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My father was a middle-class black. Though he was born poor, he achieved middle-class standing through much hard work and sacrifice(one of his favorite words)and by identifying fully with solid middle-class values—mainly hard work, family life, property ownership, and education for his children(all four of whom have advanced degrees). In his mind these were not so much values as laws of nature. People who embodied them made up the positive images in his class identification. The negative images came largely from the blacks he had left behind because they were "going nowhere.”Whether I live up to these values or not, I know that my acceptance of them is the result of lifelong conditioning. I know also that I share this conditioning with middle-class people of all races and that I can no more easily be free of it than I can be free of my race. For the middle-class black, conditioned by these values from birth, the sense of meaning they provide is as immutable as the color of his skin.It has always annoyed me to hear from the mouths of certain arbiters of blackness that middle-class blacks should "reach back” and pull up those blacks less fortunate than they—as though middle-class status were an unearned and essentially passive condition in which one needed a large measure of noblesse oblige to occupy one’s time. My own image is of reaching back from a moving train to lift on board those who have no tickets. This, I think, is something members of the black middle class can realistically offer to other blacks. But they cannot lead by example until they are released from a black identity that regards that example as suspect, that sees them as “marginally” black, indeed that holds them back by catching them in a double bind.

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Painting, the execution of forms and shapes on a surface by means of pigment, has been continuously practiced by humans for some 20,000 years. Together with other activities(1)ritualistic in origin but have come to be designated as artistic(such as music or dance), painting was one of the earliest ways in which man(2)to express his own personality and his(3)understanding of an existence beyond the material world.(4)music and dance, however, examples of early forms of painting have survived to the present day. The modern eye can derive aesthetic as well as antiquarian satisfaction(5)the 15,000-year-old cave murals of Lascaux — some examples(6)to the considerable powers of draftsmanship of these early artists. And painting, like other arts, exhibits universal qualities that(7)for viewers of all nations and civilizations to understand and appreciate.The major(8)examples of early painting anywhere in the world are found in Western Europe and the Soviet Union. But some 5,000 years ago, the areas in which important paintings were executed(9)to the eastern Mediterranean Sea and neighboring regions.(10), Western shared a European cultural tradition—the Middle East and Mediterranean Basin and, later, the countries of the New World.Western painting is in general distinguished by its concentration(11)the representation of the human(12), whether in the heroic context of antiquity or the religious context of the early Christian and medieval world. The Renaissance(13)this tradition through a(14)examination of the natural world and an investigation of balance, harmony, and perspective in the visible world, linking painting(15)the developing sciences of anatomy and optics. The first real(16)from figurative painting came with the growth of landscape painting in the 17th and 18th centuries. The landscape and figurative traditions developed together in the 19th century in an atmosphere that was increasingly(17)“painterly” qualities of the(18)of light and color and the expressive qualities of paint handling. In the 20th century these interests(19)to the development of a third major tradition in Western painting, abstract painting, which sought to(20)and express the true nature of paint and painting through action and form.

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In the late nineteenth century, ecology began to grow into an independent science from its roots in natural history and plant geography. The emphasis of this new "community ecology" was on the composition and structure of communities consisting of different species. In the early twentieth century, the American ecologist Frederic Clements pointed out that a succession of plant communities would develop after a disturbance such as a volcanic eruption, heavy flood, or forest fire. An abandoned field, for instance, will be invaded successively by herbaceous plants(plants with little or no woody tissue), shrubs, and trees, eventually becoming a forest. Light-loving species are always among the first invaders, while shade-tolerant species appear later in the succession.Clements and other early ecologists saw almost lawlike regularity in the order of succession, but that has not been substantiated. A general trend can be recognized, but the details are usually unpredictable. Succession is influenced by many factors: the nature of the soil, exposure to sun and wind, regularity of precipitation, chance colonizations, and many other random processes.The final stage of a succession, called the climax by Clements and early ecologists, is likewise not predictable or of uniform composition. There is usually a good deal of turnover in species composition, even in a mature community. The nature of the climax is influenced by the same factors that influenced succession. Nevertheless, mature natural environments are usually in equilibrium. They change relatively little through time unless the environment itself changes.For Clements, the climax was a "superorganism," an organic entity. Even some authors who accepted the climax concept rejected Clements1 characterization of it as a superorganism, and it is indeed a misleading metaphor. An ant colony may be legitimately called a superorganism because its communication system is so highly organized that the colony always works as a whole and appropriately according to the circumstances. But there is no evidence for such an interacting communicative network in a climax plant formation. Many authors prefer the term "association" to the term "community" in order to stress the looseness of the interaction.Even less fortunate was the extension of this type of thinking to include animals as well as plants. This resulted in the "biome," a combination of coexisting flora and fauna. Though it is true that many animals are strictly associated with certain plants, it is misleading to speak of a "spruce-moose biome," for example, because there is no internal cohesion to their association as in an organism. The spruce community is not substantially affected by either the presence or absence of moose. Indeed, there are vast areas of spruce forest without moose. The opposition to the Clementsian concept of plant ecology was initiated by Herbert Gleason, soon joined by various other ecologists. Their major point was that the distribution of a given species was controlled by the habitat requirements of that species and that therefore the vegetation types were a simple consequence of the ecologies of individual plant species.1. Ecology had been rooted in( )before it grew into an independent science.2. According to Frederic Clements,( )after a volcanic eruption, heavy flood, or forest fire.3. Succession is influenced by the following factors except( ).4. Which of the following is NOT true about “climax”, according to the passage?5. The concept of "biome" would emphasize that( ).

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While still catching-up to men in some spheres of modern life, women appear to be way ahead in at least one undesirable category. “Women are particularly susceptible to developing depression and anxiety disorders in response to stress compared to men,” according to Dr. Yehuda, chief psychiatrist at New York’s Veteran’s Administration Hospital.Studies of both animals and humans have shown that sex hormones somehow affect the stress response, causing females under stress to produce more of the trigger chemicals than do males under the same conditions. In several of the studies, when stressed-out female rats had their ovaries(the female reproductive organs)removed, their chemical responses became equal to those of the males.Adding to a woman’s increased dose of stress chemicals, are her increased “opportunities” for stress. “It’s not necessarily that women don’t cope as well. It’s just that they have so much more to cope with,” says Dr. Yehuda. “Their capacity for tolerating stress may even be greater than men’s,” she observes, “it’s just that they’re dealing with so many more things that they become worn out from it more visibly and sooner.”Dr. Yehuda notes another difference between the sexes. “I think that the kinds of things that women are exposed to tend to be in more of a chronic or repeated nature. Men go to war and are exposed to combat stress. Men are exposed to more acts of random physical violence. The kinds of interpersonal violence that women are exposed to tend to be in domestic situations, by, unfortunately, parents or other family members, and they tend not to be one-shot deals. The wear-and-tear that comes from these longer relationships can be quite devastating.”Adeline Alvarez married at 18 and gave birth to a son, but was determined to finish college. “I struggled a lot to get the college degree. I was living in so much frustration that that was my escape, to go to school, and get ahead and do better.” Later, her marriage ended and she became a single mother. “It’s the hardest thing to take care of a teenager, have a job, pay the rent, pay the car payment, and pay the debt. I lived from paycheck to paycheck.”Not everyone experiences the kinds of severe chronic stresses Alvarez describes. But most women today are coping with a lot of obligations, with few breaks, and feeling the strain. Alvarez’s experience demonstrates the importance of finding ways to diffuse stress before it threatens your health and your ability to function.1. Paragraph 2 states that( ).2. Dr. Yehuda’s study found that women( ).3. One difference between the sexes is that the stress women confront tends to be( ).4. What is the meaning of “I lived from paycheck to paycheck.”(Line 6, Para. 5)?5. The best title for this text would be( ).

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In 2010, a federal judge shook America's biotech industry to its core. Companies had won patents for isolated DNA for decades - by 2005 some 20% of human genes were patented. But in March 2010 a judge ruled that genes were unpatentable. Executives were violently agitated. The Biotechnology Industry Organisation(BIO), a trade group, assured members that this was just a "preliminary step" in a longer battle.On July 29th they were relieved, at least temporarily. A federal appeals court overturned the prior decision, ruling that Myriad Genetics could indeed hold patents to two genes that help forecast a woman's risk of breast cancer. The chief executive of Myriad, a company in Utah, said the ruling was a blessing to firms and patients alike.But as companies continue their attempts at personalised medicine, the courts will remain rather busy. The Myriad case itself is probably not over. Critics make three main arguments against gene patents: a gene is a product of nature, so it may not be patented; gene patents suppress innovation rather than reward it; and patents' monopolies restrict access to genetic tests such as Myriad's. A growing number seem to agree. Last year a federal task-force urged reform for patents related to genetic tests. In October the Department of Justice filed a brief in the Myriad case, arguing that an isolated DNA molecule "is no less a product of nature... than are cotton fibers that have been separated from cotton seeds."Despite the appeals court's decision, big questions remain unanswered. For example, it is unclear whether the sequencing of a whole genome violates the patents of individual genes within it. The case may yet reach the Supreme Court.As the industry advances, however, other suits may have an even greater impact. Companies are unlikely to file many more patents for human DNA molecules - most are already patented or in the public domain. Firms are now studying how genes interact, looking for correlations that might be used to determine the causes of disease or predict a drug's efficacy. Companies are eager to win patents for 'connecting the dots', explains Hans Sauer, a lawyer for the BIO.Their success may be determined by a suit related to this issue, brought by the Mayo Clinic, which the Supreme Court will hear in its next term. The BIO recently held a convention which included sessions to coach lawyers on the shifting landscape for patents. Each meeting was packed.1. Paragraph 1 suggests that the biotech companies would like( ).2. The possible reason why genes are not patentable is that( ).3. Companies are eager to win patents for( ), according to Hans Sauer.4. "Each meeting was packed"(line4, para6)implies that( ).5. The author's attitude toward gene patenting is generally one of( ).

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If the trade unionist Jimmy Hoffa were alive today, he would probably represent civil servant. When Hoffa’s Teamsters were in their prime in 1960, only one in ten American government workers belonged to a union; now 36% do. In 2009 the number of unionists in America’s public sector passed that of their fellow members in the private sector. In Britain, more than half of public-sector workers but only about 15% of private-sector ones are unionized.There are three reasons for the public-sector unions’ thriving. First, they can shut things down without suffering much in the way of consequences. Second, they are mostly bright and well-educated. A quarter of America’s public-sector workers have a university degree. Third, they now dominate left-of-centre politics. Some of their ties go back a long way. Britain’s Labor Party, as its name implies, has long been associated with trade unionism. Its current leader, Ed Miliband, owes his position to votes from public-sector unions.At the state level their influence can be even more fearsome. Mark Baldassare of the Public Policy Institute of California points out that much of the state's budget is patrolled by unions. The teachers' unions keep an eye on schools, the CCPOA on prisons and a variety of labor groups on health care.In many rich countries average wages in the state sector are higher than in the private one. But the real gains come in benefits and work practices. Politicians have repeatedly “backloaded” public-sector pay deals, keeping the pay increases modest but adding to holidays and especially pensions that are already generous.Reform has been vigorously opposed, perhaps most egregiously in education, where charter schools, academies and merit pay all faced drawn-out battles. Even though there is plenty of evidence that the quality of the teachers is the most important variable, teachers’ unions have fought against getting rid of bad ones and promoting good ones.As the cost to everyone else has become clearer, politicians have begun to clamp down. In Wisconsin the unions have rallied thousands of supporters against Scott Walker, the hardline Republican governor. But many within the public sector suffer under the current system, too.John Donahue at Harvard’s Kennedy School points out that the norms of culture in Western civil services suit those who want to stay put but is bad for high achievers. The only American public-sector workers who earn well above $250,000 a year are university sports coaches and the president of the United States. Bankers’ fat pay packets have attracted much criticism, but a public-sector system that does not reward high achievers may be a much bigger problem for America.1. Paragraph 1 suggests that( ).2. According to Paragraph 2,( ).3. Paragraph 4 points out that the income in the state sector is( ).4. It can be learned from the example of the unions in Wisconsin that unions( )5. What is John Donahue’s attitude towards the public-sector system?

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