单选题The crisis in our industry was ______ by intense competition from foreign producers.

单选题{{B}}Directions: For each blank in the following passage, there are four choices marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.{{/B}} Mary Arming (1799—1847) was a British fossil hunter who began finding{{U}} (21) {{/U}}as a child, and soon supported herself and her very{{U}} (22) {{/U}}family by finding and selling fossils. Very{{U}} (23) {{/U}}is known about her life, but her father was a cabinet maker and he also{{U}} (24) {{/U}}local fossils. Mary{{U}} (25) {{/U}}on the southern coast of England, in a town called Lyme Regis. Its famous{{U}} (26) {{/U}}by the sea contain{{U}} (27) {{/U}}fossil layers that{{U}} (28) {{/U}}from the Triassic, Jurassic and Cretaceous periods (the{{U}} (29) {{/U}}of the dinosaurs, other bizarre reptiles, large insects, sea creatures,{{U}} (30) {{/U}}mammals, and{{U}} (31) {{/U}}life forms). Mary Arming{{U}} (32) {{/U}}and prepared the first fossilized plesiosaur (an ocean-dwelling reptile) and the first Ichthyosaurus (an ocean-dwelling reptile that{{U}} (33) {{/U}}like a dolphin). She found many other important fossils, including Pterodactylus (a flying reptile), sharks (and other fish), and so on.{{U}} (34) {{/U}}with her brother Joseph, Mary supplied prepared fossil specimens to{{U}} (35) {{/U}}museums, scientists, and private collections.

单选题- Mr. Smith, I wonder if you are free this afternoon. We" d like you to come to our party.

单选题Send the note to ______ is in the office. A. whoever B. whomever C. no matter who D. whichever

单选题How long ______ the concert ______? A．has; been lasted B．did; last C．will; be lasted D．was; lasted

单选题If it is left ______, this fast-spreading disease is likely to affect millions of Asian and African children, including more and more injured grown-ups. A. unchecked B. uncontrolled C. transmitted D. contaminated

单选题Mr. Smith gradually ______ a knowledge of the subject.

单选题The percentage of immigrants (including those unlawfully present) in the United States has been creeping upward for years. At 12.6 percent, it is now higher than at any point since the mid-1920s. We are not about to go back to the days when Congress openly worried about inferior races polluting America's bloodstream. But once again we are wondering whether we have too many of the wrong sort of newcomers. Their loudest critics argue that the new wave of immigrants cannot, and indeed do not want to, fit in as previous generations did. We now know that these racist views were wrong. In time, Italians, Romanians and members of other so-called inferior races became exemplary Americans and contributed greatly, in ways too numerous to detail, to the building of this magnificent nation. There is no reason why these new immigrants should not have the same success. Although children of Mexican immigrants do better, in terms of educational and professional attainment, than their parents, UCLA sociologist Edward Telles has found that the gains don't continue. Indeed, the fourth generation is marginally worse off than the third. James Jackson, of the University of Michigan, has found a similar trend among black Caribbean immigrants, Telles fears that Mexican-Americans may be fated to follow in the footsteps of American blacks—that large parts of the community may become mired (陷入) in a seemingly permanent state of poverty and underachievement. Like African-Americans, Mexican-Americans are increasingly relegated to(降入) segregated(隔离), substandard schools, and their dropout rate is the highest for any ethnic group in the country. We have learned much about the foolish idea of excluding people on the presumption of the ethnic/racial inferiority. But what we have not yet learned is how to make the process of Americanization work for all. I am not talking about requiring people to learn English or to adopt American ways; those things happen pretty much on their own. But as arguments about immigration heat up the campaign trail, we also ought to ask some broader questions about assimilation (同化), about how to ensure that people, once outsiders, don't forever remain marginalized within these shores. That is a much larger question than what should happen with undocumented workers, or how best to secure the border, and it is one that affects not only newcomers but groups that have been here for generations. It will have more impact on our future than where we decide to set the admissions bar for the latest wave of would-be Americans. And it would be nice if we finally got the answer right.

单选题The ______ action of the policemen saved the people in the house from being burnt. A. supreme B. significant C. prompt D. vital

单选题The American economic system is organized around a basically private-enterprise, market-oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most. Private businessmen, striving to make profits, produce these goods and services in competition with other businessmen; and the profit motive, operating under competitive pressures, largely determines how these goods and services are produced. Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes, that together determine what shall be produced and how resources are used to produce it. An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers. In the American economy, this mechanism is provided by a price system, a process in which prices rise and fall in response to relative demands of consumers and supplies offered by seller-producers. If the product is in short supply relative to the demand, the price will be bid up and some consumers will be eliminated from the market. If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit more consumers to buy the product. Thus, price is the regulating mechanism in the American economic system. The important factor in a private-enterprise economy is that individuals are allowed to own productive resources(private property), and they are permitted to hire labor, gain control over natural resources, and produce goods and services for sale at a profit. In the American economy, the concept of private property embraces not only the ownership of productive resources but also certain rights, including the right to determine the price of a product or to make a free contract with another private individual.

单选题______ for several times, Bill made up his mind not to play computer games at night any more. A. To be scolded B. To have been scolded C. Being scolded D. Having been scolded

单选题The illness had left her feeling tired and ______.A. strongB. happyC. weakD. hungry

单选题{{B}}Passage One{{/B}} Oceanography has been defined as "the application of all sciences to the study of the sea". Before the nineteen century, scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work. For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, let alone to ask what lay beneath the surface. The first time that question "What is at the bottom of the oceans?" had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed. The engineers had to know the depth profile of the route to estimate the length of cable that had to be manufactured. It was to Maury of the U.S. Navy that the Atlantic Telegraph Company turned, in 1853, for information on this matter. In the 1840s, Maury had been responsible for encouraging voyages during which soundings were taken to investigate the depths of the North Atlantic and Pacific Oceans. Later, some of his findings aroused much popular interest in his book The Physical Geography of the Sea. The cable was laid, but not until 1866 was the connection made permanent and reliable. At the early attempts, the cable failed and when it was taken out for repairs it was found to be covered in living growths, a fact which defied contemporary scientific opinion that there was no life in the deeper parts of the sea. Within a few years oceanography was under way. In 1872 Thomson led a scientific expedition, which lasted for four years and brought home thousands of samples from the sea. Their classification and analysis occupied scientists for years and led to a five-volume report, the last volume being published in 1895.

单选题The greatest advance that Librie has is that

单选题Inflation has surged in recent months due to double-digit spike in sensitive food prices blamed on shortages of pork and other basic goods. A. sharp rise C. dramatic drop B. regular increase D. anticipated decrease

单选题The company will ______to its agreement, no matter how costly the process may be.(2002年中国人民大学考博试题)

单选题Science is a dominant theme in our culture. Since it touches almost every facet of our life, educated People need at least some acquaintance with its structure and operation. They should also have an understanding of the subculture in which scientists live and the kinds of people they are. An understanding of general characteristics of science as well as specific scientific concepts is easier to attain if one knows something about the things that excite and frustrate the scientist. This book is written for the intelligent student or lay person whose acquaintance with science is superficial; for the person who has been presented with science as a musty store-house of dried facts; for the person who has been presented with science as the production of gadgets; and for the person who views the scientists as some sort of magician. The book can be used to supplement a course in any science, to accompany any course that attempts to give an understanding of the modern world, or, independently of any course--simply to provide a better understanding of science. We hope this book will lead readers to a broader perspective on scientific attitudes and a more realistic view of what science is, who scientists are, and what they do. It will give them an awareness and understanding of the relationship between science and our culture and an appreciation of the roles science may play in our culture. In addition, readers may learn to appreciate the relationship between scientific views and some of the values and philosophies that are pervasive in our culture. We have tried to present in this book an accurate and up-to-date picture of the scientific community and the people who populated it. That population has in recent years come to comprise more and more women. This increasing role of women in the scientific subculture is not an unique incident but, rather, part of the trend evident in all segments of society as more women enter traditionally male-dominated fields and make significant contributions. In discussing these changes and contributions, however, we are faced with a language that is implicitly sexist, one that uses male nouns or pronouns in referring to unspecified individuals. To offset this built-in bias, we have adopted the policy of using plural nouns and pronouns whenever possible and, when absolutely' necessary, alternating he and she. This policy is far from being ideal, but it is at least an acknowledgment of the inadequacy of our language in treating half of the human race equally. We have also tried to make the book entertaining as well as informative. Our approach is usually informal. We feel, as do many other scientists, that we shouldn't take ourselves too seriously. As the reader may observe, we see science as a delightful pastime rather than as a grim and dreary way to earn a living.