单选题The doctor told me the medicine can ______ my headache without doing me any harm.

单选题 In every major city in America, commuters are spending more and more time in their cars fighting traffic. The Texas Transportation Institute recently reported that the average commuter spends an extra 46 hours--more than a full workweek--each year caught in traffic. A major source of the congestion is freight trucks. One large truck takes up the space of almost four cars, and the average truck is becoming longer, with more use of double-and triple-trailers. Increases in truck volume, obviously, add to commuting problems, and according to the U. S. Department of Transportation, freight volume is expected to increase by two-thirds over the next 20 years. One proposed solution--building new roads--is expensive and politically contentious. But there's another way: greater use of freight rail. One freight train can carry the cargo of 500 trucks, and one intermodal train can carry nearly 300 truck trailers. Trucking companies and railroads already are forming intermodal partnerships that combine the best of both kinds of transportation. In an urban area like New York, shifting 25% of freight from trucks to freight trains by the year 2025 would reduce drivers' commuting time by 52.9 hours. In addition, such a shift would save $734 per household in annual congestion costs. Shifting freight from road to rail also helps the environment. Freight rail is more fuel-efficient per ton-mile than trucks. And it reduces drivers' fuel consumption by decreasing the time they spend idling in traffic. By 2025, commuters in New York could save 254 gallons of fuel with a 25% shift of freight from truck to rail. Air pollution levels also would improve with an increase in the use of freight rail. For instance, that same 25% shift to rail by 2025 would decrease air pollutants New York by as much as 79,500 tons. To carry out these changes, the freight rail industry will need more capacity, but that depends on return on investments. Because railroads are not meeting their cost of capital, government policymakers may want to consider investment incentives to help meet the growing demand for freight rail. This would enable freight railroads to provide convenient, on-time, quality service to shippers and boost their share of freight transport. It is hard to imagine a less costly or more effective strategy for reducing traffic congestion.

单选题This speculation(a course taught with technology helps students learn more than the one taught in the live classroom)is not baseless: studies comparing technology-based and traditional course offerings are and technology is looking better all the time. Universities that specialize in distance education are learning how to use multimedia courseware and the Internet effectively and the quality of their offerings is gaining increasing recognition. When students in the near future have a choice between(a)attending passive lecture at fixed locations and times in a campus-based curriculum and(b)completing interactive multimedia tutorials at any convenient place and time in a distance-based curriculum, guess which alternative more of them will begin to choose. This is not to say that technology is a panacea. Passive instructional technology—e.g., simply pointing a video camera at a conventional lecture or using the Web only to display text and pictures— does not promote much learning, no matter how dynamic the lecturer or how colorful the graphic images. Moreover, even at its best technology will never be able to do some things that first-rate teachers do routinely, such as advising, encouraging, motivating;, and serving as role models for students, helping them develop the communication and interpersonal skills they will need to succeed in their careers, and getting them to teach and learn from one another. Most successful people can think back to at least one gifted teacher who changed their lives by doing one or more of these things; it is unlikely that anyone will ever be able to do the same for a software package. Here, then, is what our crystal ball says about the students of higher education. An increasing share of undergraduate degrees will be earned in well-designed distance-based programs at conventional universities and institutions without walls like the British Open University, and an increasing number of people will bypass college altogether and seek competency-based certification in fields like information technology. Some highly ranked research universities will still teach traditionally and continue to attract undergraduates by virtue of their prestige, serving primarily as training grounds for graduate schools. Many of the much greater number of less prestigious universities will try to keep doing business as usual, but having to compete for a shrinking pool of undergraduates will force them to either change their practices or close their doors. And a growing number of universities will systematically incorporate interactive multimedia-based instructional software in their live classroom-based courses, making sure that the courses are taught by professors who serve as true mentors to their students and not just transmitters of information. These universities will continue to thrive—and they will provide the best college education.

单选题Modern man is careless when disposing ______ his garbage.

单选题Which of the followings implied in the passage?

单选题According to the description in Paragraph1, which of the following did the author NOT do at that time?

单选题The word "undue" (Line 2. Par

单选题However, many businessmen are active Democrats for reasons ______ economic ones--such as religion, national, racial, or geographic origin, or specific policy issues.

单选题{{B}}Directions:{{/B}} Below each of the following passages you will find some questions or incomplete statements. Each question or statement is followed by four choices marked A, B, C and D. Read each passage carefully, and then select the choice that best answers the question or completes the statement. Mark the letter of your choice with a single bar across the square brackets on your Machine-scoring Answer Sheet. Passage 1 States are considering major changes in prepaid college tuition programs - raising prices, restricting participation of canceling them - as they grapple with financial woes. Nationwide, families will likely have to pay more to participate, or accept that they might not cover tuition when children go to college. Colorado has closed its prepaid plan to new investors and told existing ones that it may not cover future tuition increases. Wisconsin stopped selling its plan Dec. 20. Maryland and Illinois are among states hiking prices by 20% or more. Prepaid plans let parents lock in tuition by paying for it now, protecting them against rising costs. But the hear market has hurt investment returns, leaving the plans unable to keep up with big increases in tuition. So far, Colorado is the only state that has told participants their investments may not cover tuition, and no plan has missed a payment. Other states have said they will fulfill obligations, even if it requires a legislative bailout. Still, the financial problems have forced thousands to grapple with uncertainty - something prepaid plans were designed to avoid. More than 1 million families have an estimated $ 8 billion invested in the plans, says ＜ Saving for College. com ＞. Some states, including Colorado, may replace the prepaid plan with a guaranteed investment contract, a CD-like investment that's backed by an insurance company. Investors get a minimum rate of return, but no guarantee that it will cover tuition. Wisconsin's EdVest program is encouraging investment in a stable value fund, which is similar to a guaranteed investment contract, in its investment plan. Wisconsin's prepaid plan never guaranteed to cover tuition inflation. It also never got a lot of investors, possibly because it lacked that guarantee. In Florida, a task force is considering limiting the state's prepaid program to low-income families. Ohio officials are also looking at limiting participation, but it's a measure they hope to avoid. "Program administrators are looking for alternatives," says Andrea Feirstein, a state-plan consultant. Maryland recently boosted its prices by up to 30%; Illinois by up to 23%. The increases have made some prepaid plans uneconomical for parents of older children. In Ohio, the price of one year's tuition for a child over 12 months old is $ 8, 000, more than 40% above current tuition at Ohio State. SO it may not be a good deal for children starting college in three or four years because tuition may not jump that much that fast.

单选题I must drop a line to my brother.

单选题The changes regarding the learning of a foreign language should have some bearing on the ______i.e. the classroom, where we are expected to learn it.

单选题According to the passage, which may be the best title?

单选题It seems that when Rogers was the writer's boss, the writer ______ .

单选题While modulation/demodulation technology was being standardized for the most recent modems, several other peripheral standards were also being developed. A. auxiliary B. notable C. relevant D. elemental

单选题If I had a car of my own, I ______ it to your sister yesterday. A. will lend B. would lend C. should lend D. would have lent

单选题The two claws of the mature American lobster are decidedly different from each other. The crusher claw is short and stout; the cutter claw is long and slender. Such bilateral asymmetry, in which the right side of the body is, in all other respects, a mirror image of the left side, is not unlike handedness in humans. But where the majority of humans are right-handed, in lobsters the crusher claw appears with equal probability on either the right side or left side of the body. Bilateral asymmetry of the claws comes about gradually. In the juvenile fourth and fifth stages of development, the paired claws are symmetrical and cutterlike. Asymmetry begins to appear in the juvenile sixth stage of development, and the paired claws further diverge toward well-defined cutter and crusher claws during succeeding stages. An intriguing aspect of this development was discovered by Victor Emmel. He found that if one of the paired claws is removed during the fourth or fifth stage, the intact claw invariably becomes a crusher, while the regenerated claw becomes a cutter. Removal of a claw during a later juvenile stage or during adulthood, when asymmetry is present, does not alter the asymmetry; the intact and regenerate claws retain their original structures. These observations indicate that the conditions that trigger differentiation must operate in a random manner when the paired claws are intact but in a nonrandom manner when one of the claws is lost. One possible explanation is that differential use of the claws determines their asymmetry. Perhaps the claw that is used more becomes the crusher. This would explain why, when one of the claws is missing during the fourth or fifth stage, the intact claw always becomes a crusher. With two intact claws, initial use of one claw might prompt the animal to use it more than the other throughout the juvenile fourth and fifth stages, causing it to become a crusher. To test this hypothesis, researchers raised lobsters in the juvenile fourth and fifth stages of development in a laboratory environment in which the lobsters could manipulate oyster chips. (Not coincidentally, at this stage of development lobsters typically change from a habitat where they drift passively, to the ocean floor where they have the opportunity to be more active by borrowing in the substrate.) Under these conditions, the lobsters developed asymmetric claws, half with cutter claws on the left, and half with crusher claws on the right. In contrast, when juvenile lobsters were reared in a smooth tank without the oyster chips, the majority developed two cutter claws. This unusual configuration of symmetrical cutter claws did not change when the lobsters were subsequently placed in a manipulatable environment or when they lost and regenerated one or both claws.

单选题The degree of downward slope of a beach depends on its composition of {{U}}deposits{{/U}} as well as on the action of waves across its surface.

单选题Passages 4 As a wise man once said, we are all ultimately alone. But an increasing number of Europeans are choosing to be so at an ever earlier age. This isn't the stuff of gloomy philosophical contemplations, but a fact of Europe's new economic landscape, embraced by sociologists, real-estate developers and ad executives alike. The shift away from family life to solo lifestyle, observes a French sociologist, is part of the "irresistible momentum of individualism" over the last century. The communications revolution, the shift from a business culture of stability to one of mobility and the mass entry of women into the workforce have greatly wreaked havoc on (扰乱) Europeans' private lives. Europe's new economic climate has largely fostered the trend toward independence. The current generation of home-aloners came of age during Europe's shift from social democracy to the sharper, more individualistic climate of American style capitalism. Raised in an era ofprivatization and increased consumer choice, today's tech-savvy (精通技术) workers have embraced a free market in love as well as economics. Modem Europeans are rich enough to afford to live alone, and temperamentally independent enough to want to do so. Once upon a time, people who lived alone tended to be those on either side of marriage--twenty something professionals or widowed senior citizens. While pensioners, particularly elderly women, make up a large proportion of those living alone, the newest crop of singles are high earners in their 30s and 40s who increasingly view living alone as a lifestyle choice. Living alone was conceived to be negative--dark and cold, while being together suggested warmth and light. But then came along the idea of singles. They were young, beautiful, and strong! Now, young people want to live alone. The booming economy means people are working harder than ever. And that doesn't leave much room for relationships. Pimpi Arroyo, a 35-year-old composer who lives alone in a house in Paris, says he hasn't got time to get lonely because he has too much work. "I have deadlines which would make life with someone else fairly difficult." Only an Ideal Woman would make him change his lifestyle, he says Kaufmann, author of a recent book called "The Single Woman and Prince Charming", thinks this fierce new individualism means that people expect more and more of mates, so relationships don't last long-- if they start at all. Eppendorf, a blond Berliner with a deep tan, teaches grade school in the mornings. In the afternoon she sunbathes or sleeps, resting up for going dancing. Just shy of 50, she says she'd never have wanted to do what her mother did--give up a career to raise a family. Instead, "I've always done what I wanted to do: live a self-determined life./