单选题The wildlife biologist told my father the sanohill cranes ______ through Warner were rare and vanishing creature.

单选题Aviation experts believe that the customer service of the major airlines

单选题They are ______ investors who always make thorough investigations both on local and international markets before making an investment. A) indecisive B) implicit C) cautious D) conscious

单选题At the same time, medical and social science research began to indicate that retirement itself had detrimental effects. A. damaging B. magnificent C. useful D. relevant

单选题{{B}}Text 4{{/B}} It is hard to get any agreement on the precise meaning of the term "social class" In everyday life, people tend to have a different approach to those they consider their equals from that which they assume with people they consider higher or lower than themselves in the social scale. The criteria we use to place a new acquaintance, however, are a complex mixture of factors. Dress, way of speaking, area of residence in a given city or province, education and manners all play a part. In the eighteenth-century one of the first modern economists, Adam Smith, thought that the "whole annual produce of the land and labor of every country' provided revenue to "three different orders of people: Those who live by rent, those who live by wages, those who live by profit" . Each successive stage of the industrial revolution, however, made the social structure more complicated. Many intermediate groups grew up during the nineteenth-century between the upper middle class and the working class. There were small-scale industrialists as well as large ones, small shopkeepers and tradesmen, officials and salaried employees, skilled and unskilled workers, and professional men such as doctors and teachers. Farmers and peasants continued in all countries as independent groups. During the nineteenth and early twentieth centuries the possession of wealth inevitably affected a person's social position. Intelligent industrialists with initiative made fortunes by their wits which lifted them into an economic group far higher than their working-class parents. But they lacked the social training of the upper class, who despised them as the "new rich" . They often sent their sons and daughters to special schools to acquire social training. Here their children mixed with the children of the upper classes were accepted by them, and very often found marriage partners from among them. In the same way, a thrifty, hardworking labourer, though not clever enough himself, might save for his son enough to pay for an extended secondary school education in the hope that he would move into a white-collar' occupation, carrying with it a higher salary and move up in the social scale. In the twentieth century the increased taxation of higher incomes, the growth of the social services, and the wider development of educational opportunity have considerably altered the social outlook. The upper classes no longer are the sole, or even the main possessors of wealth, power and education, though inherited social position still carries considerable prestige. Many people today are hostile towards class distinctions and privileges and hope to achieve a classless society. The trouble is that as one inequality is removed, another tends to take its place, and the best that has as far been attempted is a society in which distinctions are elastic and in which every member has fair opportunities for making the best of his abilities.

单选题Science analysts are worried that China, in the course of biotech development, ______.

单选题The Supreme Court"s decisions on physician-assisted suicide carry important implications for how medicine seeks to relieve dying patients of pain and suffering. Although it ruled that there is no constitutional right to physician-assisted suicide, the Court in effect supported the medical principle of "double effect", a centuries-old moral principle holding that an action having two effects—a good one that is intended and a harmful one that is foreseen—is permissible if the actor intends only the good effect. Doctors have used that principle in recent years to justify using high doses of morphine to control terminally ill patients" pain, even though increasing dosages will eventually kill the patient. Nancy Dubler, director of Montefiore Medical Center, contends that the principle will shield doctors who "until now have very, very strongly insisted that they could not give patients sufficient mediation to control their pain if that might hasten death." George Annas, chair of the health law department at Boston University, maintains that, as long as a doctor prescribes a drug for a legitimate medical purpose, the doctor has done nothing illegal even if the patient uses the drug to hasten death. "It"s like surgery," he says. "We don"t call those deaths homicides because the doctors didn"t intend to kill their patients, although they risked their death. If you"re a physician, you can risk your patient"s suicide as long as you don"t intend their suicide." On another level, many in the medical community acknowledge that the assisted-suicide debate has been fueled in part by the despair of patients for whom modem medicine has prolonged the physical agony of dying. Just three weeks before the Court"s ruling on physician-assisted suicide, the National Academy of Science (NAS) released a two-volume report, Approaching Death: Improving Care at the End of Life. It identifies the under treatment of pain and the aggressive use of "ineffectual and forced medical procedures that may prolong and even dishonor the period of dying" as the twin problems of end-of-life care. The profession is taking steps to require young doctors to train in hospices, to test knowledge of aggressive pain management therapies, to develop a Medicare billing code for hospital-based care, and to develop new standards for assessing and treating pain at the end of life. Annas says lawyers can play a key role in insisting that these well-meaning medical initiatives translate into better care. "Large numbers of physicians seem unconcerned with the pain their patients are needlessly and predictably suffering," to the extent that it constitutes "systematic patient abuse". He says medical licensing boards "must make it clear.., that painful deaths are presumptively ones that are incompetently managed and should result in license suspension. "

单选题Based on the information in the passage, what can be inferred about X-ray microscopes in the future?

单选题Once upon a time there lived a beautiful young woman and a handsome young man. They were very poor, but as they were deeply in love, they wanted to get married. The young people's parents shook their heads. "You can't get married yet," they said. "Wait till you get a good job with good prospects." So the young people waited until they found good jobs with good prospects and they were able to get married. They were still poor, of course, but large organizations lent him the money he needed to buy a house, some furniture, all the latest electrical appliances and a car. The couple lived happily ever after, paying off debts for the rest of their lives. And so ends another modern romantic fable. We live in a materialistic society and when we grow old enough to earn a living, it does not surprise us to discover that success is measured in terms of the money you earn. We spend the whole of our lives keeping up with the Joneses. If we buy a new car, we can be sure that Jones will go on better and get two new cars: one for his wife and one for himself. The most amusing thing about this game is that the Joneses and all the neighbors who are struggling frantically to keep up with them are spending borrowed money kindly provided, at a suitable rate of interest, of course, by friendly banks, insurance companies, etc. It is not only in affluent societies that people are obsessed with the idea of making more money. Consumer goods are desirable everywhere and modern industry deliberately sets out to create new markets. Gone are the days when industrial goods were made to last forever. The wheel of industry must be kept turning. "Built-in obsolescence" provides the means: goods are made to be discarded. Cars get tinnier and tinnier. You no sooner acquire this year's model than you are thinking about its replacement.

单选题When two hands meet, we pass on something of ourselves. After (41) to Mark Twain, Helen—who was both deaf and blind—commented, "I can feel the twinkle of his eye (42) his handshake." In some indefinable way, Twain had (43) his charm to Keller. And that's probably been true of the handshake all the (44) back to its earliest days, (45) no one can tell its actual (46) . A common explanation is that (47) early man encountered a stranger, he (48) out his hand to show he had no weapon. From this, supposedly, (49) the handshake. "Not so", says historian Brian Burke. He believes, the handshake (50) "putting your blood behind your breath." He explains that ancient people (51) the spoken word alone, and they used the handclasp to signify that their (52) was backed up by the (53) of their heart—i.e., their blood. (54) , the handshake suggested trust. That (55) of trust has survived to this day. People in business often (56) agreements simply by declaring, "Let's shake (57) it." Perhaps the most (58) handshake took place on July 17, 1975, during the Apollo Soyuz get together in space. After the two crafts came together, American astronaut Thomas Stafford (59) the extended hand of Soviet cosmonaut Alexey Leonov. The (60) to the world was one of friendship and peace.

单选题In North Dakota, which had barely an inch of rain in four months, there was no grass for cattle. Farmers tramped their dusty fields, watching their dwarfed stand of grain shrivel and ______. A. survive B. wail C. perish D. swell

单选题Barbara ______ in doing it again though she had failed more than a dozen times.A. insisted B. persisted C. assisted D. consisted

单选题 In the idealized version of how science is done, facts about the world are waiting to be observed and collected by objective researchers who use the scientific method to carry out their work. But in the everyday practice of science, discovery frequently follows an ambiguous and complicated route. We aim to be objective, but we cannot escape the context of our unique life experience. Prior knowledge and interest influence what we experience, what we think our experiences mean, and the subsequent actions we take. Opportunities for misinterpretation, error, and self-deception abound. Consequently, discovery claims should be thought of as proto science. Similar to newly staked mining claims, they are full of potential. But it takes collective scrutiny and acceptance to transform a discovery claim into a mature discovery. This is the credibility process; through which the individual researcher's me, here, now becomes the community's anyone, anywhere, anytime. Objective knowledge is the goal, not the starting point. Once a discovery claim becomes public, the discoverer receives intellectual credit. But, unlike with mining claims, the community takes control of what happens next. Within the complex social structure of the scientific community, researchers make discoveries; editors and reviewers act as gatekeepers by controlling the publication process; other scientists use the new finding to suit their own purposes; and finally, the public (including other scientists) receives the new discovery and possibly accompanying technology. As a discovery claim works it through the community, the interaction and confrontation between shared and competing beliefs about the science and the technology involved transforms an individual's discovery claim into the community's credible discovery. Two paradoxes exist throughout this credibility process. First, scientific work tends to focus on some aspect of prevailing Knowledge that is viewed as incomplete or incorrect. Little reward accompanies duplication and confirmation of what is already known and believed. The goal is new-search, not research. Not surprisingly, newly published discovery claims and credible discoveries that appear to be important and convincing will always be open to challenge and potential modification or refutation by future researchers. Second, novelty itself frequently provokes disbelief. Nobel Laureate and physiologist Albert Azent-Gyorgyi once described discovery as "seeing what everybody has seen and thinking what nobody has thought. " But thinking what nobody else has thought and telling others what they have missed may not change their views. Sometimes years are required for truly novel discovery claims to be accepted and appreciated. In the end, credibility " happens" to a discovery claim-a process that corresponds to what philosopher Annette Baier has described as the commons of the mind. "We reason together, challenge, revise, and complete each other's reasoning and each other's conceptions of reason. "

单选题Water ______ into vapor by the sun falls as rain. A. turns B. turned C. turning D. is turned

单选题At the wholesale store you can buy an 8-pack of hot dogs for $1.55, a 20-pack for $3.05, and a 250-pack for $22.95. What is the greatest number of hot dogs you can buy at this store with $200? A. 1,108 B. 2,100 C. 2,108 D. 2,124 E. 2,256

单选题Your kindness in giving ______ to the consideration of the above problem will be highly appreciated. A. importance B. advantage C. priority D. authority

单选题There was something wrong with the traffic signal. Our bus was ______ for nearly half an hour. A. held on B. held back C. held out D. held up

单选题The narrator of The Great Gatsby is ______.

单选题The news says: An airline ______ kills more than 100 passengers.