单选题{{B}}Passage Two{{/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. A 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 papers 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 six cents. By 1837 the Sun was 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The government would not dare to impose taxes on such necessities as-bread or milk.

单选题In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion. A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected. Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said; " Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house. " Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hypothesis is a leap into the unknown. It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

单选题If any law and order ______ not maintained, neither the citizen nor his property is safe.

单选题How to evaluate the performance of students is still a problem that troubles many professors.(2004年电子科技大学考博试题)

单选题There was a quick turnover of staff in the department as the manager treated his employees with______contempt.(2005年中国科学院考博试题)

单选题She claims to be very learned in biochemistry, but in fact ______ she knows about it is all sadly out of date. A. so little B. that much C. what little D. how much

单选题The Untied States and Canada are lands of ______ except for the Indians, who are the only tree natives. A. emigrants B. immigrants C. dwellers D. inhabitants

单选题Many adults may think they are getting enough shut-eye, but in a major sleep study almost 80 percent of respondents admitted to not getting their prescribed amount of nightly rest. So, what exactly is the right amount of sleep? Research shows that adults need an average of seven to nine hours of sleep a night for optimal functionality. Read on to see just how much of an impact moderate sleep deprivation can have on your mind and body. By getting less than six hours of sleep a night, you could be putting yourself at risk of high blood pressure. When you sleep, your heart gets a break and is able to slow down for a significant period of time. But cutting back on sleep means your heart has to work overtime without its allotted break. In constantly doing so, your body must accommodate to its new conditions and elevate your overaI1 daily blood pressure. And the heart isn't the only organ that is overtaxed by a lack of sleeps. The less sleep you get, the less time the brain has to regulate stress hormones, and over time, sleep deprivation could permanently hinder the brain's ability to regulate these hormones, leading to elevated blood pressure. We all hang around in bed during our bouts of illness. But did you know that skipping out on the bed rest can increase your risk of getting sick? Prolonged sleep deprivation has long been associated with diminished immune functions, but researchers have also found a direct correlation between "modest" sleep deprivation—less than six hours—and reduced immune response. So try to toughen up your immune system by getting at least seven hours of sleep a night, and maintaining a healthy diet. You'll be glad you got that extra hour of sleep the next time that bug comes around and leaves everyone else bedridden with a fever for three days. During deep REM sleep, your muscles (except those in the eyes) are essentially immobilized in order to keep you from acting out on your dreams. Unfortunately, this effort your body makes to keep you safe while dreaming can sometimes backfire, resulting in sleep paralysis. Sleep paralysis occurs when the brain is aroused from its REM cycle, but the body remains in its immobilizing state. This can be quite a frightening sensation because, while your mind is slowly regaining consciousness, it has no control over your body, leaving some with a feeling of powerlessness, fear and panic. Most people experience this eerie phenomena at least once in their lives, but those who are sleep deprived are more likely to have panicked episodes of sleep paralysis that are usually accompanied by hallucinations, as well. For a second, imagine all of your memories are erased; every birthday, summer vacation, even what you did yesterday afternoon is completely lost, because you have no recollection of them. It's a chilling thought, but that is what a life without sleep would be like. Sleep is essential to the cognitive functions of the brain, and without it, our ability to consolidate memories, learn daily tasks, and make decisions is impaired by a large degree. Research has revealed that REM sleep, or dream-sleep, helps solidify the "fragile" memories the brain creates throughout the day to that they can be easily organized and stored in the mind's long-term cache.

单选题Later, as one went on to apply for more important lobs, one was advised to include in the letter ______.

单选题Most surveys find that people areU reluctant/U to place themselves at either the top or the bottom of the social ladder.

单选题For many people, overeating and overspending are as ______ to Christmas as candles and holly.(2002年厦门大学考博试题)

单选题He ______ interrupted me by asking many irrelevant questions. A. carelessly B. carefully C. continually D. consequently

单选题{{B}}Passage 4{{/B}} In most American cities, the rent for a one-bedroom apartment was $250 or more per month in recent years. In some smaller cities such as Louisville, Kentucky or Jacksonville, Florida the rent was less, but in larger cities it was more. For example, if you lived in Los Angeles, you had to pay $400 or more to rent a one-bedroom apartment, and the same apartment rented for $625 and up in Chicago. The most expensive rents in the U. S. were in New York City, where you had to pay at least $700 a month to rent a one-bedroom apartment in most parts of the city. Renters and city planners are worried about the high cost of renting apartments. Many cities now have rent control laws to keep the cost of renting low. These laws help low-income families who cannot pay high rents. Rent controls in the United States began in 1943 when the government imposed rent controls on all American cities to help workers and the families of soldiers during World War Ⅱ. After the war, only one city—New York—continued these World War Ⅱ controls. Recently, more and more cities have returned to rent controls. At the beginning of the 1980s, nearly one fifth of the people in the United States lived in cities with rent-control laws. Many cities have rent-control laws, but why are rents so high? Builders and landlords blame rent controls for the high rents. Rents are high because there are not enough apartments to rent, and they blame rent controls for the shortage of apartments. Builders want more money to build more apartment buildings, and landlords want more money to repair their old apartment buildings. But they cannot increase rents to get this money because of the rent-control laws. As a result, landlords are not repairing their old apartments, and builders are not building new apartment buildings to replace the old apartment buildings. Builders are building apartments for high-income families, not low income families, so low-income families must live in old apartments that are in disrepair. Builders and landlords claim that rent-control laws really hurt low income families. Many renters disagree with them. They say that rent control is not the problem. Even without rent controls, builders and landlords will continue to ignore low-income housing because they can make more money from high-income housing. The only answer, they claim, is more rent controls and government help for low-income housing.

单选题According to the passage, the rate of employment can be expected to rise when ______.

单选题Many theories concerning the causes of juvenile delinquency ( crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories (21) on the individual suggest that children engage in criminal behavior (22) they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through (23) with others. Theories focusing on the role of society suggest that children commit crimes in (24) to their failure to rise above their socioeconomic status, (25) as a rejection of middle-class values. Most theories of juvenile delinquency have focused on children from disadvantaged families, (26) the fact that children from wealthy homes also commit crimes. The latter may commit crimes (27) lack of adequate parental control. All theories, however, are tentative and are (28) to criticism. Changes in the social structure may indirectly (29) juvenile crime rates. For example, changes in the economy that (30) to fewer job opportunities for youth and rising unemployment (31) make gainful employment increasingly difficult to obtain. The resulting discontent may in (32) lead more youths into criminal behavior. Families have also (33) changes these years. More families consist of one-parent households or two working parents; (34) , children are likely to have less supervision at home (35) was common in the traditional family structure.

单选题Walrus ivory, which the Eskimos used for weapons and carvings, is now very scarce due to the slaughter of the animals.

单选题______you need any further information, please do not hesitate to let me know.