单选题When solid changes to liquid, it ______ heat from all substances near it and this reduces the temperature surrounding it.

单选题Everyone asked me where he was, but it was ______ a mystery to me as to them.

单选题Another trend of the 1990s in the computer industry is toward multimedia formats, as the market for conventional types of computer--those that have computation and data processing as their major functions--has begun to become saturated. Multimedia computers are systems that can process graphics, sound, video, and animation in addition to traditional data processing. Videocassette recorders, televisions, telephones, and audiocassette players have recently undergone a change in technology from analog to digital formats. Television images, for example, can be processed by computer programs once they have been converted to digital signals, while those in conventional analog signals cannot. In other words, digital video images can be zoomed up or down, reshaped, or rearranged by the appropriate software. Also, due to advances in video-signal compression technology, the memory space required for storing a video program has been greatly reduced. Multimedia has important applications for consumer products and for business needs. Video scenes that are captured by camcorders can be combined with text, sound, and data and can be viewed on television sets in homes, schools, or offices. These multimedia presentations are becoming useful educational and commercial tools. For example, there are available encyclopaedias that contain video programs depicting animal behavior, geomorphic processing, and other natural phenomena. Automobile mechanics can watch videos that demonstrate how to repair new models. In business applications, documents can be annotated with 7oice or video. New consumer products can be more effectively marketed by demonstrating how they can be used. CD-ROMs of numerous other subjects have been recently published; all of them can be viewed on TV monitors using multimedia computers. These multimedia computer systems can, in turn, be incorporated into computer networks, enhancing the effectiveness of communication. This multitude of new products and capabilities has been made possible by the tremendous progress of microprocessor technology. Because of the advances in this area, personal computers have become more powerful, smaller, and less expensive, which has enabled computer networks to proliferate. Many of the tasks that were traditionally performed by mainframes have been transferred to personal computers connected to communications networks. Although the mainframe continues to be produced and serves a useful purpose, it has been used more often as one of many different computers and peripheral devices connected to computer networks. In this new role, the function of mainframes as powerful processors of database systems is becoming important, and, as a result, massively parallel computers with hundreds or thousands of microprocessors are being produced. In addition to being powerful, the microprocessors used for this purpose must be inexpensive, but low costs can be achieved only if they are mass-produced. Throughout the world, more than 100, 000, 000 personal computers and 500, 000 workstations are in use, whereas only several hundred supercomputers are in operation; the numbers of mainframes and minicomputers fall somewhere between those of supercomputers and workstations. Because of such high-volume production, microprocessors for personal computers or workstations tend to be inexpensive and are available for use in massively parallel computers as well.

单选题 To understand the marketing concept, it is only necessary to understand the difference between marketing and selling. Not too many years ago, most industries concentrated primarily on the efficient production of goods, and then relied on "Persuasive salesmanship" to move as much el these goods as possible. Such production and selling focuses on the needs of the seller to produce goods and then convert them into money. Marketing, on the other hand, focuses on the wants of consumers, It begins with first analyzing the preferences and demands of consumers and then producing goods that will satisfy them. This eye-on-the consumer approach is known as the marketing concept, which simply means that instead of trying to sell whatever is easiest to produce or buy for resale, the makers and dealers first try to find out what the consumer wants to buy and then go about making it according to consumer demand. This concept does not imply that consumer satisfaction is given priority over profit in a company. There are always two sides to every business activity—the firm and the customer, each must be satisfied before trade occurs. Successful merchants and producer and each must be satisfied before trade occurs. Successful merchants and producers, however, recognize that the surest route to profit is through understanding customers, this concept has been recognized in such slogans as "Have It Your Way." And "You're the Boss." A good example of the importance of satisfying the consumer presented itself in mid 1985, when Coca Cola changed the flavor of its drink. The non-acceptance of the new flavor by a significant portion of the public brought about a prompt restoration of the Classic Coke, which was then marketed alongside the new. King Customer ruled!

单选题A quality education is the ultimate liberator. It can free people from poverty, giving them the power to greatly improve their lives and take a productive place in society. It can also free communities and countries, allowing them to leap forward into periods of wealth and social unity that otherwise would not be possible. For this reason, the international community has committed itself to getting all the world"s children into primary school by 2,015, a commitment known as Education for All. Can education for all be achieved by 2,015? The answer is definitely "yes", although it is a difficult task. If we now measure the goal in terms of children successfully completing a minimum of five years of primary school, instead of just enrolling for classes, which used to be the measuring stick for education, then the challenge becomes even more difficult. Only 32 countries were formerly believed to be at risk of not achieving education for all on the basis of enrollment rates. The number rises to 88 if completion rates are used as the criterion. Still, the goal is achievable with the right policies and the right support from the international community. 59 of the 88 countries at risk can reach universal primary completion by 2,015 if they bring the efficiency and quality of their education systems into line with standards observed in higher-performing systems. They also need significant increases in external financing and technical support. The 29 countries lagging farthest behind will not reach the goal without unprecedented rates of progress. But this is attainable with creative solutions, including use of information technologies, flexible and targeted foreign aid, and fewer people living in poverty. A key lesson of experience about what makes development effective is that a country"s capacity to use aid well depends heavily on its policies, institutions and management. Where a country scores well on these criteria, foreign assistance can be highly effective.

单选题Two {{U}}substitutes{{/U}} were used during the basketball games.

单选题The secretary didn't know who he was, or she ______ him more politely.

单选题{{B}}Directions:{{/B}} Read each passage and answer all the questions that follow the passage. On your answer sheet, circle the letter that best answers the question.{{B}}Passage One{{/B}} There is little question that substantial labor-market differences exist between men and women. Among the most researched difference is the male-female wage gap. Many different theories aroused to explain why men earn more than women. One possible reason is based on the limited geographical mobility of married women [Robert Frank, 1978]. Family mobility is a joint decision in which the needs of the husband and wife are balanced to maximize family welfare. Job-motivated relocations are generally made to benefit the primary earner in the family. This leads to a constrained job search for the secondary earner, as he or she must search for a job in a limited geographic area. Since the husband is still the primary wage earner in many families, the job search of the wife may suffer. Individuals who are tied to a certain area are labeled "tied-stayers," while secondary earners, who move for the benefit of the family are labeled "tied-movers" [Jacob ～Mincer, 1978]. The wages of a tied-stayer or tied-mover may not be substantially lower if the family lives in or moves to a large city. If a large labor market has more vacancies, the wife may locate a wage offer near the maximum she would find with a nation-wide search. However, being a tied- stayer or tied-mover can lower the wife's wage if the family lives in or moves to a small community. A small labor market will reduce the likelihood of her finding a job that utilizes her skills, As a result she may accept a job for which she is overqualified and thus earn a lower wage. This hypothesized relationship between the likelihood "of being overqualified" and SMSA size is termed "differential overqualification." Frank 1978 and Haim Ofek and Yesook Merrill [1994] provide support for the theory of differential overqualification by finding that the male-female wage gap is grater in smaller SMSA's. While the results are consistent with the existence of differential overqualification, they may also result from other situations as well. Firms in small labor markets may use their monopsony power to keep wages down. Local demand shocks are found to be a major source of wage variation both across and within local labor markets [ Robert Topel, 1986]. Since large labor markets are generally more diversified, a demand shock can have a substantial impact on immobile workers in small labor markets. Another reason for examining differential overqualification involves the assumption that there are more vacancies in large labor markets. While there is little doubt that more vacancies exist in large labor markets, there are also likely to be more people searching for jobs in large labor markets, if the greater number of vacancies is offset by the larger number of searchers, it is unclear whether women will be more likely to be overqualified in small labor markets. Instead of relying on wages to determine if differential overqualifieation exists, we consider an explicit form of overqualifieation based on education.

单选题She claims to be very learned in biochemistry, but in fact ______ she knows about it is all sadly out of date.

单选题 New technology links the world as never before. Our planet has shrunk. It's new a "global village" where countries are only seconds away by fax or phone or satellite link. And, of course, our ability to benefit from this high-tech communications equipment is greatly enhanced by foreign language skills. Deeply involved with this new technology is a breed of modem businesspeople who have a growing respect for the economic value of doing business abroad. In modem markets, success overseas often helps support domestic business efforts. Overseas assignments are becoming increasingly important to advancement within executive ranks. The executive stationed in another country no longer need fear being "out of sight and out of mind". He or she can be sure that the overseas effort is central to the company's plan for success, and that promotions often follow or accompany an assignment abroad, if an employee can succeed in a difficult assignment overseas, superiors will have greater confidence in his or her ability to cope back in the United States where cross-cultural considerations and foreign language issues are becoming more and prevalent(普遍的). Thanks to a variety of relatively inexpensive communications devices with business applications, even small businesses in the United States are able to get into international markets. English is still the international language of business. But there is an ever-growing need for people who can speak another language. A second language isn't generally required to get a job in business, but having language skills gives a candidate the edge when other qualifications appear to be equal. The employee posted abroad who speaks the country's principal language has an opportunity to fast-forward certain negotiations, and can have the cultural insight to know when it is better to move more slowly. The employee at the home office who can communicate well with foreign clients over the telephone or by fax machine is an obvious asset to the firm.

单选题Samuel was obliged to compromise on lesser questions.

单选题Lowbrows are quite ______ for highbrows to have their symphonies and their Russian novels. A. content B. contained C. capacity D. yearning

单选题Over the past century, all kinds of unfairness and discrimination have been condemned or made illegal. But one insidious form continues to thrive: alphabetism. This, for those as yet unaware of such a disadvantage, refers to discrimination against those whose surnames begin with a letter in the lower half of the alphabet. It has long been known that a taxi firm called AAAA cars has a big advantage over Zodiac cars when customers thumb through their phone directories. Less well known is the advantage that Adam Abbott has in life over Zoe Zysman. English names are fairly evenly spread between the halves of the alphabet. Yet a suspiciously large number of top people have surnames beginning with letters between A and K. Thus the American president and vice-president have surnames starting with B and C respectively; and 26 of George Bush's predecessors (including his father) had surnames in the first half of the alphabet against just 16 in the second half. Even more striking, six of the seven heads of government of the G7 rich countries are alphabetically advantaged (Berlusconi, Blair, Bush, Chirac, Chretien and Koizumi). The world's three top central bankers (Greenspan, Duisenberg and Hayami) are all close to the top of the alphabet, even if one of them really uses Japanese characters. As are the world's five richest men (Gates, Buffet, Allen, Ellison and Albrecht). Can this merely be coincidence? One theory, dreamt up in all the spare time enjoyed by the alphabetically disadvantaged, is that the rot sets in early. At the start of the first year in infant school, teachers seat pupils alphabetically from the front, to make it easier to remember their names. So short-sighted Zysman junior gets stuck in the back vow, and is rarely asked the improving questions posed by those insensitive teachers. At the time the alphabetically disadvantaged may think they have had a lucky escape. Yet the result may be worse qualifications, because they get less individual attention, as well as less confidence in speaking publicly. The humiliation continues. At university graduation ceremonies, the ABCs proudly get their awards first; by the time they reach the Zysmans most people are literally having a ZZZ. Shortlists for job interviews, election ballot papers, lists of conference speakers and attendees: all tend to be drawn up alphabetically, and their recipients lose interest as they plough through them.

单选题Mr. Murray remains a devout supporter of the new theory. A. an ardent B. a leading C. an influential D. a coal

单选题A leading British scholar has proposed translating Shakes peare into contemporary English ______young audience who are confused by jokes which are 400 years out of date.

单选题They had to examine the dead fish before they had a ______ answer as to what killed them.

单选题Picking flowers in the park is absolutely ______. A. avoided B. prohibited C. rejected D. repelled

单选题The captain was ______ to sergeant for failing to fulfill his duties.

单选题She is a woman of ______ who has never abandoned her principles for the sake of her own benefits. A. dignity B. scarcity C. Integrity D. stability