单选题(By the 1980s) more than (two-fifth of) U.S. crop production was exported, (making) U.S. agriculture heavily (dependent) upon international markets.

单选题Most people who developed Lyme disease, a tick-born infection that's endemic in parts of the Northeast and Midwest, are easily cured by taking an antibiotic like doxycycline for a couple of weeks. But for years a debate has raged over what to do about patients whose symptoms(fatigue, mental confusion, joint pain)never seem to clear up. One small but vocal group of doctors and patient advocates believes that Lyme's corkscrew-shaped spirochetes have tunneled deep into their victims' bodies and can be eradicated only with intensive antibiotic treatment over many months. Another group believes, just as adamantly, that further treatment with powerful antibiotics — which can lead to potentially fatal infections or blood clots — positively dangerous. Now comes word of two studies in the New England Journal of Medicine that show that long-term antibiotic treatment is no better than a placebo for folks with chronic Lyme disease. Originally scheduled for publication in July, the research is part of a group of findings made public last week — just in time for the peak Lyme months of June and July. If confirmed by another major study that's looking at chronic Lyme and antibiotics from a slightly different perspective, the results would seem to settle the question once and for all. Researchers from Boston, New Haven, Com. , and Valhalla, N. Y. , followed 129 patients who had previously been treated for well-documented cases of Lyme disease. Sixty-four were given antibiotics directly into their veins for a month, followed by two months of oral antibiotics. The others received dummy medications. A third of the chronic Lyme patients got better while taking the antibiotics. But so did a third of those on the placebo. Indeed, the results were so similar that a monitoring board decided to cut the trials short rather than add more subjects to the test groups. Unfortunately, the debate over chronic Lyme has become so heated that no one expects the controversy to go away. But both sides may take comfort in the other findings that were released by the New England Journal last week. After studying 482 subjects bitten by deer ticks in a part of New York with a lot of Lyme disease, researchers concluded that a singly 200-mg dose of doxycycline dramatically cut the risk of contracting the disease. That good news is tempered somewhat by the fact that 80% of patients who develop the infection don't remember ever being bitten by a tick.(The bugs inject an anesthetic into the skin to mask the pain and in their nymph stage are so small — about the size of a poppy seed — that they are easily overlooked.) There's still plenty you can do to protect yourself in a Lyme-infested neighborhood: tuck your pants in your socks, spray DEET on your clothing, check yourself and your kids for ticks. And if you develop a spreading red rash — particularly if it's accompanied by joint pain, chills or confusion — make sure you see a doctor right away. The trick, as always, is to be vigilant without overreacting.

单选题The ______ era society or club are the records of its doings, especially as published each year.

单选题The typical shoe of the Middle Ages was a soft, clinging moccasin that extended to the ankle. A. close-fitting B. comfortable C. cleverly made D. leather

单选题{{B}}Passage 3{{/B}} "Before, we were too black to be white. Now. we're too white to be black. " Hadija, one of South Africa's 3. 5m Coloured (mixed race) people, sells lace curtains at a street market in a bleak township outside Cape Town. In 1966 she and her family were driven out of District Six, in central Cape Town, by an apartheid government that wanted the area for whites. Most of the old houses and shops were bulldozed but a Methodist church, escaping demolition, has been turned into a little museum, with an old street plan stretched across the floor. On it, families have identified their old houses, writing names and memories in bright felt-tip pen. "We can forgive, but not forget," says one. Up to a point. In the old days, trampled on by whites, they were made to accept a second-class life of scant privileges as a grim reward for being lighter-skinned than the third-class blacks. Today, they feel trampled on by the black majority. The white-led National Party, which still governs the Western Cape, the province where some 80% of Coloureds live, plays on this fear to good electoral effect. With no apparent irony, the party also appeals to the Coloured sense of common culture with fellow Afrikaans-speaking whites, a link the Nats have spent decades denying. This curious.courtship is again in full swing. A municipal election is to be held in the province on May 29th and the Nats need the Coloured vote if they are to win many local councils. By most measures, Coloureds are still better-off than blacks. Their jobless rate is high, 21% according to the most recent figures available. But the black rate is 38%. Their average yearly income is still more than twice that of blacks. But politics turns on fears and aspirations. Most Coloureds fret that affirmative action, the promotion of non-whites into government-related jobs, is leaving them behind. Affirmative action is supposed to help Coloureds (and Indians) too. It often does not. They may get left off a shortlist because, for instance, a job requires the applicant to speak a black African language, such as Xhosa. Some Coloureds think that the only way they will improve their lot is to launch their own. ethnically based, political parties. Last year a group formed the Kleurling Weer-standsbeweging, or Coloured Resistance Movement. But in-fighting caused this to crumble: some members wanted it to promote Coloured interests and culture; others to press for an exclusive "homeland". In fact, the Coloureds' sense of collective identity is undefined, largely imposed by apartheid's twisted logic. They are descended from a mix of races, including the Khoi and San (two indigenous African peoples), Malay slaves imported by the Dutch, and white European settlers. And though they do indeed share much with Afrikaners—many belong to the Dutch Reformed Church and many speak Afrikaans—others speak English or are Muslim or worship spirits. Under apartheid, being Coloured became something to try to escape from. Many tried to pass as white; some succeeded in getting "reclassified". Aspiring to whiteness and fearful of blackness, their identity is hesitant, even defensive. Many Coloureds feel most sure about what they are not. they vigorously resist any attempt to use the term "black" to embrace all nonwhite people. "My people are terrible racists, but not by choice," says Joe Marks, a Coloured member of the Western Cape parliament. "The blacks today have the political power, the whites have economic power. We just have anger. "

单选题Researchers have studied the poor as individuals, as families and households, as members of poor communities, neighborhoods and regions, as products of larger poverty-creating structures. They have been analyzed as victims of crime and criminals, as members of minority cultures, as passive consumers of mass culture and active producers of a "counterculture", as an economic burden and as a reserve army of labor—to mention just some of the preoccupations of poverty research. The elites, who occupy the small upper stratum within the category of the non-poor, and their functions in the emergence and reproduction of poverty are as interesting and important an object for poverty research as the poor themselves. The elites have images of the poor and of poverty which shape their decisions and actions. So far, little is known about those images, except as they are sketchily portrayed in popular stereotypes. The elites may well ignore or deny the external effects of their own actions (and omissions) upon the living conditions of the poor. Many social scientists may take a very different view. As poverty emerged and was reproduced, legal frameworks were created to contain the problems it caused with profound, and largely unknown, consequences for the poor themselves. In general, political, educational and social institutions tend to ignore or even damage the interests of the poor. In constructing a physical infrastructure for transport, industry, trade and tourism, the settlements of the poor are often the first to suffer or to be left standing and exposed to pollution, noise and crowding. Most important are the economic functions of poverty, as, for lack of other options the poor are forced to perform activities considered degrading or unclean. The poor are more likely to buy second-hand goods and leftover foodstuffs, thus prolonging their economic utility. They are likely to use the services of low-quality doctors, teachers and lawyers whom the non-poor shy away from. Poverty and the poor serve an important symbolic function, in reminding citizens of the lot that may befall those who do not heed the values of thrift, diligence and cleanliness, and of the constant threat that the rough, the immoral and the violent represent for the rest of society. Physically, the poor and the non-poor are kept apart, through differential land use and ghettoization. Socially, they are separated through differential participation in the labor market, the consumption economy, and in political, social and cultural institutions. Conceptually, they are divided through stereotyping-and media cliche. This separation is even more pronounced between the elites and the poor.

单选题You really ought to ______; all these late nights are doing you no good.

单选题He failed to carry out some of the provisions of the contract, and now he has to ______the consequences.

单选题Presumably , excessive consumption of fried foods has serious consequences as has been proved.

单选题New technologies continue to be a driving force, as developments in satellites, digital video, and ______ multimedia that have yet to work their way into broadcast or cable are becoming essential to corporate TV operations.

单选题What can be inferred from the question: But how does it serve a society in which people may have to retrain and recreate their careers throughout their adult lives?

单选题 Questions 11-15 are based on the following passage. Among the many ways in which people communicate through speech, public speaking has probably received more study and attracted more attention than any other. Politicians campaigning for public office, salespeople presenting products, and preachers delivering sermons all depend upon this form of public communication. Even people who do not make speaking a part of their daily work are often asked to make public speeches: students at graduation, for instance, or members of churches, clubs, or other organizations. Nearly everyone speaks in public at some time or other, and those who perform the task well often become leaders. There are many reasons for speaking in public. A public speaker may hope to teach an audience about new ideas, for example, or provide information about some topic. Creating a good feeling or entertaining an audience may be another purpose. Public speakers, however, most often seek to persuade an audience to adopt new opinions, to take certain actions, or to see the world in a new way. Public speakers usually know well in advance when they are scheduled to make an address. Consequently, they are able to prepare their message before they deliver it. Sometimes, though, speakers must deliver the message unprepared, or off the cuff, such as when they are asked to offer a toast at a wedding reception or to participate in a televised debate or interview. When they do not have to speak unprepared, most speakers write their own speeches. Politicians and business executives sometimes employ professional writers who prepare their speeches for them. These professional writers may work alone or in small teams. Although the speaker may have some input into the contents of the speech, the writers sometimes have a great influence over the opinions expressed by their employers. Regardless of how a speech is prepared, the person who delivers it is given credit for its effect upon its hearers.

单选题Mary hopes to be ______ from hospital next week.(2007年中南大学考博试题)

单选题Wherever two or more unusual {{U}}traits{{/U}} or situations are found in the same place, it is tempting to look for more than a coincidental relationship between them.

单选题The expression "scratch the surface" most probably means ______.

单选题It is the first of several agreements that United States hopes to reach as it attempts to reduce, labor costs by $5.8 billion and ______ bankruptcy.(2003年厦门大学考博试题)

单选题The most significant phrases appeared toU denote /Uthat Russia was "already broken" and would "never rise again".

单选题{{B}}Passage Three{{/B}} This week marks the 10th anniversary of the Alar apple scare, in which many American consumers were driven into a panic following the release of a report by an environmental organization claiming that apples containing the chemical Alar posed a serious health threat to preschoolers. The report was disseminated through a PR (Problem Report) campaign and bypassed any legitimate form of scientific peer review. Introduced to the American public by CBS' "60 Minutes," the unsubstantiated claims in the report led some school districts to remove apples from their school lunch programs and unduly frightened conscientious parents trying to develop good eating habits for their children. Last month, Consumers Union released a report warning consumers of the perils of consuming many fruits and vegetables that frequently contained "unsafe" levels of pesticide residues. This was especially true for children, they claimed. Like its predecessor 10 years earlier, the Consumers Union report received no legitimate scientific peer review and the public's first exposure to it was through news coverage. Not only does such reporting potentially drive children from consuming healthful fruits and vegetables, the conclusions were based on a misleading interpretation of what constitutes a "safe" level of exposure. Briefly, the authors used values known as the "chronic reference doses," set by the U. S. Environmental Protection Agency, as their barometers of safety. Used appropriately, these levels represent the maximum amount of pesticide that could be consumed daily for life without concern. For a 70-year lifetime, for example, consumers would have to ingest this average amount of pesticide every day for more than 25, 000 days. It is clear, as the report points out, that there are days on which kids may be exposed to more; it is also clear that there are many more days when exposure is zero. Had the authors more appropriately calculated the cumulative exposures for which the safety standards are meant to apply, there would have been no risks and no warnings. Parents should feel proud, rather than guilty, of providing fruits and vegetables for their children. It is well established that a diet rich in such foods decreases the risk of heart disease and cancer. Such benefits dramatically overwhelm the theoretical risks of tiny amounts of pesticides in food. So keep serving up the peaches, apples, spinach, squashes, grapes and pears.