单选题Although he has had no formal education, he is one of the ______ businessmen in the company.

单选题Professor Wang, ______ for his informative lectures, was warmly received by his students. A. knowing B. known C. to be known D. having known

单选题The bad and damp weather in the hot area would enable the plants to get______quickly. A. decomposed B. denounced C. detached D. deduced

单选题Regardless of the source or kind of light, the ability of light to form an image is dependent upon just one thing--a small hole or a lens to bring the rays to a focus. The principle of image formation was discovered in early Greek Times. Later it was realized that the eye itself has a lens and that an image is, in fact, formed on the retina, the rear inside surface of the eyeball. Some man inside a cave or a darkened room noticed that light entering through a small hole in the wall formed an image on the far wall. It was observed that if you enlarge the hole, the image blurred and disappeared. On the other hand, the smaller the hole, the sharper the image-down to a certain diameter after which making the hole smaller makes the image worse again. The function of a pinhole is to screen out all light rays except those coming in a perfectly straight line from the object, thus improving the sharpness of the image. After passing through a point the rays again spread out a little bit, and the size of the image formed will depend upon how far back the wall, screen, or film is from the pinhole. The full exploitation of this phenomenon had to wait for the development of the lens, which gathered in a much larger number of light rays and still brought them to form an image, just as the pinhole did, but with a difference: in a pinhole camera, the light rays form an image that is equally sharp regardless of the distance to the film. When a lens is used, there may be a choice of planes of focus determined by adjusting the lens-to-film distance. Each plane is located some distance behind and relatively parallel to the lens. Actual blown glass was developed early in Egyptian times, and the first lens may have been the bottom of a wine bottle. However, the first deliberate grinding of lenses did not take place until the thirteenth century, and the art did not become established until the sixteenth century. A book on the grinding and polishing of lenses was issued by B. Battista della Porta in 1589, but it was not until 1611 that Kepler compared a lens of glass to the lens in the eye and showed that rays from each point of an object were brought to a focus at each corresponding point of an image on the retina. Then, in 1619, Scheiner demonstrated the actual formation of an inverted image on the retina.

单选题Shoppers who have flocked to online stores for their holiday shopping are losing privacy with every mouse click, according to a new report. The study by the Washington-based Electronic Privacy Information Center scrutinized privacy policies on 100 of the most popular online shopping sites and compared those policies with a set of basic privacy principles that have come to be known as "fair information practices". The group found that none of the 100 sites met all of the basic criteria for privacy protection, which include giving notice of what information is collected and how it is used, offering consumers a choice over whether the information will be used in certain ways, allowing access to data that give consumers a chance to see and correct the information collected, and instituting the kind of security measures that ensure that information won"t fall into the wrong hands. "This study shows that somebody else, other than Santa, is reading your Christmas list," said Jeff Chester, executive director of the Center for Media Education, which also worked on the survey. The online privacy of children is protected by Federal Trade Commission rules, but adults do not share the same degree of privacy protection. The movement, like the online shopping industry, favors self-regulation over imposition of further movement restrictions on electronic commerce. Marc Rosenberg, executive director of the privacy group, said the study shows that self regulations have failed, "We need legislation to enforce fair information practices," he said, "Consumers are at greater risk than they were in 1997," when the group released its first report. The survey also asked whether the 100 sites used "profile-based" advertising, and whether the sites incorporate "cookies" technology, which gives Websites basic information on visitors. Profiling is the practice of gathering in then used to create targeted advertising on Websites. All but 18 of the top shopping sites did display a privacy policy, a major improvement over the early days of electronic commerce, when such policies were scarce. But that did not satisfy the privacy group. "Companies are posting privacy policies, but these policies are not the same thing as fair information practices," Rosenberg said. The sites also did not perform well by other measures, the group said it found that 35 of the sites feature profile-based advertising, and 87 percent use cookies. The group concluded that the phonies that were posted "are typically confusing, incomplete, and inconsistent". The report, "Surfer Beware Ⅲ: Privacy Policies Without Privacy Protection," is the third such survey by the group. It called for further development of technologies that help consumers protect their privacy and even anonymity when exploring the Internet.

单选题Mr.Dane went through his daughter's essay carefully, to eliminate slang words from it(2004年秋季电子科技大学考博试题)

单选题As a result of the strike, the Government is urging people to be ______ with electricity.

单选题The great chariot of society, which for so long had run down the gentle slope of tradition, now found itself powered by an internal combustion engine. Transactions and gain 51 a new and startling 52 force. What forces could have been 53 powerful to smash a comfortable and 54 world and institute in its place this new society? There was no single massive 55 . It was not great events, single adventures, individual laws, or charming 56 which 57 about the economic revolution. It was a process of internal growth. First, there was the gradual emergence of national political 58 in Europe. A second great current of change was to be found in the slow decay of the religious spirit under the 59 of the skeptical, inquiring, humanist views of the Italian Renaissance. Still another 60 current lies in the slow social changes that eventually rendered the market system possible. In the course of this change, power naturally began to gravitate into the hands of those who understood money matters--the merchants.

单选题The report also examined the overall effectiveness of the 43-day bombing campaign carried out by coalition forces and Congress released a brief synopsis to the public.

单选题The realization of all the potential profits ______ depends on sufficient spending by employers, by the government or by those purchasing exports. A. intimately B. universally C. ultimately D. instinctively

单选题The idea of time is Uincorporated/U in all languages of the world.

单选题The meaning of "Clinton dances into his office with a week-long multimillion-dollar party full of stars, saxophone music and presidential hugs" in the first paragraph is: ______.

单选题Adolescents are taking longer to become fully productive members of society, Reed Larson, professor of human development, University of Illinois, Champaign, told the World Future Society, Bethesda, Md. "What we expect of young people is (21) ," he argued. They must go to school for 12 years or longer without any (22) that their education will mean career success or relevance when they become adults. (23) , they do so without financial rewards, accept an identity (24) by society, and delay starting a family, all of (25) keeps adolescents in a kind of indeterminate state for years. Larson says that "There should be way stations along the climb (26) adulthood that allow young people to rest, gather themselves, and consider (27) . " The success of government, business, and private life in the next 50 years (28) it. Education, literacy, and versatile interpersonal skills (29) the list of necessary preparations for adulthood. Young people negotiating the complex worlds of home, work, and school (30) use these skills in order to do so (31) and competently. "The adolescent who is able to (32) in only one world is increasingly (33) for adult life, " he warns. As the time spent on the road to adulthood increases, so (34) the danger that more youths will fall by the wayside. New and increased opportunities and initiatives will keep more youngsters focused, (35) a smarter, more-versatile generation able to cope with the emerging global, high-tech world.

单选题Long treatment of the elderly drains funds from the health needs of other groups and from urgent social problems.

单选题Imagine a world in which there was suddenly no emotion—a world in which human beings could feel no love or happiness, no terror or hate. Try to imagine the consequences of such a transformation. People might not be able to stay alive: knowing neither joy nor pleasure, anxiety nor fear. they would be as likely to repeat acts that hurt them as acts that were beneficial. They could not learn: they could not benefit from experience because this emotionless world would tack rewards and punishments. Society would soon disappear: people would be as likely to harm one another as to provide help and support. Human relationships would not exist: in a world without friends or enemies, there could be no marriage, affection among companions, or bonds among members of groups. Society's economic underpinnings would be destroyed: since earning $10 million would be no more pleasant than earning $10, there would be no incentive to work. In fact, there would be no incentives of any kind. For as we will see, incentives imply a capacity to enjoy them. In such a world, the chances that the human species would survive are next to zero, because emotions are the basic instrument of our survival and adaptation. Emotions structure the world for us in important ways. As individuals, we categorize objects on the basis of our emotions. True, we consider the length, shape, size, or texture, but an object's physical aspects are less important than what it has done or can do to us—hurt us, surprise us, anger us or make us joyful. We also use categorizations colored by emotions in our families, communities, and overall society. Out of our emotional experiences with objects and events comes a social feeling of agreement that certain things and actions are "good" and others are "bad", and we apply these categories to every aspect of our social life—from what foods we eat and what clothes we wear to how we keep promises and which people our group will accept. In fact, society exploits our emotional reactions and attitudes, such as loyalty, morality, pride, shame, guilt, fear and greed, in order to maintain itself. It gives high rewards to individuals who perform important tasks such as surgery, makes heroes out of individuals for unusual or dangerous achievements such as flying fighter planes in a war, and uses the legal and penal system to make people afraid to engage in antisocial acts.

单选题The love that ______ takes up residence in the soul and helps complete us.

单选题All the three TV channels provide extensive_____of sports events.

单选题When her rival died, she ______a grief she did not feel.