These birds are flying south to places where they can find food and warmth for the winter. They are migrating (迁徙). The young birds usually learn to migrate from their parents. They follow their parents south. In one unusual case, however, the young birds are following something very different. These birds are young whooping cranes, and they are following an airplane! The whooping crane is the largest bird that is native to North America. These birds almost disappeared in the 1800s. By 1941, there were only about 20 cranes alive. In the 1970s, people were worried that these creatures were in danger of disappearing completely. As a result, the United States identified whooping cranes as an endangered species that they needed to protect. Some researchers tried to help. They began to breed whooping cranes in special parks to increase the number of birds. This plan was successful. There were a lot of new baby birds. As the birds became older, the researchers wanted to return them to nature. However, there was a problem: These young birds did not know how to migrate. They needed human help. In 2001, some people had a creative idea. They formed an organization called Operation Migration. This group decided to use very light airplanes, instead of birds, to lead the young whooping cranes on their first trip south. They painted each airplane to look like a whooping crane. Even the pilots wore special clothing to make them look like cranes. The cranes began to trust the airplanes, and the plan worked. Today, planes still lead birds across approximately 1,200 miles (1,931 kilometers), from the United States- Canadian border to the Gulf of Mexico. They leave the birds at different sites. If a trip is successful, the birds can travel on their own in the future. Then, when these birds become parents, they will teach their young to migrate. The people of Operation Migration think this is the only way to maintain the whooping crane population. Operation Migration works with several other organizations and government institutes. Together, they assist hundreds of cranes each year. However, some experts predict that soon, this won"t be necessary. Thanks to Operation Migration and its partners, the crane population will continue to migrate. Hopefully, they won"t need human help anymore.

单选题She is a highly successful teacher.

单选题The river widens considerably as it begins to turn east.

单选题Joan's {{U}}prediction{{/U}} that there would be an earthquake dismayed her friends.

单选题Medical Journals Medical journals are publications that report medical information to physicians and other health professionals. In the past, these journals were available only in print. With the development of electronic publishing, many medical journals now have web sites on the Internet, and some journals are published only online. A few medical journals, like the Journal of the American Medical Association, are considered general medical journals because they cover many fields of medicine. Most medical journals are specialty journals that focus on a particular area of medicine. Medical journals publish many types of articles. Research articles report the results of research studies on a range of topics varying from the basic mechanisms of diseases to clinical trials that compare outcomes of different treatments. Review articles summarize and analyze the information available on a specific topic based on a careful search of the medical literature. Because the results of individual research studies can be affected by many factors, combining results from different studies on the same topic can be helpful in reaching conclusions about the scientific evidence for preventing, diagnosing or treating a particular disease. Case conferences and case reports may be published in medical journals to educate physicians about particular illnesses and how to treat them. Editorials in medical journals are short essays that express the views of the authors, often regarding a research or review article published in the same issue. Editorials provide a perspective on how the current article fits with other information on the same topic. Letters to the editor provide a way for readers of the medical journal to express comments, questions or criticisms about articles published in that journal.

单选题He expressed concern that the ship might be in danger.A. worryB. difficultiesC. needD. danger

单选题It seems highly unlikely that she will pass the exam.

单选题If the weatherman has predicted {{U}}accurately{{/U}}, tomorrow will be a perfect day for our picnic.

单选题The ability to react to environmental stimuli is a basic and general characteristic of living organisms.

单选题Three straight lines meeting at three points constitute a triangle.A. center onB. come down toC. consist ofD. form