单选题He purchased a ticket and went up on the top deck.

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。{{B}}第一篇{{/B}} {{B}}Cigars Instead?{{/B}} Smoking one or two cigars a day doubles the risk of cancers of the lip, tongue, mouth, and throat, according to a government study. Daily cigars also increase the risk of lung cancer and cancer of the esophagus, and increase the risk of cancer of the larynx (voicebox) sixfold, say researchers at the National Cancer Institute in Bethesda, Maryland. In addition, the report revealed that smoking three or four cigars a day increased the risk of oral cancer to 8.5 times the risk for nonsmokers and the risk of esophageal cancer by four times the risk of nonsmokers. The health effects of smoking cigars is one of eight sections of the article "Cigars: Health Effects and Trends". The researchers report that, compared with a cigarette, a large cigar emits up to 90 times as much carcinogenic tobacco-specific nitrosamines. "This article provides clear and invaluable information about the disturbing increase in cigar use and the significant public health consequences for the country," said Dr. Richard Klausner, director of the National Cancer Institute, in a statement. "The data are clear — the harmful substances and carcinogens in cigar smoke, like cigarettes, are associated with the increased risks of several kinds of cancers as well as heart and lung diseases," he added. "In other words, cigars are not safe alternatives to cigarettes and may be addictive." "To those individuals who may be thinking about smoking cigars, our advice is — don't. To those currently smoking cigars, quitting is the only way to eliminate completely the cancer, heart and lung disease risks," warned Klausner. According to a National Cancer Institute press release, there haven't been any studies on the health effects on nonsmokers at cigar social events, but "... a significant body of evidence clearly demonstrates an increased lung cancer risk from secondhand smoke."

单选题The {{U}}notion{{/U}} of the "quality circle" first found widespread acceptance in Japan.

单选题He was (weary) of the constant battle between them.

单选题Which of the following is NOT the writer's purpose of knitting?

单选题The government has ordered 195 million doses of vaccine, 45 million of which will be delivered by mid - October. But because most people lack prior immunity to the new H1N1 virus, officials expect that two injections will probably be necessary, spaced three weeks apart. Clinical trials are currently underway to confirm whether two shots are actually needed and to determine the optimal dose. Resuhs from those trials will be available in late September or early October. But even after receiving the vaccine, a person will take at least five weeks to develop full immunity. Two injections of the vaccine will probably necessary because.A. there are more than enough doses of vaccine for all Americans.B. people will develop full immunity right after two injections.C. a single injection will not enable people to develop immunity.D. most people lack prior immunity to the new H1 N1 virus.

单选题What Is Market? The word market is used in a number of ways. There is a stock market and an automobile market, a retail market for furniture and a wholesale market for furniture. One person may be going to the market: another may plan to market a product. What, then is a market? A market may be defined as a place where buyers and sellers meet, goods or services are offered for sale. and transfers of ownership occur. A market may also be defined as the demand made by a certain group of potential buyers for a good or service. For instance, there is a farm market for petroleum products. The terms market and demand are often used interchangeably; they may also be used jointly as market demand. These definitions are not sufficiently precise to be useful to us here. For business purposes we define a market as people or organizations with wants (needs) to satisfy, money to spend, and the willingness to spend it. Thus in the market demand for any given product or service, there are three factors to consider—people or organizations with wants(needs),their purchasing power, and their buying behavior. We shall employ the dictionary definition of needs: the lack of anything that is required, desired, or useful. We do not limit needs to the narrow physiological requirements of food, clothing and shelter essential for survival. In our discussion the words needs and wants are used synonymously and interchangeably. In a strict interpretation, however, needs would refer to such basic physiological requirements as food, clothing, and shelter, while wants would be non-basic preferences. However, in our affluent society, little is to be gained by trying to differentiate between the two. Many of us would see as needs some items that are far beyond food, clothing, and shelter.

单选题 阅读下面的短文，文中有15处空白，每处空白给出4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 Happily married people have lower blood pressure{{U}} (51) {{/U}}unhappily married people or singles, a Brigham Young University study says. On the other hand, even having a supportive social network did not translate into a blood pressure benefit for singles or unhappily{{U}} (52) {{/U}}people , according to the study. "There seem to be some unique health benefits from marriage. It's not just being married{{U}} (53) {{/U}}benefits health--what's really the most protective of health is having a happy{{U}} (54) {{/U}})" study author Julianne Holt Lunstad, a psychologist who specializes in relationships and health, said in a prepared statement. The study included 204 married and 99{{U}} (55) {{/U}} adults who wore portable blood-pressure monitors for 24 hours. The{{U}} (56) {{/U}} recorded blood pressure at random intervals and provided a total of about 72 readings. "We wanted to capture participants' blood pressure doing whatever they normally{{U}} (57) {{/U}}in everyday life. Getting one or two readings in a clinic is not really{{U}} (58) {{/U}}of the fluctuations that occur throughout the day," Holt-Lunstad said. Overall, happily married people scored four points{{U}} (59) {{/U}}on the blood pres- sure readings than single adults. The study also found that blood{{U}} (60) {{/U}}among married people—especially those in happy marriages{{U}} (61) {{/U}} more during sleep than in single people. "Research has shown that people whose blood pressure remains high throughout the night are at{{U}} (62) {{/U}}greater risk of heart disease than people whose blood pressure drops," Holt Lunstad said. The study was published in the March 20{{U}} (63) {{/U}}of the journal Annals of Behavioral Medicine. The study also found that unhappily married adults have higher blood pressure than {{U}}(64) {{/U}}happily married and single adults. Holt-Lunstad noted that married couples can encourage healthy habits in one{{U}} (65) {{/U}}such as eating a healthy diet and having regular doctor visits. People in happy marriages also have a source of emotional support, she said.

单选题The world champion suffered a Usensational/U defeat.

单选题Physical Exercise Declaring that physical exercise is one of the most powerful medicines to help improve our quality of life is not an exaggeration. The World Health Organization expressed the same view in its 2002 World Heath Report, emphasizing that the damage produced by lack of physical activity was equal to the strong probability of serious illness such as heart disease and even some kinds of cancer. Those who have embraced an active lifestyle for years are familiar with the sort of physical and psychological benefits that come from exercise. Nevertheless a lot of people would never think of physical activity as a way of feeling better, simply because they don"t think they are in need of it, or because they are lazy or maintain that they haven"t got enough time. There are many positive effects that result from physical exercise and they are not only concerned with the physical aspects but also psychological and social ones. Beginning with the physical benefits, physical activity improves the life of the heart, burns off fat, lowers high blood pressure, makes tissues more resistant, and increases muscle flexibility and joint mobility. On a psychological level, physical activity helps reduce anxiety and stress by causing tension to disappear and by encouraging us to have a better sense of ourselves through listening to our bodies during movement. Lastly, seeing ourselves in better health is advantageous socially. The sense of satisfaction thus obtained will result in an increase of self-respect and serf-confidence in terms of our ability to interact with others. The benefits linked to exercise have also not gone unnoticed in the business world, with more and more companies setting up gyms on-site. Employees" improved health translates into better performance and reduced costs as well as an increase in people"s satisfaction in the workplace. Physical activity is recommended for all age groups, including children. It is an important growth factor in a child"s education. And for the elderly? There is no doubt that regular physical activity allows greater efficiency in daily life as well as creating more basic independence day by day, including the possibility of keeping in touch with others and not feeling isolated.

单选题Black Americans are more likely to die of cancer than

单选题Nightingale's parents did not approve of her decision

单选题Unidentified Flying Object Unidentified Flying Object (UFO) is any object or light, reportedly sighted in the sky, that cannot be immediately explained by the observer. Sightings of unusual flying objects date back to ancient times, but UFOs (sometimes called flying saucers) became widely discussed only after the first widely publicized U. S sighting in 1947. Many thousands of such observations have since been reported worldwide. At least 90 percent of UFO sightings can be identified as conventional objects, although time—consuming investigations are often necessary for such identification. The objects most often mistaken for UFOs are bright planets and stars, aircraft, birds, balloons, kites, aorial flares, peculiar clouds, meteors, and satellites. The remaining sightings most likely can be attributed to other mistaken sightings or to inaccurate reporting, tricks, or delusions, although to disprove all claims made about UFOs is impossible. From 1947 to 1969 the U. S. Force investigated UFOs as a possible threat to national security. A total of 12,618 reports were received, of which 701 reports, or 5.6 percent, were listed as unexplained. The air force concluded that "no UFO reported, investigated, and evaluated by the Air Force has ever given any indication of threat to our national security". Since 1969 no agency of the U.S. government has had any active program of UFO investigation. Some persons, however, believe that UFOs are extraterrestrial spacecraft, even though no scientifically valid evidence supports that belief. The possibility of extraterrestrial civilizations is not the stumbling block; most scientists grant that intelligent life may well exist elsewhere in the universe. A fully convincing UFO photograph has yet to be taken, however, and the scientific method requires that highly speculative explanations should not be adopted unless all of the more ordinary explanations can be ruled out. UFO enthusiasts persist, however, and some persons even claim to have been captured and taken aboard UFOs. No one has produced scientifically acceptable proof of these claims. Behavioral scientist Carl Sagan once proposed that "certain psychological needs are met by belief in superior beings from other worlds. /

单选题Henry cannot resist the {{U}}lure{{/U}} of drugs

单选题There was ample time to get to the airport.

单选题He spoke in a {{U}}temperate{{/U}} manner, not favoring either side especially.

单选题That performance was （pretty） impressive.

单选题These factors interact intimately and cannot be separated.

单选题Please watch the milk carefully; I don't want it to {{U}}boil{{/U}} over.

下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～?段名其中4段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。 {{B}}Screen Test{{/B}}1. Every year millions of women are screened with X-rays to pick up signs of breast cancer. If this happens early enough, the disease can often be. treated successfully. According to a survey published last year, 21 countries have screening programmes. Nine of them, including Australia, Canada, the US and Spain, screen women under 50.2. But the medical benefits of screening these younger women are controversial, partly because the radiation brings a small risk of inducing cancer. Also, younger women must be given higher doses of X-rays because their breast tissue is denser.3. Researchers at the Polytechnic University of Valencia analysed the effect of screening more than 160,000 women at 11 local clinics. After estimating the women's cumulative dose of radiation, they used two models to calculate the number of extra cancers this would cause.4. The mathematical model recommended by Britain's National Radiological Protection Board (NRPB) predicted that the screening programme would cause 36 cancers per 100,000 women, 18 of them fatal. The model preferred by the UN Scientific Committee on the Effects of Atomic Radiation led to a lower figure of 20 cancers.5. The researchers argue that the level of radiation-induced cancers is "not very significant" compared to the far larger number of cancers that are discovered and treated. The Valencia programme, they say, detects between 300 and 450 cases of breast cancer in every 100,000 women screened.6. But they point out that the risk of women contracting cancer from radiation could be reduced by between 40 and 80 percent if screening began at 50 instead of 45, because they would be exposed to less radiation. The results of their study, they suggest, could help "optimise the technique" for breast cancer screening.7. "There is a trade-off between the diagnostic benefits of breast screening and its risks," admits Michael Clark of the NRPB. But he warns that the study should be interpreted with caution. "On the basis of the current data, for every 10 cancers successfully detected and prevented there is a risk of causing one later in life. That's why radiation exposure should be minimized in any screening programme."