单选题You are not allowed to take a second job ______ your employer gives you permission.

单选题Realizing that many readers find long descriptive passages Uuninteresting/U, Bruce began his story with an exciting conflict.

单选题{{B}}Directions:{{/B}} There are 15 questions in this part of the test. Read the passage through. Then, go back and choose one suitable word or phrase marked A, B, C or D for each blank in the passage. Mark the corresponding letter of the word or phrase you have chosen with a single bar across the square brackets on your Machine-scoring Answer Sheet. Acid rain leads to fish mortality. Many species of fish cannot survive in aquatic environments where the pH is below 5.0. If the water is too acid, the gill systems of many kinds of fish can be damaged.{{U}} (21) {{/U}}, the acid alters the blood chemistry of all fish. As a result, the fish population in an acidic environment decreases{{U}} (22) {{/U}}becomes extinct.Approximately 20 percent of the lakes in Scandinavia are without fish. Moreover, in Nova Scotia the{{U}} (23) {{/U}}salmon industry may be threatened by the decrease of salmon in rivers and streams. The impact is also{{U}} (24) {{/U}}in the waters of Ontario and Quebec, where fish populations are (25) the decline. What potential remedies exist for the acid rain{{U}} (26) {{/U}}? The experts disagree. Some say new environmental laws should be{{U}} (27) {{/U}}to control the emission of pollutants in the atmosphere. Some say that if we had known how serious acid rain was, we would have planned{{U}} (28) {{/U}}to prevent it.{{U}} (29) {{/U}}, all agree that if the consumption of fossil fuel were reduced, we would have less of a problem. Another{{U}} (30) {{/U}}is that special scrubbers could be installed in smokestacks to remove a good{{U}} (31) {{/U}}of the pollutants before they get into the atmosphere. Other ideas even include breeding more{{U}} (32) {{/U}}fish. And research suggests that spreading lime into lakes may be effective in{{U}} (33) {{/U}}acidity. In conclusion, it is clear that if we truly want to reduce the impact of acid rain, a{{U}} (34) {{/U}}of remedies and international cooperation must be explored. It is a sad fact that acid rain probably could have been avoided if we{{U}} (35) {{/U}}what we know now.

单选题2 Oxford and Cambridge University Boat Clubs have both taken the opportunity to trav el to Spain this month to train in less testing weather conditions than those which have, quite literally, already blown around the UK in January of 2007. Each group of athletes has been focused on training to the maximum, working on technique and molding themselves into two potential fighting units per Club for the 2007 Boat Race, sponsored by Xchanging. One set will be in the Blue Boat for each club and one set will race as reserves in Isis, for Oxford, and Goldie, for Cambridge. In these modern times, the Head Coach for each club has a huge input on selection even though the crew is still named by the President. Just twenty years ago the balance was not quite the same. The year 1987 will always be remembered in the history of this great Race as the year of the "mutiny" at Oxford. It is a tale which has since been retold and reworked in both a book and a movie. This was the season for which mature Scottish student, Donald MacDonald, was elected President, having all ready won a Blue in 1986. MacDonald re-appointed Daniel Topolski (now a renowned rowing journalist and broadcaster) as Chief Coach. Part of the 1986/1987 squad at Oxford included American Chris Clark, now a coach at an American University, and four fellow US internationals. Allegedly, a split appeared in the squad between the American quintet, all experienced and leading oarsmen, and those rowers closest to MacDonald. The Scot's group were happy to follow Topolski's regime whilst the others were not so sure. Following a contentious seat racing trial in January of 1987, Topolski decided to move Clark to the bow-side of the beat. Clark disagreed. Topolski held firm. As a result Clark and his "group" within the squad decided not to row and sought a takeover. The squabble was played out extensively in the UK national media and caught the pub lic imagination. MacDonald sought support from the college captains and eventually won a vote of confidence by 28 votes to 11. Without the Americans, the Oxford crew was immediately considered a lost cause. Cambridge were overwhelming favorites to win. As it turned out, though, this was a Race which would prove why sport, and partic ularly The Boat Race, can be so fascinating.

单选题______ spending can lead to bankruptcy.

单选题Before the mid-nineteenth century, people in the United States ate most foods only in season. Drying, smoking, and salting could preserve meat for a short time, but the availability of fresh meat, like that of fresh milk, was very limited, there was no way to prevent spoilage, But in 1810 a French inventor named Nicolas Appert developed the cooking-and-sealing process of canning. And in the 1850's an American named Gail Borden developed a means of condensing and preserving milk. Canned goods and condensed milk became more common during the 1860's, but supplies remained low because cans had to be made by hand. By 1880, however, inventors had fashioned stamping and soldering machines that mass-produced cans from tinplate. Suddenly all kinds of food could be preserved and bought at all times of the year. Other trends and inventions had also helped make it possible for Americans to vary their daily diet. Growing urban populations created demand that encouraged fruit and vegetable farmers to raise more produce. Railroad refrigerator cars enabled growers and meat packers to ship perishables great distances and to preserve them for longer periods. Thus, by the 1890's, northern city dwellers could enjoy southern and western strawberries, grapes, and tomatoes, previously available for a month at most, for up to six months of the year. In addition, increased use of iceboxes enabled families to store perishables. All easy means of producing ice commercially had been invented in the 1870's, and by 1900 the nation had more than two thousand commercial ice plants, most of which made home deliveries. The icebox became a fixture in most homes and remained so until the mechanized refrigerator replaced it in the 1920's and 1930's.

单选题I should be able to finish the task on time, ______ you provide me with the necessary guidance.

单选题 Then felt like some watcher of the skies When a new planet swims into his ken, Or like stout Cortez, when with eagle eyes He stared at the Pacific--and all his men Looked at each other with a wild surmise-- Silent, upon a peak in Darien. --Keats With these well-loved lines John Keats recognized the most important geographical event in all the world, excepting only the feat of the Admiral Columbus himself. It was the discovery by European men of a vast sheet of water covering nearly 40 per cent of the globe--the ocean later to be named Pacific by Ferdinand Magellan because of its seeming tranquility. It is too bad that Keats' beautiful lines erred in naming stout Cortez instead of the equally stout Balboa, a hero of much courage and perseverance. Too bad it was, too, for the immortal Vasco Nunez de Balboa, that communications in his day were so slow and uncertain. Had they been better he might well have avoided losing his head for his pains in bringing renown to Spain and incalculable new knowledge to the civilized world. For lose it he did, under the axe at the insance of a jealous governor.

单选题1 tried very hard to persuade her to join our study group but I met with flat______.

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 storehouse 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 populate 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 a 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 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.

单选题After 1945 both America scholarship and a resurgence of Marxist thought increasingly penetrated European sociology, which expanded considerably. To a growing extent in both the United States and Western Europe, the three dominating figures of Marx, Durkheim, and Weber was recognized as the preeminent classical thinkers of the sociological tradition. Their work continued to influence contemporary sociologists.

单选题The United Nations Population Fund has picked October 31 as the day the world will be home to 7 billion people. For better and worse, it's a milestone. And there will be more milestones ahead. Fourteen years from now, there are expected to be 8 billion people on the planet. Most of the growth will occur in the world's poorer countries. Proportionally, Europe's population will decline, while Africa's will increase. At around the same time, India will overtake China as the most populous nation on Earth. The growing global population is just one side of the coin. A recent report from the World Health Organization signaled the seriousness of the human population explosion: more than 3 billion people—about half the world's population—are malnourished. Never before have so many, or such a large proportion, of the world's people been malnourished. And in a growing number of countries, there is a seemingly unstoppable march toward sub-replacement fertility, whereby each new generation is less populous than the previous one, and population aging. As a result of declining fertility and increasing longevity, the populations of more and more countries are aging rapidly. Between 9,005 and 2050, a rise in the population aged 60 years or over will be visible, whereas the number of children (persons under age 15) will decline slightly. Population aging represents, in one sense, a success story for mankind, but it also poses profound challenges to public institutions that must adapt to a changing age structure. The latest national census in China shows the number of elderly people in the country has jumped to more than 13.3 percent of the population, an increase of nearly 3 percentage points on the percentage from the previous census in 2000. A quarter of the country's population will be over 65 by 2050, according to the National Population and Family Planning Commission. The growing number of elderly is a challenge that the government needs to tackle, we can't rely on the ever-increasing population to support them or maintain the nation's economic growth. Better solutions are needed, such as raising retirement ages to reflect the greater longevity and working capability of today's older adults and making adjustments so pension programs are more accessible. It was heartening to hear the Ministry of Human Resources and Social Security spokesperson announced in Beijing on Tuesday that the government will take the retirement policy seriously and proactively. Shanghai began testing a flexible retirement system last October. Eligible employees in the private sector are allowed to postpone retirement until the age of 65 for women. Public servants, however, will continue to retire under the present system—age 60 for men and 55 for women.

单选题Sometimes the imprudence ______ some policy-makers results in heavy losses to the national interests.

单选题A trip to the Antarctic is {{U}}reasonably{{/U}} safe if you take the necessary precautions.

单选题In order to work here the foreigner needs a work permit, which must be【C1】______for by his prospective employer. The problem here is that the Department of Employment has the right to【C2】______or refuse these permits, and there is little that can be【C3】______about it, it would be extremely unwise【C4】______a foreign visitor to work without a permit, since anyone doing so is【C5】______to immediate deportation. There are some【C6】______to this rule, most notably people from the Common Market countries, who are【C7】______to work without permits and who are often given【C8】______residence permits of up to five years. Some【C9】______people, such as doctors, foreign journalists, authors and others, can work without【C10】______. The problem with the Act is not just that some of its rules are【C11】______but【C12】______it is administered, and the people who administer it. An immigration official has the power to stop a visitor【C13】______these shores coming into the country. If this happens the visitor has the【C14】______to appeal to the Immigration Appeal Tribunal.【C15】______the appeals are being considered, the visitor has no choice but to wait sometimes for quite a long time.

单选题Like many of my generation, I have a weakness for hero worship. At some point, however, we all to question our heroes and our need for them. This leads us to ask: What is a hero? Despite immense differences in cultures, heroes around the world generally share a number of characteristics that instruct and inspire people. A hero does something worth talking about. A hero has a story of adventure to tell and community who will listen. But a hew floes beyond mere fame. Heroes serve powers or principles larger than themselves. Like high-voltage transformers, heroes take the energy of higher powers and step it down so that it can be used by ordinary people. The hero lives a life worthy of imitation. Those who imitate a genuine, they experience life with new depth, enthusiasm, and meaning. A sure test for would-be heroes is what or whom do they serve? What are they willing to live and die for? The answer or evidence suggests they serve only their own fame, they may be famous persons but not heroes. Madonna and Michael Jackson are famous, but who would claim that their fans find life more abundant? Heroes are catalysts (催化剂) for change. They have a vision from the mountaintop. They have the skill and the charm to move the masses. They create new possibilities. Without Gandhi, India might still be part of the British Empire. Without Rosa Parks and Martin Luther King, Jr. , we might still have segregated (隔离的) buses, restaurants, and parks: It may be possible for largescale change to occur without leaders with magnetic personalities, but the pace of change would be slow, the vision uncertain, and the committee meetings endless.

单选题She had a shy, retiring side to her personality that was completely at odds with her public______.

单选题Are you going to attend Prof. Barker's______on Brain Electronics tomorrow?