单选题If you're a regular reader of blogs.or indeed of any kind of news website, you've probably been frustrated from time to time by information overload: the blogosphere creates______material for any human being to comfortably______.

单选题Seventeen-year-old Quantae Williams doesn't understand why the U. S. Supreme Court struck down his school district's racial diversity program. He now (61) the prospect of leaving his mixed-race high school in suburban Louisville and (62) to the poor black downtown schools where he (63) in fights. "I'm doing (64) in town. They should just leave it the (65) it is," said Williams, using a fond nickname for suburban Jeffersontown High School, (66) he's bused every day from his downtown neighborhood. "Everything is (67) , we get along well. If I go where all my friends go, I'll start getting in trouble again," Williams said as he took a (68) from his summer job (69) clothing (70) for poor families. Last month's 5-4 ruling by the Supreme Court struck down programs that were started voluntarily in Louisville and Seattle. The court's decision has left schools (71) the country (72) to find a way to protect (73) in their classrooms. Critics have called the decision the biggest (74) to the ideals of the 1954 Brown vs. Board of Education (75) , which outlawed racial segregation in U. S. public schools. With students already (76) to schools for the (77) year that begins in September, (78) will be immediately affected by the Supreme Court decision. In Jefferson County, officials said it could be two years (79) a new plan is (80) place, leaving most students in their current schools.

单选题In most corners of the world malnutrition is plainly a matter of outright insufficiency of food for the population--where the majority of the people do not obtain enough food calories to meet minimal needs for support of physical work and for maintenance of health. Elsewhere the problem may be not one of insufficient, calories but of lack of specific nutrients essential for health. In Latin America, as in other places, the dread protein deficiency disease kwashiorkor is taking its heavy toll of children's lives. Strategic vitamins and minerals may be lacking due to traditional diets which are nutritionally imbalanced. Here people continue their eating pattern year after year without knowledge of that their dietary habits are doing to themselves and to future generations. With a basic knowledge of nutritional needs and deficiencies, efforts could be directed to finding food substitutes which could meet these needs. Mixtures of vegetable proteins, like soybeans and peanuts, could provide an abundance of cheap, useful protein where meat, eggs, and milk are not within economic reach of large groups in the population. Efforts could also be expended on increasing the agricultural productivity in specific regions; where large areas are given over to relatively inefficient use as grazing land, the intensive production of vegetable protein crops could bring remedial nutrition to an undernourished population. Elsewhere, enrichment with specific vitamins and minerals of traditional staple foods that are deficient in essential nutritive factors could wipe out disabling deficiency diseases, like beriberi or pellagra, almost overnight. Similarly, addition of minute amounts of inexpensive iodine to salt could benefit large areas where endemic goiter has been accepted as an integral part of life for generations.

单选题It is difficult to ______ this goal if you work hard continuously.

单选题It is impossible to ______ the story of the First World War into a few pages.

单选题AIDs activists permanently changed and shortened America' s ______ process fortes ting and approving new drugs of all kinds, for all diseases.

单选题Some companies have introduced flexible working time with less emphasis on pressure______.

单选题Not knowing a foreign language is a(n)______to enjoying travel abroad.

单选题Detectives are rather cynical because ______.

单选题A 1994 World Bank report concluded that ______ girls in school was probably the single most effective anti-poverty policy in the developing world today.

单选题In order to get the business done, he tried to ______ his evil intentions with apparent friendliness.(2006年厦门大学考博试题)

单选题With its stock price rising by 20 percent, the company becomes the second most______.

单选题The National Safety Council urges drivers and passengers to wear seat belts as a ______ against injury.

单选题By such demarcation, strong, representative national societies can then be left to do what they do best -______ young scientists' development at national meetings, and represent their disciplines at the national level.

单选题The spontaneity of children's artwork sets it apart from the regulated uniformity ofmuch of what otherwise go on in traditional elementary classrooms.

单选题Well, no gain without pain, they say. But what about pain without gain? Everywhere you go in America, you hear tales of corporate revival. What is harder to establish is whether the productivity revolution that businessmen assume they are presiding over is for real. The official statistics are mildly discouraging. They show that, if you lump manufacturing and services together, productivity has grown on average by 1.2% since 1987. That is somewhat faster than the average during the previous decade. And since 1991, productivity has increased by about 2% a year, which is more than twice the 1978-1987 average. The trouble is that part of the recent acceleration is due to the usual rebound that occurs at this point in a business cycle, and so is not conclusive evidence of a revival in the underlying trend. There is, as Robert Rubin, the treasury secretary, says, a "disjunction" between the mass of business anecdote that points to a leap in productivity and the picture reflected by the statistics. Some of this can be easily explained. New ways of organizing the workplace all that reengineering and downsizing—are only one contribution to the overall productivity of an economy, which is driven by many other factors such as joint investment in equipment and machinery, new technology, and investment in education and training. Moreover, most of the changes that companies make are intended to keep them profitable, and this need not always mean increasing productivity: switching to new markets or improving quality can matter just as much. Two other explanations are more speculative. First, some of the business restructuring of recent years may have been ineptly done. Second, even if it was well done, it may have spread much less widely than people suppose. Leonard Schlesinger, a Harvard academic and former chief executive of Au Bong Pain, a rapidly growing chain of bakery cafes, says that much "reengineering" has been crude. In many cases, he believes, the loss of revenue has been greater than the reductions in cost. His colleague, Michael Beer, says that far too many companies have applied reengineering in a mechanistic fashion, chopping out costs without giving sufficient thought to long term profitability. BBDO"s A1 Rosenshine is blunter. He dismisses a lot of the work of reengineering consultants as mere rubbish—"the worst sort of ambulance cashing".

单选题I have felt for a long time that aid to underdeveloped countries should be placed in a definite and more rational order of priorities. Firstly, those underdeveloped nations who are short of food should be given what they need for attaining adequate nutritional standards. The rich countries should make up their mind that they do not want to make money out of selling food to starving peoples. In many countries, a major limitation of economic development is the valid fear that, when the unemployed and underemployed are set to work, they will consume more food than is available. It should be recognized that when, at the same time, other countries are laboring with the problems of food surpluses, this limitation of development is not only cruel but unnecessary and, indeed, absurd. There is, however, no reason why only those rich countries which have food surpluses should carry the burden of the costs of such aid. In any reasonable scheme of international cooperation, the costs for such a scheme should be shared by all the rich nations. What is more, aid should never be looked upon as a permanent solution to the problems of poverty. Aid should always be a help to self-help. For that reason a definite time limit should be set to the provision of food without pay, and a condition should be made that the aid-receiving country do everything it can to raise yields in agriculture. Otherwise there is always the danger that the food aid would only buttress its complacency. Secondly, therefore, the rich countries should also decide to give, free of charge, everything that it would be practical and economic to import from abroad in terms of tools and equipment, technical assistance, and training in order to assist underdeveloped countries to raise their agricultural production of food for consumption. Insofar as surpluses of fertilizers were available, those could be part of the aid. Otherwise, aid should instead be given to set up fertilizer factories in underdeveloped countries where conditions for fertilizer production are favorable. Thirdly, the rich countries should, in addition to meeting the fundamental request for more food to eat, agree to give everything that can be provided from abroad in the way of equipment, advice, personnel training, etc. , for the most rapid advance the underdeveloped countries can manage to engender in sanitation, health, education at all levels, and research, including surveys of their natural resources. If there are more funds available for aid to underdeveloped countries than are needed for these three forms, I would give the fourth priority to paying for equipment and other productive necessities from abroad, in order to speed up the formation of various types of overall capital such as irrigation and power facilities, ports, roads, store houses, etc. Such large-scale investment is necessary in order to give the basis for development, both in industry and agriculture. It is of a particular strategic importance in economic development, as it is labor-intensive and can thus make use of the productive resources of which an underdeveloped country has surplus, labor. If food ceased to be the cruel bottleneck as it is at present in many countries, and if undertaking these investments in overall capital would not compete for foreign exchange, underdeveloped countries would find it advantageous to give them a higher priority rating. A large part of the loans from the International Bank have this purpose, but it would be rational to use grant aid in order to make it possible for many underdeveloped countries to intensify their efforts in this direction.

单选题What is the purpose of examining a sample of a population?