学科分类

已选分类 文学外国语言文学
单选题
进入题库练习
单选题Like most foreigners, I ask a lot of questions, some of which are insultingly silly. But everyone I______has answered those questions with patience and honesty.(浙江大学2010年试题)
进入题库练习
单选题First, the spotted owl was threatened by logging in the Pacific Northwest. Now it’s in danger from a new enemy, the barred owl. Barred owls have been moving to the Northwest from the eastern part of the United States. Stan Sovem has studied spotted owls. Now when he calls for spotted owls, barred owls are starting to appear. Sovem threw a mouse on the ground, and a barred owl grabbed it. Scientists have learned that spotted owls start to vanish when barred owls come. Some barred and spotted owls have mated and produced hybrid babies. One spotted owl was killed by a barred owl. Professor Ned K. Brown of the University of California-Berkeley says, "In some areas of Washington, the barred owls moved into very dense, deep woods. The same kind of woods that are opened up, or destroyed by logging, that adversely influences the spotted owls." Ten years have passed since the federal government began protecting the spotted owl. Loggers were forced to limit logging on seven million acres of government land. No one is sure how the arrival of the barred owls will impact laws that protect spotted laws. The barred owls like to live in the deep forests where loggers like to cut down trees. The barred owls will likely keep migrating to the Northwest.
进入题库练习
单选题
进入题库练习
单选题
进入题库练习
单选题 As people continue to grow and age, our body systems continue to change. At a certain point in your life your body systems will begin to weaken. Your joints may become stiff. It may become more difficult for you to see and hear. The slow change of aging causes our bodies to lose some of their ability to bounce back from disease and injury. In order to live longer, we have always tried to slow or stop this process that leads us toward the end of our lives. Many factors contribute to your health. A well-balanced diet plays an important role. The amount and type of exercise you get is another factor. Your living environment and the amount of stress you are under is yet another. But scientists studying senescence (衰老) want to know: Why do people grow old? They hope that by examining the aging process on a cellular level medical science may be able to extend the length of life.
进入题库练习
单选题The insurance company paid him $10,000 in ______ after his accident. A. compensation B. installment C. substitution D. commission
进入题库练习
单选题Although solutions to a problem are often the. fruit of direct investments in targeted research, the most revolutionary solutions tend to emerge from cross-pollination with other disciplines. Medical investigators might never have known of X rays, since they do not naturally occur in biological systems. It took a physicist, Wilhelm Conrad Rontgen, to discover them--light rays that could probe the body's interior with nary a cut from a surgeon. Here's a more recent example of cross-pollination. Soon after the Hubble Space Telescope was launched in April 1990, NASA engineers realized that the telescope's primary mirror--which gathers and reflects the light from celestial objects into its cameras and spectrographs-had been ground to an incorrect shape. In other words, the billion-and-a-half-dollar telescope was producing fuzzy images. As if to make lemonade out of lemons, though, computer algorithms came to the rescue. Investigators developed a range of clever and innovative image-processing techniques to compensate for some of Hubble's shortcomings. Tums out, maximizing the amount of information that could be extracted from a blurry astronomical image is technically identical to maximizing the amount of information that can be extracted from a mammogram. Soon the new techniques came into common use for detecting early signs of breast cancer. In 1997, for Hubble's second servicing mission, shuttle astronauts swapped in a brand-new, high-resolution digital detector-designed to the demanding specs of astronomers whose careers are based on being able to see small, dim things in the cosmos. That technology is now incorporated in a minimally invasive, low-cost system for doing breast biopsies, the next stage after mammograms in the early diagnosis of cancer. Today, cross-pollination between science and society comes about when you have ample funding for ambitious, long-term projects. America has profited immensely from a generation of scientists and engineers who, instead of becoming lawyers or investment bankers, responded to a challenging vision posed in 1961 by President John F. Kennedy. "We intend to land a man on the Moon," proclaimed Kennedy, welcoming the citizenry to aid in the effort. That generation, and the one that followed, was the same generation of technologists who invented the personal computer. Bill Gates, co-founder of Microsoft, was thirteen years old when the U. S. landed an astronaut on the Moon; Steve Jobs, co-founder of Apple Computer, was fourteen. The PC did not arise from the mind of a banker or artist or professional athlete. It was invented and developed by a technically trained workforce, who had responded to the dream unfurled before them, and were thrilled to become scientists and engineers.
进入题库练习
单选题The charitable acts of their boss used to be greatly praised by the people. However, ruthless company downsizing drives and continued layoffs, coupled with rising pay for top managers, have made him look a good deal less______.
进入题库练习
单选题Engineering students are supposed to be examples of practicality and rationality, but when it comes to my college education I am an idealist and a fool. In high school I wanted to be an electrical engineer and, of Course, any sensible student with my aims would have chosen a college with a large engineering department, famous reputation and lots of good labs and research equipment. But that's not what I did. I chose to study engineering at a small liberal-arts university that doesn't even offer a major in electrical engineering. Obviously, this was not a practical choice; I came here for more noble reasons. I wanted a broad education that would provide me with flexibility and a value system to guide me in my career. I wanted to open my eyes and expand my vision by interacting with people who weren't studying science or engineering. My parents, teachers and other adults praised me for such a sensible choice. They told me I was wise and mature beyond my 18 years, and I believed them. I headed off to college, feeling sure I was going to have an advantage over those students who went to big engineering "factories" where they didn't care if you had values or were flexible. I was going to be a complete engineer: technical genius and sensitive humanist all in one. Now I'm not so sure. Somewhere along the way my noble ideals crashed into reality, as all noble ideals eventually do. After three years of struggling to balance math, physics and engineering courses with liberal arts courses, I have learned there are reasons why few engineering students try to reconcile engineering with liberal-arts courses in college. The reality that has blocked my path to become the typical successful student is that engineering and the liberal arts simply don't mix as easily as I assumed in high school. Individually they shape a person in very different ways; together they threaten to confuse. The struggle to reconcile the two fields of study is difficult.
进入题库练习
单选题Nationally, an ageing population is a problem. But locally it can be a boon. The over-50s control 80% of Britain"s wealth, and like to spend it on houses and high-street shopping. The young "generation rent", by contrast, is poor, distractible and liable to shop online. People aged between 50 and 74 spend twice as much as the under-30s on cinema tickets. Between 2000 and 2010 restaurant spending by those aged 65-74 increased by 33%, while the un- der-30s spent 18% less. And while the young still struggle to find work, older people are retiring later. During the financial crisis full-time employment fell for every age group but the over-65s, and there has been a rash of older entrepreneurs. Pensioners also support the working population by volunteering: some 100 retirees in Christchurch help out as business mentors. Even if they wanted to, most small towns and cities could not capture the cool kids. Mobile young professionals cluster, and greatly prefer to cluster in London. Even supposed meccas like Manchester are ageing: clubs in that city are becoming members-only. Towns that aim too young, like Bracknell and Chippenham, can find their high streets full of closed La Senzas (a lingerie chain) and struggling tattoo parlours. Companies often lag behind local authorities in working this out. They are London-obsessed, and have been slow to appreciate the growing economic heft of the old—who are assumed, often wrongly, to stick with products they learned to love in their youth. But Caroyln Freeman of Revelation Marketing reckons Britain could be on the verge of a marketing surge directed at the grey pound, "similar to what we saw with the pink". The window will not remain open forever: soon the baby boomers will start to ail, and no one else alive today is likely to have such a rich retirement. Meanwhile, with the over-50s holding the purse strings, the towns that draw them are likely to grow more and more pleasant. Decent restaurants and nice shops spring up in the favoured haunts of the old, just as they do in the trendy, revamped boroughs of London. Latimer House, a Christchurch furniture store full of retro clothing and 1940s music, would not look out of place in Hackney. Improved high streets then entice customers of all ages. Indeed, gentrification and gentrification can look remarkably similar. Old folk and young hipsters are similarly fond of vinyl and typewriters, and wander about in outsized spectacles. Some people never lose their edge.
进入题库练习
单选题—We took a taxi and arrived at the station an hour earlier. —You ______ a taxi. Time was enough for you to go there by bus. A.neednt take B.neednt to take C.neednt have taken D.dont need take
进入题库练习
单选题{{B}}Text 2{{/B}} In 1879, Richard Henry Pratt founded the Carlisle Indian School, a remarkable 40-year chapter in this country's failed social policy regarding Native Americans. Pratt's faith could be simply described as: "Kill the Indian, Save the Man!" to eradicate any manifestations of their native culture. When four decades of forcible education ended in 1918, it wasn't clear what Pratt's experiment had killed and what it had saved. But there was one indisputably notable legacy-- the Carlisle football team. In the early 20th century, the Carlisle Indians ascended to the pinnacle(顶点) of the collegiate game. In those years, it began to engage all the Ivy football powers on the gridiron(运动场). And from 1911 to 1913, including the season in which the legendary Jim Thorpe returned from the Olympics to score 25 touchdowns, Carlisle had a 38-3 record, including a 27-6 rout of West Point. Washington Post sportswriter Sally Jenkins has produced a fascinating new book, "The Real All Americans": The Team That Changed a Game, a People, a Nation (Doubleday. $24.95), that examines the Carlisle legend in wonderful detail. At the turn of the century, football was exploding on the college scene, particularly at the Ivy elites, where the sons of the gentry could prepare for the rigors of leadership on the gridiron. They preferred their football brutal. Conversely, the Carlisle team was undermanned and seriously undersized. But Carlisle was blessed with gifted athletes and a wizard of a coach, Pop Warner. Because Carlisle couldn't match the brute force of its rivals, Warner created an entirely new brand of football, relying on speed, deception and guile. In that 1903 Harvard game, Carlisle used the hidden ball trick to score on the second-half kickoff. While the return man pretended to cradle the ball, another player had it tucked into a pocket sewn inside the back of his jersey and ran unmolested 103 yards for a touchdown. Carlisle developed new blocking techniques that compensated for its size disadvantage: the spiral throw that put the long pass, with its premium(优势) on speed, into the offense and a repertoire of fakes; reverses and misdirection that remain a central part of the game. It took brains to concoct the schemes and intelligence to execute them. These innovations did not go unrecognized. After Carlisle trounced Army in 1912, The New York Times hailed the conquerors from Carlisle for playing "the most perfect brand of football ever seen in America." Still, today this country celebrates football like no other sport. Jenkins does a marvelous job of making an intimate connection between our beloved, modern game and the unlikely team that, a century ago, helped make it what it is today.
进入题库练习
单选题He is the author of this novel with high ______ in the country.
进入题库练习
单选题To have true disciples, a thinker must not be too______: any effective intellectual leader depends on the ability of other people to______ thought processes that did not originate with them.
进入题库练习
单选题What happened after the man asked if he could smoke?
进入题库练习
单选题Had Julie been more careful on the maths exam, she ______ much better results now.
进入题库练习
单选题The United States Food and Drag Administration has shown itself to be particularly wary with regard to alleged "miracle" drugs in recent times. A. bellicose B. exhausted C. cautious D. strange
进入题库练习
单选题{{B}}Text 2{{/B}} Michael Porter, who has made his name throughout the business community by advocating his theories of competitive advantages, is now swimming into even more shark-infested waters, arguing that competition can save even America's troubled health-care system, the largest in the world. Mr. Porter argues in "Redefining Health Care" that competition, if properly applied, can also fix what ails this sector. That is a bold claim, given the horrible state of America's health-care system. Just consider a few of its failings: America pays more per capita for health care than most countries, but it still has some 45m citizens with no health insurance at all. While a few receive outstanding treatment, he shows in heart-wrenching detail that most do not. The system, wastes huge resources on paperwork, ignores preventive care and, above all, has perverse incentives that encourage shifting costs rather than cutting them outright. He concludes that it is "on a dangerous path, with a toxic combination of high costs, uneven quality, frequent errors and limited access to care." Many observers would agree with this diagnosis, but many would undoubtedly disagree with this advocacy of more market forces. Doctors have an intuitive distrust of competition, which they often equate with greed, while many public-policy thinkers argue that the only way to fix America's problem is to quash the private sector's role altogether and instead set up a government monopoly like Britain's National Health Service. Mr. Porter strongly disagrees. He starts by acknowledging that competition, as it has been introduced to America's health system, has in fact done more harm than good. But he argues that competition has been introduced piecemeal, in incoherent and counter-productive ways that lead to perverse incentives and worse outcomes:" health-care competition is not focused on delivering value for patients," he says. Mr. Porter offers a mix of solutions to fix this mess, and thereby to put the sector on a genuinely competitive footing. First comes the seemingly obvious (but as yet unrealized) goal of data transparency. Second is a redirection of competition from the level of health plans, doctors, clinics and hospitals, to competition "at the level of medical conditions, which is all but absent". The authors argue that the right measure of "value" for the health sector should be how well a patient with a given health condition fares over the entire cycle of treatment, and what the cost is for that entire cycle. That rightly emphasizes the role of early detection and preventive care over techno-fixes, pricey pills and the other fallings of today's system. If there is a failing in this argument, it is that he sometimes strays toward naive optimism. Mr. Porter argues, for example, that his solutions are so commonsensical that private actors in the health system could forge ahead with them profitably without waiting for the government to fix its policy mistakes. That is a tempting notion, but it falls into a trap that economists call the fallacy of the $20 bill on the street. If there really were easy money on the pavement, goes the argument, surely previous passers-by would have bent over and picked it up by now. In the same vein, if Mr. Porter's prescriptions are so sensible that companies can make money even now in the absence of government policy changes, why in the world have they not done so already? One reason may be that they can make more money in the current sub-optimal equilibrium than in a perfectly competitive market—which is why government action is probably needed to sweep aside the many obstacles in the way of Mr. Porter's powerful vision.
进入题库练习
单选题All human beings have a comfortable zone regulating the ______ they keep from someone they talk with. A) distance B) scope C) range D) boundary
进入题库练习