单选题Brushing removes larger particles, but dentists suggest brushing the back of the tongue as well, where food residues and bacteria ______. A. flourish B. collaborate C. embark D. congregate

单选题The discussion was so prolonged and exhausting that __________ the speakers stopped for deferments.

单选题The underlined word "ventures" in Paragraph 2 can best be replaced by ______.

单选题The strategy put forward in the passage implies that ______.

单选题European conservatives, until the end of the 19th century, rejected democratic principles and institutions. Instead they opted for monarchies or for authoritarian govern ment.

单选题Being color-blind, he can't make a ______ between red and green.

单选题Early exponents of science fiction such as Jules Verne and H. G. Wells explored with {{U}}zest{{/U}} the future possibilities opened up to the optimistic imagination by modem technology.

单选题{{B}}Ⅰ{{/B}}Each of the passages is followed by some questions. For each question four answers are given. Read the passages carefully and choose the best answer to each question Gene therapy and gene-based drugs are two ways we could benefit from our growing mastery of genetic science. But there will be others as well. Here is one of the remarkable therapies on the cutting edge of genetic research that could make their way into mainstream medicine in the coming years. While it's true that just about every cell in the body has the instructions to make a complete human, most of those instructions are inactivated, and with good reason r the last thing you want for your brain cells is to start churning out stomach acid or your nose to turn into a kidney. The only time cells truly have the potential to turn into any and all body parts is very early in a pregnancy, When so-called stem cells haven't begun to specialize. Yet this untapped potential could be a terrific boon to medicine. Most diseases involve the death of healthy cells-brain cells in Alzheimer's, cardiac cells in heart disease, pancreatic cells in diabetes, to name a few ff doctors could isolate stem cells, then direct their growth, they might be able to furnish patients with healthy replacement tissue. It was incredibly difficult, but last fall scientists at the University of Wisconsin managed to isolate stem cells and get them to grow into neural, gut, muscle and bone cells. The process still can't be controlled, and may have unforeseen limitations; but if efforts to understand and master stem-cell development prove successful, doctors will have a therapeutic tool of incredible power. The same applies to cloning, which is really just the other side of the coin; true cloning, as first shown with the sheep Dolly two years ago, involves taking a developed cell and reactivating the genome within, resetting its developmental instructions to a pristine state. Once that happens, the rejuvenated cell can develop into a full-fledged animal, genetically identical to its parent. For agriculture, in which purely physical characteristics like milk production in a cow or low fat in a hog have real market value, biological carbon copies could become routine within a few years. This past year scientists have done for mice and cows what Ian Wilmut did for Dolly, and other creatures are bound to join the cloned menagerie in the coming year. Human cloning, on the other hand, may be technically feasible but legally and emotionally more difficult. Still, one day it will happen. The ability to reset body cells to a pristine, undeveloped state could give doctors exactly the same advantages they would get from stem cells: the potential to make healthy body tissues of all sorts, and thus to cure disease. That could prove to be a true "miracle cure".

单选题And researchers say that like those literary romantics Romeo and Juliet, they may be blind to the consequences of their quests for an idealized mate who serves their every physical and emotional need. Nearly 19 in 20 never-married respondents to a national survey agree that "when you marry you want your spouse to be your soul mate, first and foremost." according to the State of Our Unions: 2001 study released Wednesday by Rutgers University. David Popenoe, a Rutgers sociologist and one of the study's authors, said that view might spell doom for marriages. "It really provides a very unrealistic view of what marriage really is." Popenoe said. "The standard becomes so high, it's not easy to bail out if you didn't find a soul mate." The survey points to a fundamental dilemma in which younger people want more from the institution of marriage while they seemingly axe unwilling to make the necessary commitments. The survey also suggests that some respondents expect too much from a spouse, including the kind of emotional support rendered by same-sex friends. The authors of the study also suggest that the generation that was polled may more quickly leave a margin because of infidelity than past generations. Popenoe said the poll, conducted by the Gallup Organization, is the first of its kind to concentrate on people in their 20s. A total of 1, 003 married and single young adults nationwide were interviewed by telephone between January and March. The margin of error was plus or minus four percentage points. Respondents said they eventually want to get married, realize it's a lot of work and think there are too many divorces. They believe there is one right person for them out there somewhere and think their own marriages won't end in divorce. Since the poll is the first of its kind, researchers say it is impossible to say if expectations about marriage are changing or static. But scholars say the search for soul mates has increased over the last generation—and the last century—as marriage has become an institution centering on romance rather than utility. "One hundred years ago, people married for financial reasons, for tying families together, they married for political reasons," said John DeLamater, a sociologist at the University of Wisconsin. "And most people had children." Those conditions are no longer the case for young adults like David Asher, a 24-year waiter in a Trenton caf6 who has been in a relationship for about two years. He wants to wait to make sure he's ready to exchange vows. "I know a lot of it has to do with financial reasons," he said. "Maybe if you're going to have children, marriage is the best bet." But the main reason for matrimony: "If you're in love with someone, it's sort of like promising to them you are in love." That's all well and good, said Heather Helms-Erikson, an assistant professor of human development and family studies at the University of North Carolina at Greensboro, but passion—partly in endorpincaused physiological phenomenon—has been known to diminish in time.

单选题Justice in society must include both a fair trial to the accused and the selection of an appropriate punishment for those proven guilty. Because justice is regarded as one form of equality, we find in its earlier expressions the idea of a punishment equal to the crime. Recorded in the Bible is the expression "an eye for an eye, and a tooth for a tooth." That is, the individual who has done wrong has committed an offense against society. To make repayment for this offense, society must get equally balanced, which can be done only by imposing an equal injury upon him. This conception of deserved-punishment justice is reflected in many parts of the legal codes and procedures of modern times, which is illustrated when we demand the death penalty for a person who has committed murder. This philosophy of punishment was supported by the German idealist Hegel, who believed that society owed it to the criminal to put into operation a punishment equal to the crime he had committed. The criminal had by his own actions denied his true self and it is necessary to do something that will eliminate this denial and restore the self that has been denied. To the murderer nothing less than giving up his life will pay his debt The demand for the death penalty is a right the state owes the criminal and it should not deny him what he deserves. Modern jurists have tried to replace deserved-punishment justice with the notion of corrective justice. The aim of the latter is not to abandon the concept of equality but to find a more adequate way to express it. It tries to preserve the idea of equal opportunity for each individual to realize the best that is in him. This does not mean that criminals will escape punishment or be quickly returned to take up careers of crime. It means that justice is to heal the individual, not simply to get even with him. Therefore, his conviction of crime must not deprive him of the opportunity to make his way in the society of which he is a part.

单选题Because it is tuned a fifth lower, the viola produces a sound that is Umore resonant/U than that of the violin.

单选题Today's scientists are no longer constrained simply by the laws of nature, ______ in the past, but also by the laws (and attitudes) of the land.

单选题4 Publication of this survey had originally been intended to coincide with the annual meetings of the World Bank and the International Monetary Fund, scheduled for Septem ber 29th-30th in Washington, D.C. Those meetings, and the big anti-globalization pro tests that had been planned to accompany them, were among the least significant casualties of the terrorist atrocities of September 11th. You might have thought that the anti-capitalist protesters, after contemplating those horrors and their aftermath, would be regretting more than just the loss of a venue for their marches. Many are, no doubt. But judging by the response of some of their leaders and many of the activists ( if Internet chat rooms are any guide), grief is not always the prevailing mood. Some anti-globalists have found a kind of consolation even a cause of satis faction, in these terrible events--that of having been as they see it, proved right. To its fiercest critics, globalization, the march of international capitalism, is a force for oppression, exploitation and injustice. The rage that drove the terrorists to commit their obscene crime was in part, it is argued, a response to that. At the very least, it is suggested, terrorism thrives on poverty and international capitalism, the protesters say, thrives on poverty too. These may be extreme positions, but the minority that holds them is not tiny, by any means. Far more important, the anti-globalists have lately drawn tacit support if nothing else, reluctance to condemn—from a broad range of public opinion. As a result, they have been, and are likely to remain, politically influential. At a time such as this, sorting through issues of political economy may seem very far removed from what matters. In one sense, it is. But when many in the West are contemplating their future with new forebod ing, it is important to understand why the skeptics are wrong; why economic integration is a force for good; and why globalization, far from being the greatest cause of poverty, is its only feasible cure. Undeniably, popular support for that view is lacking. In the developed economies, support for further trade liberalization is uncertain; in some countries, voters are down right hostile to it. Starting a new round of global trade talks this year will be struggle, and seeing it through to a useful conclusion will be. The institutions that in most people's eyes represent the global economy—the IMF, the World Bank and the World Trade Organiza tion are reviled far more widely than they are admired; the best they can expect from opin ion at large is grudging acceptance. Governments, meanwhile, are accused of bowing down to business: globalization leaves them no choice. Private capital moves across the planet unchecked. Wherever it goes, it bleeds democracy of content and puts "profits be fore people".

单选题Feminist critics have long debated the extent to which gender plays a role in the creation and interpretation of texts. Androgynist poetics, rooted in mid-Victorian women"s writing, contends that the creative mind is sexless, but from the 1970s on, many feminist critics rejected the idea of the genderless, mind, finding that the imagination cannot evade conscious or unconscious structures of gender which is part of culture-determination where separating imagination from the self is impossible. The Female Aesthetic, expressing a unique female consciousness in literature, spoke of the "female vernacular, the Mother Tongue, a powerful but neglected women"s culture." Virginia Woolf discusses how a woman writer seeks within herself "the pools, the depths, the dark places where the largest fish slumber," inevitably colliding against her own sexuality to confront "something about the body, about the passions." Accessible to men and women alike, but representing female sexual morphology, this method sought a way of writing which literally embodied the female, thereby fighting the subordinating, linear style of classification or distinction. It must be admitted that there are problems with the Female Aesthetic that feminist critics themselves recognized. For instance; they avoided defining exactly what constituted their writing style, as any definition would then categorize it and safely subsume it as a genre under the linear patriarchal structure—its very restlessness and ambiguity defied identification as part of its identity. Some feminists and women writers could feel excluded by the surreality of the Female Aesthetic and its stress on the biological forms of female experience, which also bear close resemblance to essentialism. Men may try their hand at writing woman"s bodies, but according to the feminist critique, only a woman whose very biology gave her an edge could read these texts successfully—a position which, worst of all, risked marginalization of women"s literature and theory. Later, Gynocritics attempted to resolve some of these problems, by agreeing that women"s literature lay as the central concern for feminist criticism but rejecting the concept of an essential female identity and style, while simultaneously seeking to revise. Freudian structures by emphasizing a Pre-Oedipal phase wherein the daughter"s bond to her mother inscribes the key factor in gender identity. Matriarchal values dissolve intergenerational conflicts and build upon a female tradition of literature rather than the struggle of Oedipus and Lais at the crossroads. Lastly and most promising in its achievement of a delicate balance are developments of an over-arching gender theory, which considers gender, both male and female, as a social construction built on biological differences. Gender theory proposes to explore ideological inscription and the literary effects of the sex/gender system, opening up the literary theory stage and bringing in questions of masculinity into feminist theory. Taking gender as a fundamental analytic category brings feminist criticism from the margin to the center, though it risks depoliticizing the study of women.

单选题To compensate for the substantial decline in the availability of fossil fuels in future years, we will have to provide at least ______ alternative energy source.

单选题The primary objective of Basic Econometrics is to provide an elementary but a {{U}}comprehensive{{/U}} introduction to the art and science of econometrics.

单选题Unfortunately not all of us obtain our just______in this life.