单选题We cannot go on quarrelling like this.A. chooseB. prepareC. continueD. advise

单选题Advertising Who won the World Cup 1994 football game? What happened at the United Nations? How did the critics like the new play? (51) an event takes place, newspapers are on the streets (52) the details. Wherever anything happens in the world, reports are on the spot to (53) the news. Newspapers have one basic (54) , to get the news as quickly as possible from its source, from those who make it to those who want to (55) it. Radio, telegraph, television, and (56) inventions brought competition for newspapers. So did the development of magazines and other means of cormmunication. (57) , this competition merely spurred the newspapers on. They quickly made use of the newer and faster means of communication to improve the (58) and thus the efficiency of their own operations. Today more newspapers are (59) and read than ever before. Competition also led newspapers to branch outs into so many other fields. Besides keeping readers (60) of the latest news, today's newspapers (61) and influence readers about politics and other important and serious matters. Newspapers influence readers' economic choices (62) advertising. Most newspapers depend on advertising for their very (63) . Newspapers are sold at a price that (64) even a small fraction of the cost of production. The main (65) of income for most newspapers is commercial advertising.

单选题The manager got angry just because his secretary was ten minutes late.

单选题The phrase "wary of" in paragraph 8 could be best replaced by

单选题Look for Friendship in Cyberspace In so many ways, cyberspace mirrors the real world. People ask for information, play games, and share hobby tips. Others buy and sell products. Still others look for friendship, or even love. Unlike the real world, however, your knowledge about a person is limited to words on a computer screen. Identity and appearance mean very little in cyberspace, so even the shyest person can become a chat-room star. Usually, this "faceless" communication doesn't create problems. Identity doesn't really matter when you're in a chat room discussing politics or hobbies. In fact, this emphasis on the ideas them selves makes the Internet a great place for exciting conversation. Where else can so many people come together to chat? But some Internet users want more than just someone to chat with. They're looking for serious love relationships. Is cyberspace a good place to find love? That answer depends on whom you ask. Supporters of online relationships claim that the Internet allows couples to get to know each other intellectually first. Personal appearance doesn't get in the way. But critics of online relationships argue that no one can truly know another person in cyberspace. Why? Because the Internet gives users a lot of control over how others view them. Internet users can carefully craft their words to fit whatever image they want to give. In a sense, they're not really themselves. All of this may be fine if the relationship stays in cyberspace But not knowing a person is a big problem in a love relationship. This inevitably leads to disappointment when couples meet in person. So, before looking for love in cyberspace, remember the advice of Internet pioneer Clifford Stoll: "Life in the real world is far richer than anything you'll find on a computer screen. /

单选题{{B}}第二篇{{/B}} Cigars Instead 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 (voice box) six fold , 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 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 invalidating information about the disturbing increases in cigar use and the significant public health consequences for the country. " said Dr. Richard Riausner, 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. Tothose 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 releases , 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 majority of people around here are Udecent/U.

单选题The purpose of the passage is to tell the reader

单选题{{B}}第二篇{{/B}} {{B}} Common Problems, Common Solutions{{/B}} The chances are that you made up your mind about smoking a long time ago--and decided it's not for you. The chances are equally good that you know a lot of smokers--there are, after all about 60 million of them, work with them, and get along with them very well. And finally it's a pretty safe bet that you're open-minded and interested in all the various issues about smokers and nonsmokers--or you wouldn't be reading this. And those three things make you incredibly important today. Because they mean that yours is the voice--not the smoker's and not the anti-smoker's-- that will determine how much of society's efforts should go into building walls that separate us and how much into the search for solutions that bring us together. For one tragic result of the emphasis on building walls is the diversion of millions of dollars from scientific research on the causes and cures of diseases which, when all is said and done, still strike the nonsmoker as well as the smoker. One prominent health organization, to cite but a single instance, now spends 28 cents of every publicly contributed dollar on "education" (much of it in anti-smoking propaganda) and only 2 cents on research. There will always be some who want to build walls, who want to separate people from people, and up to a point, even these may serve society. The anti-smoking wall-builders have, to give them their due, helped to make us all more keenly aware of choice. But our guess, and certainly our hope, is that you are among the far greatest number who know that walls are only temporary at best, and that over the long run, we can serve society's interest better by working together in mutual accommodation. Whatever virtue walls may have, they can never move our society toward fundamental solutions. People who work together on common problems, common solutions, can.

单选题Recent pressure at work may account for his behavior.

单选题Techniques to {{U}}employ{{/U}} the energy of the sun are being developed.

单选题The bodies of Burke's and Ham's victims couldn't be found by the police because

单选题The room is dim and quiet.

单选题 Stress at Work and Still Healthy The term could yet become the word of the year: stress is on everyone's lips these days and everywhere. Not only managers, officials and teachers are complaining nowadays, housewives, children and pensioners now also have their own problems. They too sacrifice themselves for others, feel under- or overworked and quickly lose their inner balance. Irritation, tiredness and exhaustion quickly follow. But that is only the negative aspect. Stress, after all, is also linked to positive terms such as joy of life, tension and vitality (活力). "Firstly, stress is healthy," says Wolfgang Stehling from Eltvelle. The doctor and management consultant says: "It occurs when the body loses its inner balance, but then stress hormones are produced to re-establish the balance." Thus stress is nothing more than a positive reaction of the body to pressure. It is unavoidable as part of our nature: "There is no such thing as a stress-free life." But whether stress leads to tensions in the mind or to tenseness of the muscles depends on the duration (持续时间), its cause or causes and the sufferer's personal situation. People who have trouble sleeping or suffer from bad moods or simply the flu will not be on top of the world and will take every little strife as negative stress. Others, people who feel refreshed at every new turn, are relaxed and successful, will view a difficult round of negotiations or competition at work more as a positive challenge than a cross to bear. Exercise, healthy eating and relaxation are thus the three pillars by which stress can be conquered almost every time. These factors form a unit, explains Marita Voelker-Albert, spokeswoman for the government's Nutrition Advice Center in Cologne. Its campaign "Gut Drauf" (Feeling Good) is targeted at young people. The government agency's research suggests that three out of four adolescents feel tired, overtaxed (负担过重) and under stress. Eating disorders and complaints such as migraines (偏头痛) and indigestion (消化不良), nervousness and concentration problems have increased among 12-to 16-year-olds. But even the best solutions don't work if they are not put into practice, says Stehling. Anybody who goes jogging regularly, practices yoga (瑜伽功) and prescribes good literature as a cure for negative stress, may well end up under more pressure as he tries to find the time for it all. Sometimes, says the consultant, it helps to take time out to reduce stress levels over a weekend.

单选题 Eat More, Weigh Less, Live Longer Clever genetic detective work may have found out the reason why a near starvation diet prolongs the life of many animals. Ronald Kahn at Harvard Medical School in Boston, US, and his colleagues have been able to extend the lifespan (寿命) of mice by 18 per cent by blocking the rodent's (啮齿动物) increase of fat in specific cells. This suggests that thinness—and hot necessarily diet—promotes long life in "calorie (热量卡) restricted" animals. "It's very cool work." says aging researcher Cynthia Kenyon of the University of California, San Francisco. "These mice eat all they want, lose weight and live longer. It's like heaven." Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents. Whether this works in humans is still unknown, partly because few people are willing to submit to such a strict diet. But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life. One theory is that eating less reduces the increase of harmful things that can damage cells. But Kahn's team wondered whether the animals simply benefit by becoming thin. To find out, they used biology tricks to disrupt the insulin (胰岛素) receptor (受体) gene in lab mice—but only in their fat cells. "Since insulin is needed to help fat cells store fat, these animals were protected against becoming fat," explains Kahn. This slight genetic change in a single tissue had dramatic effects. By three months of age, Kahn, those modified mice had up to 70 per cent less body fat than normal control mice, despite the fact that they ate 55 per cent more food per gram of body weight. In addition, their lifespan increased. The average control mouse lived 753 days, while the thin rodents averaged a lifespan of 887 days. After three years, all the control mice had died, but one-quarter of the modified rodents were still alive. "That they get these effects by just manipulating the fat cells is controversial," says Leonard Guarente of the Massachusetts Institute of Technology, who studies calorie restriction and aging. But Guarente says Kahn has yet to prove that the same effect is responsible for increased lifespan in calorie restricted animals. "It might be the same effect or there might be two routes to long life," he points out, "and that would be very interesting."

单选题Don't get {{U}}slack{{/U}} at you work.

单选题Be Alert to Antimicrobial(抗微生物的)Resistance The ability of micro-organisms to find ways to avoid the action of the drugs used to cure the infections they cause is increasingly recognized as a global public health issue. Some bacteria have developed mechanisms which make them resistant to many of the antibiotics(抗生素 ) normally used for their treatment. They are known as multi-drug resistant bacteria, posing particular difficulties, as there may be few or no alternative options for therapy. They constitute a growing and global public health problem. WHO suggests that countries should be prepared to implement hospital infection control measures to limit the spread of multi-drug resistant strains(菌株)and to reinforce national policy on prudent use of antibiotics, reducing the generation of antibiotic resistant bacteria. An article published in The Lance! Infectious Diseases on 11 August 2010 identified a new gene that enables some types of bacteria to be highly resistant to almost all antibiotics. The article has drawn attention to the issue of antimicrobial resistance, and, in particular, has raised awareness of infections caused by multi-drug resistant bacteria. While multi-drug resistant bacteria are not new and will continue to appear, this development requires monitoring and further study to understand the extent and modes of transmission, and to define the most effective measures for control. Those called upon to be alert to the problem of antimicrobial resistance and take appropriate action include consumers, managers of hospitals, patients, as well as national governments, the pharma-ceutical(制药的) industry and international agencies. WHO strongly recommends that governments focus control and prevention efforts in the following areas like surveillance for antimicrobial resistance; rational antibiotic use, including education of healthcare workers and the public in the appropriate use of antibiotics; introducing or enforcing legislation related to stopping the selling of antibiotics without prescription; and strict adherence to infection prevention and control measures, including the use of hand-washing measures, particularly in healthcare facilities. Successful control of multidrug-resistant microorganisms has been documented in many countries, and the existing and well-known infection prevention and control measures can effectively reduce transmission of multi-drug resistant organisms if systematically implemented. WHO will continue to support countries to develop relevant policies, and to coordinate international efforts to combat antimicrobial resistance. Antimicrobial resistance will be the theme of WHO's World Health Day 2011.

单选题Laster beams can be used to {{U}}bore{{/U}} metals and other hard materials. A. trim B. melt C. drill D. slice

单选题The {{U}}hands{{/U}} of the clock showed that it was time for dinner.

单选题The trumpet was part of the opera orchestra long before it became a standard orchestral instrument.A. majorB. tunefulC. desirableD. regular