单选题George applied for the position three times______he finally got it. A．after B．before　 C．until D．when

单选题How is it possible for our human body to {{U}}convert{{/U}} yesterday's lunch into today's muscle?

单选题Neon light is utilized in airport because it can {{U}}permeate{{/U}} fog. A. pass through B. transmit C. suspend D. break up

单选题Last summer we visited the West Lake, ______ Hangzhou is famous in the world.A. for whichB. for thatC. in whichD. what

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单选题 It is hard to predict how science is going to turn out, and if it is really good science it is impossible to predict. If the things to be found are actually new, they are by definition unknown in advance. You cannot make choice in that matter. You either have science or you don't have, and if you have it you are obliged to accept the surprising and disturbing pieces of information, along with the neat and promptly useful bits. The only solid piece of scientific truth about which I feel totally confident is that we are profoundly ignorant about nature. I regard this as the maj or discovery of the past hundred years of biology. It is, in its way, an illuminating piece of news. It would have amazed the brightest minds of the 18th century Enlightenment to be told by any of us how little we known and how bewildering seems the way ahead. It is this sudden confrontation with the depth and scope of ignorance that represents the most significant contribution of the 20th century science to the human intellect. In earlier times, we either pretended to understand how things worked or ignored the problem, or simply make up stories to fill the gaps. Now that we have begun exploring in eamest, we are getting glimpses of how huge the questions are, and how far they are from being answered. Because of this, we are depressed. It is not so bad being ignorant if you are totally ignorant. The hard thing is knowing in some detail the reality of ignorance, the worst spots and here and there the not-so-bad spots, but no true light at the end of the tunnel nor even any tunnels that can yet be trusted. But we are making a beginning, and there ought to be some satisfaction. There are probably no questions we can think up that can't be answered, sooner or later, including even the matter of consciousness. To be sure, there may well be questions we can't think up ever, and therefore limits to the reach of human intellect, but that is another matter. Within our limits, we should be able to work our way through to all our answers, if we keep at it long enough, and pay attention.

单选题According to the passage, all of the following will result from human competition EXCEPT ______.

单选题War is the social cancer of mankind. It is a pernicious form of ignorance, for it destroys not only its "enemies", but also the whole superstructure of what it is a part—and thus eventually it defeats itself.

单选题The author believes ______.

单选题 Attacking an increasingly popular Internet business practice, a consumer watchdog group Monday filed a complaint with the Federal Trade Commission, asserting that many online search engines are concealing the impact special fees have on search results by Internet users. Commercial Alert, a 3-year-old group founded by consumer activist Ralph Na-der, asked the FTC to investigate whether eight of the Web's largest search engines are violating federal laws against deceptive advertising. The group said that the search engines are abandoning objective formulas to determine the order of their listed results and selling the top spots to the highest bidders without making adequate disclosures to Web surfers. The complaint touches a hot-button issue affecting tens of millions of people who submit search queries each day. With more than 2billion pages and more than 14 billion hyperlinks on the Web, search requests rank as the second most popular online activity after E-mail. The eight search engines named in Commercial Alert's complaint are: MSN, owned by Microsoft; Netscape, owned by AOL Time Warner; Directhit, owned by Ask Jeeves;HotBot and Lycos, both owned by Term Lycos; AltaVista, owned by CMGI; LookSmart,owned by KookSmart; and iWon, owned by a privately held company operating under the same name. Portland, Ore-based Commercial Alert could have named more search engines in its complaint, but focused on the biggest sites that are auctioning off spots in their results,said Gary Ruskin, the group's executive director. "Search engines have become central in the quest for learning and knowledge in our society. The ability to skew (扭曲) the results in favor of hucksters (小贩) without telling consumers is a serious problem. " Ruskin said. By late Monday afternoon, three of the search engines had responded to The Associated Press' inquiries about the complaint.Two, LookSmart and AltaVista, denied the charges. Microsoft spokesman Matt Pilla said MSN is delivering "compelling search results that people want". The FTC had no comment about the complaint Monday. The complaint takes aim at the new business plans embraced by more search engines as they try to cash in on their pivotal (关键) role as Web guides and reverses a steady stream of losses. To boost revenue,search engines in the past year have been accepting payments from businesses interested in receiving a higher ranking in certain categories or ensuring that their sites are reviewed more frequently.

单选题Modern American music is rich in its variety of forms, styles, and instruments. A complete encyclopedia (百科全书) of American music is a small library! By just looking at a few types of American music, we can see much diversity. Blues music, which goes back to the 1860s, has African American roots. Blues singers often sing of sad themes: feelings of loneliness or hunger, or being far away from home. The banjo and the washboard were common instruments in early blues music. The harmonica, guitar, and piano are some of the many other instruments used in blues. Jazz has its beginnings in the 1890s in New Orleans. The musical contributions of people from many parts of the world came together in this port on the Mississippi River to create the early versions of jazz. Now jazz comes in many forms and is popular in the United States and many other countries. The fiddle is a common instrument in early country music, but today we hear many kinds of instruments in country music, especially the guitar. Cowboy movies in the 1930s and 1940s helped to make country music very popular. Rap music has its origins in New York in the early 1970s. Rap uses a lot of rhyming. Rhymes are words that sound the same. Many young people like the beat in rap music. Like all music, modern American music causes people to sing, dance, smile, and cry. American music is sometimes controversial (有争议的), but it shows us the diversity of American culture.

单选题Ideas about education are changing in the United States. Education today is not just a high school diploma or a college degree. Many adults are not interested in going to college. They are interested in other kinds of learning. For them, learning does not end with a diploma． Continuing education gives these adults the opportunity to increase their knowledge about their own field or to learn about a new field．It also gives them a chance to improve their old skills or to learn new ones. Scientists, mechanics and barbers can take classes to improve their work skills. If they know more or learn more, they can get a better job or earn more money. Continuing education classes give more adults the chances to learn new skills. There is usually a large variety of classes to choose from: typing, foreign cooking, photography, auto repair, furniture repair, or swimming. These are only some of the classes available. Some adults take classes for fun or because the class will be useful for them. Other adults take continuing education classes to improve their own lives because they want to feel better about themselves. Almost any community college or public school system has a continuing education program. There are classes in schools, community buildings or churches. Most classes are in the evening, so working people can attend．The classes are usually small, and they are inexpensive.

单选题You ask how to start a business? Here is an example. David Dawson, a serious mountain climber, was dissatisfied with soft iron pitons (锥锤), the only ones he was able to buy. They lasted just one or two climbs, and Dawson wanted to replace them with "chrome-molys" (铬率合金), which were harder, stronger and longer-lasting. Some climbers made them for limited distribution among friends, but they were not commercially available. So Dawson started Dawson Equipment Ltd. , a purveyor (承办商) of climbing equipment, as a one-man enterprise in Burbank, California, in 1958. He had no plan, no management experience and no advertising. He worked in a shed using a hand forge purchased with $ 800 of capital borrowed from his mother. What Dawson did have was a knowledge of the kind of equipment that he needed in his own climbs, and a sense that serious climbers would follow his lead. Currently Dawson Equipment is thriving and produces over 200 products. Business opportunities are mere than ample today for the simple reason that many consumers are dissatisfied. Dawson's business started from his being a customer not liking what he bought. I suspect that your business will begin that way too. You know what you want to replace, improve or change. So begin where the tool breaks, the service slips or the shoe pinches.

单选题You claim that ______ travelling by boat I am wasting part of my holiday: on the contrary, I regard the sea journey as the most enjoyable part of it.

单选题The most surprising aspect of the modern man's good conscience is that he asserts and justifies it in terms of the most varied and even contradictory metaphysical theories and social philosophies. The idealist Hegel and the materialist Marx agree in their fundamental confidence in human virtue, disagreeing only in their conception of the period and the social circumstances in which and the method by which his essential goodness is, or is to be, realized. The romantic naturalist Rousseau agrees with the rationalistic naturalists of the French Enlightenment, though in the one case the seat of virtue is found in natural impulse unspoiled by rational disciplines and in the other case it is reason which guarantees virtue. Among the rationalistic naturalists again there is agreement upon this point whether they are hedonistic or Stoic in their conceptions and whether they believe that reason discovers and leads to a natural harmony of egoistic impulses or that it discovers and affirms a natural harmony of social impulses. The whole Christian drama of salvation is rejected ostensibly because of the incredible character of the myths of Creation, Fall, Atonement, etc., in which it is expressed. But the typical modern is actually more certain of the complete irrelevance of these doctrines than of their incredibility. He is naturally not inclined to take dubious religious myths seriously, since he finds no relation between the ethos which informs them and his own sense of security and complacency. The sense of guilt expressed in them is to him a mere vestigial remnant of primitive fears of higher powers, of which he is happily emancipated. The sense of sin is, in the phrase of a particularly vapid modern social scientist, "a psychopathic aspect of adolescent mentality". The universality of this easy conscience among moderns is the more surprising since it continues to express itself almost as unqualifiedly in a period of social decay as in the eighteenth- and nineteenth-century heyday of a bourgeois culture. The modern man is involved in social chaos and political anarchy. The Marxist escape from this chaos has developed in Russia into a regime of unparalleled proportions. Contemporary history is filled with manifestations of man's hysteria and furies; with evidences of his demonic capacity and inclination to break the harmonies of nature and defy the prudent canons of rational restraint. Yet no cumulation of contradictory evidence seems to disturb modern man's good opinion of himself. He considers himself the victim of corrupting institutions which he is about to destroy or reconstruct, or of the confusions of ignorance which an adequate education is about to overcome. Yet he continues to regard himself as essentially harmless and virtuous. The question therefore arises how modern man arrived at, and by what means he maintains, an estimate of his virtue in such pathetic contradiction with the obvious facts of his history.

单选题The ink had faded with time and so parts of the letter were {{U}}illegible{{/U}}.

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单选题You ______ the experiment twice, not once. A. should have carried out B. shouldn't have carried out C. haven't carried out D. couldn't have carried out