单选题{{B}}Passage 2{{/B}} Between 1833 and 1837, the publishers of a "penny press" proved that a low-priced paper, edited to interest ordinary people, could win what amounted to a mass circulation for the times and thereby attract an advertising volume that would make it independent. These were papers for the common citizen and were not tied to the interests of the business community, like the mercantile press, or dependent for financial support upon political party allegiance. It did not necessarily follow that all the penny papers would be superior in their handling of the news and opinion functions. But the door was open for some to make important journalistic advances. The first offerings of a penny paper tended to 'be highly sensational; human interest stories overshadowed important news, and crime and sex stories were written in full detail. But as the penny paper attracted readers from various social and economic brackets, its sensationalism was modified. The ordinary reader came to want a better product, too. popularized style of writing and presentation of news remained, but the penny paper became a respectable publication that offered significant information and editorial leadership. Once the first of the successful penny papers had shown the way, later ventures could enter the competition at the higher level of journalistic responsibility the pioneering paper, had reached. This was the pattern of American newspapers in the years following the founding of the New York Sun in 1833. The Sun, published by Benjamin Day, entered the lists against 11 other dailies. It was tiny in comparison; but it was bright and readable, and it preferred human interest features to important but dull political speech reports. It had a police reporter writing squibs of crime news in the style already proved successful by some other papers. And, most important, it sold for a penny, whereas its competitors sold for sir cents. By 1837 the Sun was printing 30,000 copies a day, which was more than the total of all 11 New York daily newspapers combined when the Sun first appeared. In those same four years James Gordon Bennett brought out his New York Herald (1835), and a trio of New York printers who were imitating Day's success founded the Philadelphia Public Ledger (1836) and the Baltimore Sun (1837). The four penny sheets all became famed newspapers.

单选题 BQuestions 24—26 are based on the radio program. You now have 15 seconds to read Questions 24—26./B

单选题{{B}}Passage 2{{/B}} One of the many theories about alcoholism is the learning and reinforcement theory, which explains alcoholism by considering alcohol ingestion as a reflex response to some stimulus and as a way to reduce an inner drive state such as fear or anxiety. Characterizing life situations in terms of approach and avoidance, this theory holds that persons tend to be drawn to pleasant situations or repelled by unpleasant ones. In the latter case, alcohol ingestion is said to reduce the tension or feelings of unpleasantness and to replace them with the feeling of euphoria generally observed in most persons after they have consumed one or more drinks. Some experimental evidence tends to show that alcohol reduces fear in an approach-avoidance situation. Conger trained one group of rats to approach a food goal and, using aversive conditioning, trained another group to avoid electric shock. After an injection of alcohol the pull away from the shock was measurably weaker, while the pull toward the food was unchanged. The obvious troubles experienced by alcoholic persons appear to contradict the learning theory in the explanation of alcoholism. The discomfort, pain, and punishment they experience should presumably serve as a deterrent to drinking. The fact that alcoholic persons continue to drink in the face of family discord, loss of employment, illness, and other sequels of repeated bouts is explained by the proximity of the drive reduction to the consumption of alcohol; that is, alcohol has the immediate effect of reducing tension while the unpleasant consequences of drunken behavior come only later. The learning paradigm, therefore, favors the establishment and repetition of the resort to alcohol. In fact, the anxieties and feelings of guilt induced by the consequences of excessive alcohol ingestion may themselves become the signal for another bout of alcohol abuse. The way in which the clue for another bout could be the anxiety itself is explained by the process of stimulus generalization, conditions Or events occurring at the time of reinforcement tend to acquire the characteristics of stimuli. When alcohol is consumed in association with a state of anxiety or fear, the emotional state itself takes on the properties of a stimulus, thus triggering another drinking bout. The role of punishment is becoming increasingly important in formulating a cause of alcoholism based on the principles of learning theory. While punishment may serve to suppress a response, experiments have shown that in some cases it can serve as a reward and reinforce the behavior. Thus if the alcoholic person has learned to drink under conditions of both reward and punishment, either type of condition may precipitate renewed drinking. Ample experimental evidence supports the hypothesis that excessive alcohol consumption can be learned. By gradually increasing the concentration of alcohol in drinking water, psychologists have been able to induce the ingestion of larger amounts of alcohol by an animal than would be normally consumed. Other researchers have been able to achieve similar results by varying the schedule of reinforcement; that is, by requiring the animal to consume larger and larger amounts of the alcohol solutions before rewarding it. In this manner, animals learn to drink enough to become dependent on alcohol in terms of demonstrating withdrawal symptoms.

单选题This year's sterling Udepreciation/U, only a few aver, has no impact on the economy at large.

单选题The site of the battle brought back to him memories of the ______ years of the World War Two.(2010年北京航空航天大学考博试题)

单选题Will the pressure applied by environmentalists be enough to ______ the industrialized nations into using less fossil fuels? A. goad B. gloat C. gore D. gibe

单选题The word "awesome" in the passage means

单选题Fingerprints form an unchangeable mark______despite changes in the individual's appearance or age.

单选题They are still in the______stage between the old and new government.

单选题In his book on biotechnology, Rifkin ______ that "for now, the most important issue at hand is to make the new science and technology an issue of considerable public attention."(2011年华东师范大学试题)

单选题By the time new doctors get a job and try to finish their theses in spare time ______.

单选题It has been argued that where schools become bureaucratized, they become bound up with the techniques and implementation of the managerial process, and may concentrate on concern with position and self-advancement. In so doing, they may neglect the purpose for which they were set up. Thus, they do not facilitate the development of those who are part of the school community, and tend to neglect the desires of children, parents and society at large. It is because of such criticisms that there has been an increasing influence in political rhetoric and legislation of free-market theories of organization and society. Such theories suggest that a much more market-oriented, competitive approach is required so that schools reorient themselves towards their "clients". By so doing, it is claimed, not only do they once again address the needs of those with whom they should be primarily concerned, but such an approach also unleashes the benefits of individual responsibility, freedom of choice, and reward. Though much of this sounds attractive, it has its roots as much in an economic body of thought as in social and political theory, and this must raise the question of whether it can be viably transferred to an educational context. Indeed, if by "educational" we mean the development of all within the school community, then free-market theory may miss the mark by concentrating on only one section, "the consumers". If teachers are seen as part of this community, then their development is just as important. If bureaucratic forms of management face the problem of explaining how their values can be objective when they are in fact the product of a particular value orientation, the forms of management derived from free-market theories, suggesting an openness to the adoption of different sets of values, are subject to the charge of relativism. In other words, free-market theories, granted that they are arguing that individuals should be allowed to pursue their own ends, must explain why any set of values, including their own, is preferable to another.

单选题The policeman stands at the crossroads to regulate the______.

单选题An education should enable a student to get a better job than he would ______ be able to find or fill.

单选题Future agriculture should depend on high technology______traditional methods. (中国矿业大学2010年试题)

单选题The need for solar electricity is clear. It is safe, ecologically sound, efficient, continuously available, and is has no moving parts. The basic problem with the use of solar photovoltaic devices is economics, but until recently very little progress has been made toward the development of low-cost photovoltaic devices. The larger part of research funding has been devoted to study of single-crystal silicon solar cells, despite the evidence, including that of the leading manufacturers of crystalline silicon, that the technique holds little promise. The reason for this pattern is understandable and historical. Crystalline silicon is the active element in the Very successful semiconductor industry, and virtually all of the solid state devices contain silicon transistors and diodes. Crystalline silicon, however, is particularly unsuitable to terrestrial solar cells. Crystalline silicon solar cells work well and are successfully used in the space program, where cost is not an issue. While single-crystal silicon has been proven in extraterrestrial use with efficiencies as high as 18 percent, and other more expensive and scarce materials such as gallium arsenide can have even higher efficiencies, costs must be reduced by a factor of more than 100 to make them practical for commercial use. Beside the fact that the starting crystalline silicon is expensive, 95 percent of it is wasted and does not appear in the final device. Recently, there have been some imaginative attempts to make polycrystalline and ribbon silicon, which are lower in cost than high-quality single crystals. But to date the efficiencies of these apparently lower-cost arrays have been unacceptably small. Moreover, these materials are cheaper only because of the introduction of disordering in crystalline semiconductors, and disorder degrades the efficiency of crystalline solar cells. This dilemma can be avoided by preparing completely disordered or amorphous materials. Amorphous materials have disordered atomic structure as compared to crystalline materials. That is, they have only short-range order rather than the long-range periodicity of crystals. The advantages of amorphous solar cells are impressive. Whereas crystals can be grown as wafers about four inches in diameter, amorphous materials can be grown over large areas in a single process. Whereas crystalline silicon must be made 200 microns thick to absorb a sufficient, amount of sunlight for efficient energy conversion, only 1 micron of the proper amorphous materials is necessary. Crystalline silicon solar cells cost in excess of $100 per square foot, but amorphous films can be created at a cost of about 50 per square foot. Although many scientists were aware of the very low cost of amorphous solar cells, they felt that they could never be manufactured with the efficiencies necessary to contribute significantly to the demand for electric power. This was based on a misconception about the feature which determines efficiency. For example, it is not the conductivity of the material in the dark which is relevant, but only the photoconductivity, that is the conductivity in the presence of sunlight. Already, solar cells with efficiencies well above 6 percent have been developed using amorphous materials, and further research will doubtless find even less costly amorphous materials with higher efficiencies.

单选题So far as the food industry is concerned, the processing of sheep and lambs is relatively ______ in the United States, accounting for only about 7 percent of meat-packing production. A. irrelevant B. appropriate C. negligible D. redundant