单选题Everyone is trying to _______ how the fire started.

单选题[此试题无题干]

单选题Some people can be addicted ______ mahjong.

单选题Some would consider such speech an infringement of good mariners whereas others would not. A. an example B. a violation C. an insult D. an indication

单选题 At the heart of the debate over illegal immigration lies one key question: are immigrants good or bad for the economy? The American public overwhelmingly thinks they're bad. Yet the consensus among most economists is that immigration, both legal and illegal, provides a small net boost to the economy. Immigrants provide cheap labor, lower the prices of everything from farm produce to new homes, and leave consumers with a little more money in their pockets. So why is there such a discrepancy between the perception of immigrants' impact on the economy and the reality? There are a number of familiar theories. Some argue that people are anxious and feel threatened by an inflow of new workers. Others highlight the strain that undocumented immigrants place on public services, like schools, hospitals, and jails. Still others emphasize the role of race, arguing that foreigners add to the nation's fears and insecurities. There's some truth to all these explanations, but they aren't quite sufficient. To get a better understanding of what's going on, consider the way immigration's impact is felt. Though its overall effect may be positive, its costs and benefits are distributed unevenly. David Card, an economist at UC Berkeley, notes that the ones who profit most directly from immigrants' low-cost labor are businesses and employers—meatpacking plants in Nebraska, for instance, or agricultural businesses in California. Granted, these producers' savings probably translate into lower prices at the grocery store, but how many consumers make that mental connection at the checkout counter? As for the drawbacks of illegal immigration, these, too, are concentrated. Native low-skilled workers suffer most from the competition of foreign labor. According to a study by George Borjas, a Harvard economist, immigration reduced the wages of American high-school dropouts by 9%between 1980-2000. Among high-skilled, better-educated employees, however, opposition was strongest in states with both high numbers of immigrants and relatively generous social services. What worried them most, in other words, was the fiscal (财政的) burden of immigration. That conclusion was reinforced by another finding: that their opposition appeared to soften when that fiscal burden decreased, as occurred with welfare reform in the 1990s, which curbed immigrants' access to certain benefits. The irony is that for all the overexcited debate, the net effect of immigration is minimal. Even for those most acutely affected—say, low-skilled workers, or California residents—the impact isn't all that dramatic. 'The unpleasant voices have tended to dominate our perceptions, ' says Daniel Tichenor, a political science professor at the University of Oregon, 'But when all those factors are put together and the economists calculate the numbers, it ends up being a net positive, but a small one. ' Too bad most people don't realize it.

单选题 甲骨文 甲骨文(oracle bone script)指中国商代和西周早期刻在龟甲或兽骨上的文字，用于占卜(divine)或记事。它是中国最早的文字体系，是汉语发展的关键阶段，现代汉字就是由甲骨文演变而来。人们通常认为甲骨文是王懿荣于1899年从来自河南安阳的甲骨上发现的。截至2012年，被人们发现的甲骨大约有15万片，刻有4500多个单字。这些甲骨所记载的内容极为丰富，涉及商代社会生活的诸多方面，包括政治、军事、文化、社会习俗、天文、历法、医药等。

单选题The destruction 'an earthquake causes depends on its ________ and duration, or the amount of shaking that occurs.

单选题(In) his (latest) article Tom criticizes the way (which) the war (is being handled).

单选题Mary ______ when she found her husband drunk again.

单选题______ in all parts of the state, pines are the most common trees in Georgia.

单选题As a______for his contribution, he got a new car from the company.

单选题Please do not be ______ by his manners since he is merely trying to attract attention.

单选题 TV Programmes Channel(频道) Channel 2 18:00 Around China 17:35 Computers Today 18:40 Children's programme 18:05 Foreign Arts 19:00 News 18:30 English Classroom 19:35 Weather Report 19:10 Animal World 19:40 Around the World 19:35 China '06 20:05 TV play: Sisters 20:20 Sports 21:00 English for Today 21:00 TV play: Guo Lanying 21:20 Classical Music 21:50 English News 21:55 Talk Show 22:10 On TV Next Week

单选题 Specialization can be seen as a response to the problem of an increasing accumulation of scientific knowledge. By splitting up the subject matter into smaller units, one man could continue to handle the information and use it as the basis for further research. But specialization was only one of a series of related developments in science affecting the process of communication. Another was the growing professionalization of scientific activity. No clear-cut distinction can be drawn between professionals and amateurs in science: exceptions can be found to any rule. Nevertheless, the word 'amateur' does carry a connotation that the person concerned is not fully integrated into the scientific community and, in particular, may not fully share its values. The growth of specialization in the nineteenth century, with its consequent requirement of a longer, more complex training, implied greater problems for amateur participation in science. The trend was naturally most obvious in those areas of science based especially on a mathematical or laboratory training, and can be illustrated in terms of the development of geology in the United Kingdom. A comparison of British geological publications over the last century and a half reveals not simply an increasing emphasis on the primacy of research, but also a changing definition of what constitutes an acceptable research paper. Thus, in the nineteenth century, local geological studies represented worthwhile research in their own right; but, in the twentieth century, local studies have increasingly become acceptable to professionals only if they incorporate, and reflect on, the wider geological picture. Amateurs, on the other hand, have continued to pursue local studies in the old way. The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of refereeing, first by national journals in the nineteenth century and then by several local geological journals in the twentieth century. As a logical consequence of this development, separate journals have now appeared aimed mainly towards either professional or amateur readership. A rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or to come together nationally in a different way. Although the process of professionalization and specialization was already well under way in British geology during the nineteenth century, its full consequences were thus delayed until the twentieth century. In science generally, however, the nineteenth century must be reckoned as the crucial period for this change in the structure of science.

单选题The italicized word "telesurgery" (Par. 1, sentence 2) can be best explained as ______.

单选题Sometimes I scratch my head when I read about the government s efforts to improve schools:new standards and tests to be applied, strict teacher evaluations, and threats of school closures and job

单选题Sorry, I can't repay you this week. I'm completely______.