单选题I ______ ping-pong quite well, but I haven't had time to play since the new year.A. will playB. have playedC. playedD. play

单选题Most of the illusions that defined the tate global economic boom—the notion that global growth had moved to a non-stop higher plane and housing prices from Miami to Mumbai would rise indefinitely—are now indeed exhausted. Yet one idea still has the power to capture imaginations and markets: it is that commodities like oil, copper, grains and gold are all destined to rise over time. Lots of smart people believe that last year's increase in commodities prices represented a pause in a long-term bull market. It's view rooted in powerful and real trends, like the growth of India, the decline in global reserves, fears over resource nationalization and long-term lack of investment in energy and agriculture, which limits supply. At any point in time, there are always new economic powers emerging on the global scene, yet product prices have continued to fall. The 1980s and 1990s were a relatively strong period for the global economy, and India was growing at an average pace of 7 percent. But prices for most commodities did not follow, oil, for example, never broke through the upper limit of $40 a barrel. The reason oil prices did not spike higher is simple: demand for any product is price-elastic, which means that once the price goes too high, consumers stop buying it or make heroic efforts to find a substitute. There is good reason to believe that the world just passed a similar turning point. The last boom in the oil prices collapsed in 1979, when total spending on oil exceeded 7 percent of global GDP. Last year, spending on oil hit a similar share of global GDP, and the price has since fallen by more than two thirds. Yet markets are still betting that the price of oil is poised to spike again. Some analysts predict $90 a barrel by 2012. It's worth noting that until as recently as 2005, the markets acted on the exact opposite assumption. For years, sport prices ran much higher than futures prices, because most investors assumed prices would follow the historic trend line: down. Today investors are sill reacting to any sign of health in the global economy by pouring money back into commodities, producing the unstable upward price swing we've seen in recent weeks.

单选题Long time ago, the ancient people could not travel to any far away places for they had no vehicle to carry them across the wide oceans, deep valleys, long rivers or high mountains. Nowadays people take advantage of steamships, trains, airplanes and modern bridges. Airplanes can carry us to the far countries in a short time; steamships can travel across the wide oceans. It is convenient to the modern people. Travelling is a good idea to us because we can get more knowledge, such as the customs, the geography of other countries. And people could travel among the different countries in the world. For it is easy to travel from the land by trains, or from the sea by ships. We learnt that the Italian who made the world large was Mr. Columbus. He was a brave man. Up to the middle of the 15th century, the people were afraid of traveling because they believed it was a dangerous thing. There is a saying in China, which is "Travelling for thousands is better than reading for ten years." It is to say that we can learn more in different places than we can learn from books.

单选题The human Y chromosome—the DNA chunk that makes a man a man—has lost so many genes over evolutionary time that some scientists have suspected it might disappear in 10 million years. But a new study says it'll stick around. Researchers found no sign of gene loss over the past 6 million years, suggesting the chromosome is "doing a pretty good job of maintaining itself," said researcher David Page of the Whitehead Institute for Biomedical Research in Cambridge, Mass. That agrees with prior mathematical calculations that suggested the rate of gene loss would slow as the chromosome evolved, Page and study co-authors note in Thursday's issue of the journal Nature. And, they say, it clashes with what Page called the "imminent demise" idea that says the Y chromosome is doomed to extinction. The Y appeared 300 million years ago and has since eroded into a dinky chromosome, because it lacks the mechanism other chromosomes have to get rid of damaged DNA. So mutations have disabled hundreds of its original genes, causing them to be shed as useless. The Y now contains only 27 genes or families of virtually identical genes. In 2003, Page reported that the modern-day Y has an unusual mechanism to fix about half of its genes and protect them from disappearing. But he said some scientists disagreed with his conclusion. The new paper focuses on a region of the Y chromosome where genes can't be fixed that way. Researchers compared the human and chimpanzee versions of this region. Humans and chimps have been evolving separately for about 6 million years, so scientists reasoned that the comparisons would reveal genes that have become disabled in one species or the other during that time. They found five such genes on the chimp chromosome, but none on the human chromosome, an imbalance Page called surprising. "It looks like there has been little if any gene loss in our own species lineage in the last 6 million years," Page said. That contradicts the idea that the human Y chromosome has continued to lose genes so fast it'll disappear in 10 million years, he said. "I think we can with confidence dismiss … the 'imminent demise' theory," Page said. Jennifer A. Marshall Graves of the Australian National University in Canberra, a gene researcher who argues for eventual extinction of the Y chromosome, called Page's work "beautiful" but said it didn't shake her conviction that the Y is doomed. The only real question is when, not if, the Y chromosome disappears, she said. "It could be a lot shorter than 10 million years, but it could be a lot longer," she said. The Y chromosome has already disappeared in some other animals, and "there's no reason to expect it can't happen to humans," she said. If it happened in people, some other chromosome would probably take over the sex-determining role of the Y, she said.

单选题Some people do not like anything to be out of place; they are never late for work; they return their books on time to the library; they remember people"s birthdays; and they pay their bills as soon as they arrive. Mr. Hill is such a man. Mr. Hill works in a bank, and lives alone. The only family he has is in the next town: his sister lives there with her husband, and her son, Jack. Mr. Hill does not see his sister, or her family, from one year to the next, but he sends them Christmas cards, and he has not forgotten one of Jack"s seventeen birthdays. Last week Mr. Hill had quite a surprise. He drove home from the bank at the usual time, driving neither too slowly nor too fast; he parked his car where he always parked it, out of the way of other cars, and he went inside to make his evening meal. Just then, there was a knock at the door. He opened the door, to find a policeman standing on the door-step. "What have I done wrong?" Mr. Hill asked himself. "Have I driven on the wrong side of the road? Has there been some trouble at the bank? Have I forgotten to pay an important bill?" "Hello, Uncle," said the policeman, "My name is Jack."

单选题Henry Kissinger may be the most successful, certainly the most flamboyant, Secretary of State to hold that office in modern times. When he was appointed in the late 1960's, there were no American ties with Communist China, Vietnam and Berlin seemed ready to draw the United States into a third world war, and Russia was seen as "the enemy". But all this has changed, and Henry Kissinger caused much of the change; in 1971, he made his first trip to China, a trip that was the beginning of the current ties between the United States and China. He brought the United States and Russia closer together on major issues by the policy he called "detente", literally meaning a relaxation. His philosophy was always to talk and to bring together. With these two policies, Kissinger did much to draw attention away from any possible Russia-American friction. In 1973 he made his first visit to Egypt. Here he was able to begin U.S. relations with Egypt. He used his contact later to begin the sort of talks that the American press called "shuttle diplomacy". For ninety-nine days, he "shuttled" back and forth on flights between Cairo and Jerusalem to work out a step-by-step withdrawal of Israeli troops from the Sinai desert. His wit, his careful approach to detail, and his presence made "shuttle diplomacy" work. It was the only successful approach to Mid-east peace in the thirty years since the state of Israel was founded. Another major work was the Strategic Arms Limitation Talk. Though his term in office passed with the treaty unsigned, Kissinger left a draft of the treaty to which the Russians had already agreed. The SALT treaty spelled out a one-tenth reduction in nuclear arms, a major accomplishment by any standard, even if one does not consider all the other conditions and limitations included in the treaty. Even though he successfully helped bring an end to the Vietnam War, Kissinger's final days in office were affected, as was the entire executive branch in one way or another, by the scandals of the Nixon White House. Kissinger's critics point to his role in placing wiretaps on the phones of reporters and officials and to what they consider his "high-handed" approach to setting foreign policy. But Kissinger, during the last few months of the Nixon presidency, limited the effects of American domestic problems on our foreign policy. He continued talks in the Middle East. He continued close contact with the Soviet Union. History will decide in the final view, as Kissinger--and many presidents--often said, on the value of his service. Whatever they decide, whether his actions are finally to be considered wise or foolish, he had a personal vision that will he difficult to match.

单选题Industrial production managers coordinate the resources and activities required to produce millions of goods every year in the United States. Although their duties vary from plant to plant, industrial production managers share many of the same major responsibilities. These responsibilities include production scheduling, staffing, procurement and maintenance of equipment, quality control, inventory control, and the coordination of production activities with those of other departments. The primary mission of industrial production managers is planning the production schedule within budgetary limitations and time constraints. They do this by analyzing the plant's personnel and capital resources to select the best way of meeting the production quota. Industrial production managers determine, often using mathematical formulas, which machines will be used, whether new machines need to be purchased, whether overtime or extra shifts are necessary, and what the sequence of production will be. They monitor the production run to make sure that it stays on schedule and correct any problems that may arise. Industrial production managers also must monitor product standards. When quality drops below the established standard, they must determine why standards are not being maintained and how to improve the product. If the problem relates to the quality of work performed in the plant, the manager may implement better training programs, reorganize the manufacturing process, or institute employee suggestion or involvement programs. If the cause is substandard materials, the manager works with the purchasing department to improve the quality of the product's components. Because the work of many departments is interrelated, managers work closely with heads of other departments such as sales, procurement, and logistics to plan and implement company goals, policies, and procedures. For example, the production manager works with the procurement department to ensure that plant inventories are maintained at their optimal level. This is vital to a firm's operation because maintaining the inventory of materials necessary for production ties up the firm's financial resources, yet insufficient quantities cause delays in production. A breakdown in communications between the production manager and the purchasing department can cause slowdown and a failure to meet production schedules. Just-in-time production techniques have reduced inventory levels, making constant communication among the manager, suppliers, and purchasing departments even more important. Computers play an integral part in this coordination. They also are used to provide up-to-date information on inventory, the status of work in progress, and quality standards. Production managers usually report to the plant manager or the vice president for manufacturing, and may act as liaison between executives and first line supervisors. In many plants, one production manager is responsible for all aspects of production. In large plants with several operations, there are managers in charge of each operation, such as machining, assembly, or finishing.

单选题There is also a fat lady who asked Alex ______ he wanted something to eat.

单选题My business brings ______ such a big sum of 200,000 yuan for "the Hope Project".A. inB. aboutC. outD. back

单选题Homework has never been terribly popular with students and even many parents, but in recent years it has been particularly scorned. School districts across the country, most recently Los Angeles Unified, are revising their thinking on his educational ritual. Unfortunately, L. A. Unified has produced an inflexible policy which mandates that with the exception of some advanced courses, homework may no longer count for more than 10% of a student"s academic grade. This rule is meant to address the difficulty that students from impoverished or chaotic homes might have in completing their homework. But the policy is unclear and contradictory. Certainly, no homework should be assigned that students cannot do without expensive equipment. But if the district is essentially giving a pass to students who do not do their homework because of complicated family lives, it is going riskily close to the implication that standards need to be lowered for poor children. District administrators say that homework will still be a part of schooling, teachers are allowed to assign as much of it as they want. But with homework counting for no more than 10% of their grades, students can easily skip half their homework and see vey little difference on their report cards. Some students might do well on state tests without completing their homework, but what about the students who performed well on the tests and did their homework? It is quite possible that the homework helped. Yet rather than empowering teachers to find what works best for their students, the policy imposes a flat, across-the-board rule. At the same time, the policy addresses none of the truly thorny questions about homework. If the district finds homework to be unimportant to its students" academic achievement, it should move to reduce or eliminate the assignments, not make them count for almost nothing. Conversely, if homework matters, it should account for a significant portion of the grade. Meanwhile this policy does nothing to ensure that the homework students receive is meaningful or appropriate to their age and the subject, or that teachers are not assigning more than they are willing to review and correct. The homework rules should be put on hold while the school board, which is responsible for setting educational policy, looks into the matter and conducts public hearings. It is not too late for L. A. Unified to do homework right.

单选题When school officials in Kalkaska, Michigan, closed classes last week, the media flocked to the story, portraying the town"s 2,305 students as victims of stingy taxpayers. There is some truth to that: the property-tax rate here is one-third lower than the state average. But shutting their schools also allowed Kalkaska"s educators and the state"s largest teachers" union, the Michigan Education Association, to make a political point. Their aim was to spur passage of legislation Michigan lawmakers are debating to increase the state"s share of school funding. It was no coincidence that Kalkaska shut its schools two weeks after residents rejected a 28 percent property-tax increase. The school board argued that without the increase it lacked the $1.5 million needed to keep schools open. But the school system had not done all it could to keep the schools open. Officials declined to borrow against next year"s state aid, they refused to trim extracurricular activities and they did not consider seeking a smaller—perhaps more acceptable—tax increase. In fact, closing early is costing Kalkaska a significant amount, including $600,000 in unemployment payments to teachers and staff and $250,000 in lost state aid. In February, the school system promised teachers and staff two months of retirement payments in case schools closed early, a deal that will cost the district $275,000 more. Other signs suggest school authorities were at least as eager to make a political statement as to keep schools open. The Michigan Education Association hired a public relations firm to stage a rally marking the school closings, which attracted 14 local and national television stations and networks. The president of the National Education Association, the MEA"s parent organization, flew from Washington, D.C., for the event. And the union tutored school officials in the art of television interviews. School supervisor Doyle Disbrow acknowledges the district could have kept schools open by cutting programs but denies the moves were politically motivated. Michigan lawmakers have reacted angrily to the closings. The state Senate has already voted to put the system into receivership and reopen schools immediately; the Michigan House plans to consider the bill this week.

单选题{{B}}Text 3{{/B}} Well, he made it up. All of it, apparently. According to a report published on December 29th by Seoul National University in South Korea, its erstwhile employee Hwang Woo-suk, who had tendered his resignation six days earlier, deliberately falsified his data in the paper on human embryonic stem cells that he and 24 colleagues published in Science in May 2005. In particular, Dr Hwang claimed he had created 11 colonies of human embryonic stem cells genetically matched to specific patients. He had already admitted that nine of these were bogus, but had said that this was the result of an honest mistake, and that the other two were still the real McCoy. A panel of experts appointed by the university to investigate the matter, however, disagreed. They found that DNA fingerprint traces conducted on the stem-cell lines reported in the paper had been manipulated to make it seem as if all 11 lines were tailored to specific patients. In fact, none of them matched the volunteers with spinal-cord injuries and diabetes who had donated skin cells for the work. To obtain his promising "results", Dr Hwang had sent for testing two samples from each donor, rather than a sample from the donor and a sample of the cells into which the donor's DNA had supposedly been transplanted. The panel also found that a second claim in the paper-that only 185 eggs were used to create the 11 stem-cell lines-was false. The investigators said the actual number of eggs used was far larger, in the thousands, although they were unable to determine an exact figure. The reason this double fraud is such a blow is that human embryonic stem-cell research has great expectations. Stem cells, which have not yet been programmed to specialise and can thus, in principle, grow into any tissue or organ, could be used to treat illnesses ranging from diabetes to Parkinson's disease. They might even be able to fix spinal-cord injuries. And stem cells cloned from a patient would not be rejected as foreign by his immune system, Dr Hwang's reputation, of course, is in tatters. The university is now investigating two other groundbreaking experiments he claims to have conducted-the creation of the world's first cloned human embryo and the extraction of stem cells from it, and the creation of the world's first cloned dog. He is also in trouble for breaching ethical guidelines by using eggs donated by members of his research team. And it is even possible that the whole farce may have been for nothing. Cloned embryos might be the ideal source of stem cells intended to treat disease, but if it proves too difficult to create them, a rough-and-ready alternative may suffice.

单选题In its broadest sense, attribution theory is concerned with how ordinary people make sense of the world and it______ more controllable and predictable by making attributions as to the causes of people's behaviors and events.(2002年复旦大学考博试题)

单选题TCP stands for ______. A．Technology Concept Principle B．Technique Control Protocol C．Technical Connected Procedure D．Transmission Control Protocol

单选题--What' s wrong? --Nothing serious. I'm just ______ busy. A. much B. more C. too much D. far too

单选题If she doesn't tell him the truth now, he'll simply keep on asking until she ______. A. does B. has done C. will do D. would