单选题Financial consultants acknowledge that the value of common stock is {{U}}inherently{{/U}} changeable.

单选题The new job will provide you with invaluable experience. A. simply useless B. really practical C. very little D. extremely useful

单选题In the latter case the outcome can be serious indeed.

单选题下面有3篇短文，每篇短文后有5道题，每道题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案。{{B}}第一篇{{/B}} "Salty" Rice Plant Boosts Harvests British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more. Tim Flowers and Tony Yeo, from Sussex University's School of Biological Sciences, have spent several years researching how crops, such as rice, could be made to grow in water that has become salty. The pair have recently begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops, starting with rice. It is estimated that each year more than 10m hectares(公顷) of agricultural land are lost because salt gets into the soil and stunts(妨碍生长) plants. The problem is caused by several factors. In the tropics, mangroves(红树林) that create swamps(沼泽) and traditionally formed barriers to sea water have been cut down. In the Mediterranean, a series of droughts have caused the water table to drop, allowing sea water to seep(渗透) in. In Latin America, irrigation often causes problems when water is evaporated(蒸发) by the heat, leaving salt deposits behind. Excess salt then enters the plants and prevents them functioning normally. Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive. To overcome these problems, Flowers and Yeo decided to breed rice plants that take in very little slat and store what they do absorb in cells that do not affect the plants' growth. They have started to breed these characteristics into a new rice crop, but it will take about eight harvests before the resulting seeds are ready to be considered for commercial use. Once the characteristics for surviving salty soil are known, Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants. Land that has been abandoned to nature will then be able to bloom again, providing much needed food in the poorer countries of the world.

单选题There are only five minutes left, but the outcome of the match is still in doubt.

单选题 The Population Situation in India With 950 million people, India ranks second to China among the most populous countries. But since China {{U}} {{U}} 1 {{/U}} {{/U}}a family planning program in 1971, India has been closing the gap. Indians have reduced their birth rate but not nearly {{U}} {{U}} 2 {{/U}} {{/U}}the Chinese have. If current growth rates continue, India's population will {{U}} {{U}} 3 {{/U}} {{/U}}China's around the year 2028 at about 1.7 billion. Should that happen, it won't be the {{U}} {{U}} 4 {{/U}} {{/U}}of the enlightened women of Kerala, a state in southern India. While India as a whole adds almost 20 million people a year, Kerala's population is virtually {{U}} {{U}} 5 {{/U}} {{/U}}. The reason is no mystery: nearly two-thirds of Kerala women practice birth control, {{U}} {{U}} 6 {{/U}} {{/U}}about 40% in the entire nation. The difference {{U}} {{U}} 7 {{/U}} {{/U}}the emphasis put on health programs, including birth control, by the state authorities, {{U}} {{U}} 8 {{/U}} {{/U}}in 1957 became India's first elected Communist government. And an educational tradition and matrilineal (母系的) customs in parts of Kerala help girls and boys get {{U}} {{U}} 9 {{/U}} {{/U}}good schooling. While one in three Indian women is {{U}} {{U}} 10 {{/U}} {{/U}}, 90% of those in Kerala can read and write. Higher literacy rates {{U}} {{U}} 11 {{/U}} {{/U}}family planning. "Unlike our parents, we know that we can do more for our children if we have {{U}} {{U}} 12 {{/U}} {{/U}}of them," says Laial Cherian, 33, who lives in the village of Kudamaloor. She has limited herself {{U}} {{U}} 13 {{/U}} {{/U}}three children-one below the national {{U}} {{U}} 14 {{/U}} {{/U}}of four. That kind of restraint (抑制，克制) will keep Kerala from putting added {{U}} {{U}} 15 {{/U}} {{/U}}on world food supplies.

单选题Their parents once lived under very severe conditions.

单选题The first step in planning a marketing strategy for a new product is to analyze the breakdown of sales figures for competitive products.

单选题He believes that Europe must change or it will {{U}}perish{{/U}}. A. survive B. last C. die D. move

单选题Communication satellites generally use solar cells as their source of electric power, although some test satellites have used thermoelectric generators.

单选题Dennis Muren started his schooling at a very early age.

单选题Why So Many Children In many of the developing countries in Africa and Asia, the population is growing fast. The reason for this is simple: Women in these countries have a high birth rate—from 3.0 to 7.0 children per woman. The majority of these women are poor, without the food or resources to care for their families. Why do they have so many children? Why don"t they limit the size of their families? The answer may be that they often have no choice. There are several reasons for this. One reason is economic. In a traditional agricultural economy, large families are helpful. Having more children means having more workers in the fields and someone to take care of the parents in old age. In an industrial economy, the situation is different. Many children do not help a family; instead, they are an expense. Thus, industrialization has generally brought down the birth rate. This was the case in Italy, which was industrialized quite recently and rapidly. In the early part of the twentieth century, Italy was a poor, largely agricultural country with a high birth rate. After World War Ⅱ, Italy"s economy was rapidly modernized and industrialized. By the end of the century, the birth rate had dropped to 1.3 children per woman, the world"s lowest. However, the economy is not the only important factor that influences birth rate. Saudi Arabia, for example, does not have an agriculture-based economy, and it has one of the highest per capita incomes in the world. Nevertheless, it also has a very high birth rate (7.0). Mexico and Indonesia, on the other hand, are poor countries, with largely agricultural economies, but they have recently reduced their population growth. Clearly, other factors are involved. The most important of these is the condition of women. A high birth rate almost always goes together with lack of education and low status for women. This would explain the high birth rate of Saudi Arabia. There, the traditional culture gives women little education or independence and few possibilities outside the home. On the other hand, the improved condition of women in Mexico, Thailand, and Indonesia explains the decline in birth rates in these countries. Their governments have taken measures to provide more education and opportunities for women. Another key factor in the birth rate is birth control. Women may want to limit their families but have no way to do so. In countries where governments have made birth control easily available and inexpensive, birth rates have gone down. This is the case in Singapore, Sri Lanka, and India, as well as in Indonesia, Thailand, Mexico, and Brazil. In these countries, women have also been provided with health care and help in planning their families. These trends show that an effective program to reduce population growth does not have to depend on better economic conditions. It can be effective if it aims to help women and meet their needs. Only then, in fact, does it have any real chance of success.

单选题Human Ingenuity Since the dawn of human ingenuity, people have devised ever more cunning tools to cope with work that is dangerous, boring, burdensome, or just plain nasty. That compulsion has resulted in robotics—the science of conferring various human capabilities on machines. And if scientists have yet to create the mechanical version of science fiction, they have begun to come close. As a result, the modern world is increasingly populated by intelligent gizmos whose presence we barely notice but whose universal existence has removed much human labor. Our factories hum to the rhythm of robot assembly arms. Our banking is done at automated teller terminals that thank us with mechanical politeness for the transaction. Our subway trains are controlled by tireless robo-drivers. And thanks to the continual miniaturization of electronics and micro-mechanics, there are already robot systems that can perform some kinds of brain and bone surgery with submillimeter accuracy—far greater precision that highly skilled physicians can achieve with their hands alone. But if robots are to reach the next stage of laborsaving utility, they will have to operate with less human supervision and be able to make at least a few decisions for themselves—goals that pose a real challenge. "While we know how to tell a robot to handle a specific error," says Dave Lavery, manager of a robotics program at NASA, "we can"t yet give a robot enough "common sense" to reliably interact with a dynamic world." Indeed the quest for true artificial intelligence has produced very mixed results. Despite a spell of initial optimism in the 1960s and 1970s when it appeared that transistor circuits and microprocessors might be able to copy the action of the human brain by the year 2010, researchers lately have begun to extend that forecast by decades if not centuries. What they found, in attempting to model thought, is that the human brain"s roughly one hundred billion nerve cells are much more talented—and human perception far more complicated-than previously imagined. They have built robots that can recognize the error of a machine panel by a fraction of a millimeter in a controlled factory environment. But the human mind can glimpse a rapidly changing scene and immediately disregard the 98 percent that is irrelevant, instantaneously focusing on the monkey at the side of winding forest road or the single suspicious face in a big crowd. The most advanced computer systems on Earth can"t approach that kind of ability, and neuroscientists still don"t know quite how we do it.

单选题There are only five minutes left, but the {{U}}outcome{{/U}} of the match is still in doubt. A. result B. judgement C. estimation D. event

单选题Many economists have given in to the fatal lure of mathematics.

单选题What Is Globalization? It was the anti-globalization movement that really put globalization on the map. As a word it has existed since the 1960s, but the protests against this allegedly new process, which its opponents condemn as a way of ordering people"s lives, brought globalization out of the financial and academic worlds and into everyday current affairs. In the late 1980s and early 1990s, the business model called the "globalized" financial market came to be seen as an entity that could have more than just an economic impact on the parts of the world it touched. Globalization came to be seen as more than simply a way of doing business, or running financial markets—it became a process. From then on the world took on a life of its own. So how does the globalized market work? It is modern communications that make it possible; for the British service sector to deal with its customers through a call centre in India, or for a sportswear (运动服) manufacturer to design its products in Europe, make them in Southeast Asia and sell them in North America. But this is where the anti-globalization side gets stuck in (关注). If these practices replace domestic economic life with an economy that is heavily influenced or controlled from overseas. Then the creation of a globalized economic model and the process of globalization can also be seen as a surrender of power to the corporations, or a means of keeping poorer nations in their place. Not everyone agrees that globalization is necessarily evil, or that globalized corporations are running the lives of individuals or are more powerful than nations. Some say that the spread of globalization, free markets and free trade into the developing world is the best way to beat poverty—the only problem is that free markets and free trade do not yet truly exist. Globalization can be seen as a positive, negative or even marginal process. And regardless of whether it works for good or ill, globalization"s exact meaning will continue to be the subject of debate among those who oppose, support or simply observe it.

单选题The book made a great impact on its readers.

单选题Right and Wrong Suppose you work in a library, checking people's books as they leave, and a friend asks you to let him steal a hard-to-find reference book that he wants to own. You might hesitate to agree for various reasons. You might be afraid that he'll be caught, and that both you and he will then get into trouble. You might want the book to stay in the library so that you can read it yourself. But you may also think that what he proposes is wrong--that he shouldn't do it and you shouldn't help him. If you think that, what does it mean and what, if anything, makes it true? To say it's wrong is not just to say it's against the rules. There can be bad rules which stop what isn't wrong--like a company rule against criticizing the boss. A rule can also be bad because it requires something that is wrong--like a law that looks down upon black people in hotels and restaurants. The ideas of wrong and right are different from the ideas of what is and is not against the rules. If you think it would be wrong to help your friend steal the book, then you will feel uncomfortable about doing it: in some way you won't want to do it, even if you are also unwilling to refuse to help a friend. Where does the desire not to do it come from? What is its motive behind it? There are various ways in which something can be wrong, but in this case, if you had to explain it, you'd probably say that it would be unfair to other users of the library. They may be just as interested in the book as your friend is, but read it in the reference room, where anyone who needs it can fred it. These thoughts have to deal with effects on others--not necessarily effects on their feelings, since they may never find out about it, but some kind of damage. In general, the thought that something is wrong depends on its impact not just on the person who does it but on other people.

单选题The director often says it is difficult to design a program that will meet the diverse needs of all our users.A. vailousB. differentC. versatileD. distinguished

单选题阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 {{B}} International Trade{{/B}} Since the end of World War Ⅱ, international trade has developed dramatically. All countries in the modern world join in worldwide trade, through which various sorts of merchandise and{{U}} (51) {{/U}}materials are exported in{{U}} (52) {{/U}}for foreign currency, which means income wealth from{{U}} (53) {{/U}}and job opportunity at home, and in the meantime, foreign goods are imported to provide consumers with{{U}} (54) {{/U}}and welcome merchandise. Today, economic interdependence among countries is so{{U}} (55) {{/U}}that no country can close its doors to the outside world, and the more prosperous the national economy, the more developed the foreign trade. Economic globalization is now a{{U}} (56) {{/U}}in the world. But in the past when old and new colonialism ruled the world there was no free and fair trade at all. Powers,{{U}} (57) {{/U}}the British empire, the United States, Russia, Japan, divided the world into their spheres of influence—their colonies or dependencies, where their businessmen{{U}} (58) {{/U}}their merchandise at high prices and bought{{U}} (59) {{/U}}raw materials and labor at low prices.{{U}} (60) {{/U}}of wealth flowed to these powers which then grew prosperous,{{U}} (61) {{/U}}the colonies were driven into destitution (贫困). The national economy of colonies was innately defective. Their industries could not survive the overwhelming{{U}} (62) {{/U}}of imports from the powers. Their monotonous national economy{{U}} (63) {{/U}}in production of one or two agricultural crops or{{U}} (64) {{/U}}products or minerals, to be sold in international market, for example, orange and sugarcane in Cuba, banana and coffee in South America, coal in Poland, all{{U}} (65) {{/U}}to supply-demand relation in world market under control of the powers. Even their customs were governed by officials from the powers, whose exported goods thus could enter the colonies nearly duty-free. It was after the collapse of colonialist system all over the world that free and fair international trade, at least theoretically, could be possible.