单选题(Like expected), experimental (studies) show that we should neither run nor scream when (encountering) a fierce animal (like) a lion.

单选题Cinderella's fairy godmother ______ a pumpkin into a carriage.

单选题Until recently, such ______ was limited to telephone questions and answers much like daytime talk shows.

单选题The pioneers' greatest asset was not their material wealth but their ______.

单选题Victoria ______ over a great variety of peoples and lands.

单选题Certainly no creature in the sea is odder than the common sea cucumber. All living creatures, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about a bizarre animal that among other eccentricities, eats mud, feeds almost continuously day and night but can live without eating for long periods, and can be poisonous but is considered supremely edible by gourmets? For some fifty million years, despite all its eccentricities, the sea cucumber has subsisted on its diet of mud. It is adaptable enough to live attached to rocks by its tube feet, under rocks in shallow water, or on the surface of mud flats. Common in cool water on both Atlantic and Pacific shores, it has the ability to suck up mud or sand and digest whatever nutrients are present. Sea cucumbers come in a variety of colors, ranging from black to reddish-brown to sand-colored and nearly white. One form even has vivid purple tentacles. Usually the creatures are cucumber-shaped—hence their name and because they are typically rock inhabitants, this shape, combined with their flexibility, enables them to squeeze into crevices where they are safe from predators and ocean currents. Although they have voracious appetites, eating day and night, sea cucumbers have the capacity to become quiescent and live at a low metabolic rate—feeding sparingly or not at all for long periods, so that the marine organisms that provide their food have a chance to multiply. If it were not for this faculty, they would devour all the food available in a short time and would probably starve themselves out of existence. But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs. When attacked, it squirts all its internal organs into the water. It also casts off attached structures such as tentacles. The sea cucumber will eviscerate and regenerate itself if it is attacked or even touched: it will do the same if the surrounding water temperature is too high or the water becomes too polluted.

单选题2 At home Theodore Roosevelt had affection, not compliments, whether these were unintentional and sincere or were thinly disguised flattery. And affection was what he most craved from his family and nearest friends, and what he gave to them without stint. As I have said, he allowed nothing to interrupt the hours set apart for his wife and children while he was at the White House; and at Oyster Bay there was always time for them. A typical story is told of the boys coming in upon him during a conference with some important visitor, and saying reproachfully, "It's long after four o'clock, and you promised to go with us at four. " "So I did," said Roosevelt. And he quickly finished his business with the visitor and went. When the children were young, he usually saw them at supper and into bed, and he talked of the famous pillow fights they had with him. House guests at the White House some times unexpectedly caught sight of him crawling in the entry near the children's rooms, with two or three children riding on his hack. Roosevelt's days were seldom less than fifteen hours long, and we can guess how he regarded the laboring men of today who clamor for eight and six, and even fewer hours, as the normal period for a day's work. He got up at half-past seven and always finished breakfast by nine, when what many might call the real work of his day began. The unimaginative laborer probably supposes that most of the duties which fall to all industrious President are not strictly work at all;but if any one had to meet for an hour and a half every forenoon such Congressmen and Senators as chose to call on him, he would understand that that was a job involving real work, hard work. They came every day with a grievance, or an appeal, or a suggestion, or a favor to ask, and he had to treat each one, not only politely, but more or less differently. Early in his Administration I heard it said that he offended some Congressmen by denying their requests in so loud a voice that others in the room could hear him, and this seemed to some a humilia- tion. President McKinley, on the other hand, they said, lowered his voice, and spoke so softly and sweetly that even his refusal did not jar on his visitor, and was not heard at all by the bystanders. If this happened, I suspect it was because Roosevelt spoke rather explosively and had a habit of emphasis, and not because he wished in any way to send his petitioner's rebuff through the room. Nor was the hour which followed this, when he received general callers, less wearing. As these persons came from all parts of the Union, so they were of all sorts and temperaments. Here was a worthy citizen from Colorado who, on the strength of having once heard the President make a public speech in Denver, claimed immediate friendship with him. Then might come an old lady from Georgia, who remembered his mother's people there, or the lady from Jacksonville, Florida, of whom I have already spoken. Once a little boy, who was almost lost in the crush of grown-up visitors, managed to reach the President. "What can I do for you?" the President asked; and the boy told how his father had died leaving his mother with a large family and no money, and how he was selling typewriters to help support her. His mother, he said, would be most grateful if the President would accept a typewriter from her as a gift. So the President told the little fellow to go and sit down until the other visitors had passed, and then he would attend to him. No doubt, the boy left the White House well contented--and richer.

单选题The farmer was horrified at the ______ that he has dug from under the field.

单选题It is a ______ not worthy of such heated argument. [A] trifle [B] trivial [C] pride [D] understanding

单选题The majority of the observers at the conference, in contradiction to the delegates, were opposed to ratification.

单选题It's often hard to see your mistakes as you're making them. When it comes to living arrangements, a humdinger is being made in this country right now and few have noticed it yet. "Yikes!The kids are moving back in!" Thus goes the mantra of the baby boom generation, circa 2007. Analysts estimate that some 18 million adults between the ages of 20 and 34 live with their parents. That's roughly a third of that age group. But letting the kids move back in is not the societal error we're talking about. Instead, the big mistake is the loudly voiced chagrin of the boomers. Most mistakenly decry the notion of the boomerang generation. In order to fully appreciate the depth of the error being made here, we all need to step back a bit and look at the bigger picture. This epidemic of kids moving back home is first, not "unprecedented," and second, it's not a bad thing. The precedent for this trend can be found among the other 6.2 billion non-Americans on the planet, many of whom happily live with their adult children, often in three-generation households. Then there's the growing number of non-Anglo Americans, including many recent immigrants, who see no problem in having adult kids contribute to the household. Finally, the agrarian history of this country before World War II allowed kids to live and work around the farm weI1 into adulthood. Adult kids moving back home is merely the most noticeable symptom of a larger, fundamental transformation of American society. We are nationally beginning to recognize the costs of the independence the so-called greatest generation foisted on us. We can't blame them. They did have to grow up fast. Kids in their generation went off to World War II and grew up on the bloody beaches of distant lands. After the war, the survivors had factories to build and the wealth to buy their white-picket-fence dream out West. They designed a social and fiscal system that has served their retirement years very well. But their historically unique retirement system mistakenly celebrated independence and ignored the natural state of human beings--that is, interdependence. Moreover, their system breaks down with the onslaught of their kids' retirement. We can already see the pension systems, both private and public, beginning to disintegrate under the weight of the baby boomers. We are now just starting to understand the substantial fiscal and psychological costs of separating the generations into so-called single-family homes with the ideal of a mother, father and two kids. But times change and so do cultures. Regarding boomerang kids, most demographers focus on the immediate explanations for the changes, such as the growing immigrant population, housing shortages and high prices, and out-of-wedlock childbearing. Many psychologists have noted that baby-boomer parents enjoy closer relationships with their fewer children that allow extended cohabitation. A recent survey conducted for Del Webb (a division of Pulte Homes Inc.)reports that only about one-quarter of baby boomers are happier once the kids move out. However, all these explanations are simply symptoms of the larger, more fundamental reuniting of Americans into households that include extended families--adult, kids, grandparents, grandchildren and other relatives -- rather than just nuclear families. The rate at which our American culture is adapting will accelerate as baby boomers begin retiring in waves. Creative housing arrangements are necessitating and allowing three generations to live together again- under one roof or in close proximity. Now some 6 million American grandparents are living under one roof with their grandchildren. Whether grandparents live in accessory apartments on the property or houses next door, these flexible housing options provide privacy and companionship at the same time. Grandparents can interact with their grandchildren while the parents work, and all benefit from the new togetherness. These 21st century housing arrangements are a creative way to handle the financial needs of the generation that is retiring and, yes, the adult children who are coming home. Such multigenerational households don't make sense for everyone. Personality conflicts or family characteristics preclude such arrangements for some. Legal constraints such as building and zoning codes are formidable obstacles in most communities across the country. Often more room is mandated for parking your car than parking your grandmother. Home builders have been more interested in selling houses that satisfy immediate needs rather than anticipating the needs of the growing numbers of aging Americans. The culture itself frequently gets in the way, reinforcing the perception of a stigma attaching to lack of independence- the adult child who just won't move out (and grow up) or the aging grandparent who eschews "being a burden". Despite these problems, once you begin talking with your friends about three-generation households, you will begin hearing stories about how such obstacles are being overcome. You also will begin hearing stories about the wonderful benefits of thinking about housing and family arrangements in creative ways. And you'll hear stories about the fundamental satisfaction of living together again.

单选题Mrs. Green received an ______ letter threatening to expose her private life if she refused to pay $10,000.(2010年北京航空航天大学考博试题)

单选题Passage 4 Plant adaptation can be remarkably complex. Certain species of orchids, for instance, imitate female bees, other plants look and smell like animals, and still others have the appearance of stone. These strange adaptations to life represent just a few of the sophisticated means by which plants enhance their chances of survival. Mimicry in plants or animals is a three-part system. There is a model; the animal, plant, or substrate being imitated. There is a mimic; the organism that imitates the model. And there is a signal receiver or dupe; the animal that cannot effectively distinguish between the model and the mimic. Mimetic traits may include morphological structures, color patterns, behaviors, or other attributes of the mimic that promote its resemblance to a model. That model may be either an unrelated species or an inanimate objects such as the background against which an organism spends most of its time. Mimicry is not an active strategy on the part of an individual plant; flowers do no deliberately trick or deceive animals into visiting them. Mimicry arises as the result of evolution through natural selection and the occurrence of random generic mutations that lead over many generations to the appearance of favorable characteristics. If such traits help to camouflage a plant, for example, the plant is likely to have survival advantage over other plants that are less well camouflaged. The plant will leave more descendants, thereby passing the advantage to the next generation. For natural selection to favor the evolution of mimicry, the mimic must derive a reproductive advantage from modeling itself after another organism or object; its fitness, measured as the number of offspring produced that survive into the next generation must be increased as the result of deception.

单选题Shoes of this kind are______to slip on wet ground.

单选题The people were tired of reform crusades; they wanted no part of an idea that might ttirn into a______.

单选题______ tile bad weather, we decided to go to the picnic.

单选题The Spanish temperament is ______ from that of the Portuguese.

单选题According to the writer, intensifying global competition and immigration will ______.

单选题 Euthanasia is clearly a deliberate and intentional aspect of a killing. Taking a human life, even with subtle rites and consent of the party involved is barbaric. No one can justly kill another human being. Just as it is wrong for a serial killer to murder, it is wrong for a physician to do so as well, no matter what the motive for doing so may be. Many thinkers, including almost all orthodox Catholics, believe that euthanasia is immoral. They oppose killing patients in any circumstances whatever. However, they think it is all right, in some special circumstances, to allow patients to die by withholding treatment The American Medical Association's policy statement on mercy killing supports this traditional view. In my paper "Active and Passive Euthanasia" I argue, against the traditional view, that there is in fact no normal difference between killing and letting die --if one is permissible, then so is the other. Professor Sullivan does not dispute my argument; instead he dismisses it as irrelevant The traditional doctrine, he says, does not appeal to or depend on the distinction between killing and letting die. Therefore, arguments against that distinction "leave the traditional position untouched". Is my argument really irrelevant? I don' t see how it can be. As Sullivan himself points out, nearly everyone holds that it is sometimes meaningless to prolong the process of dying and that in those cases it is morally permissible to let a patient die even though a few more hours or days could be saved by procedures that would also increase the agonies of the dying. But if' it is impossible to defend a general distinction between letting people die and acting to terminate their lives directly, then it would seem that active euthanasia also may be morally permissible. But traditionalists like professor Sullivan hold that active euthanasia--the direct killing of patients--is not morally permissible; so, if thy argument is sound, their view must ,be mistaken. I can not agree, then, that my argument "leave the traditional position untouched". However, I shall not press this point. Instead I shall present some further arguments against the traditional position, concentrating on those elements of the position which professor Sullivan himself thinks most important. According to him, what is important is, first, that we should never intentionally terminate the life of a patient, either by action or omission, and second, that we may cease or omit treatment of a patient, knowing that this will result in death, only if the means of treatment involved are extraordinary.