单选题According to the passage, diesel-towed barges differ from deep-water vessels in that they ______.

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单选题The police______ him for questioning when they found him sneaking away from the store.

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单选题In an age of perpetual digital connectedness, why do people seem so disconnected? In a Duke University study, researchers found that from 1985 to 2004, the (62) of people who said there was no one with whom they discussed important matters tripled, to 25%; the same study found that (63) , Americans had one-third (64) friends and confidants than they did two decades ago. Another recent study, by researchers at the University of Michigan, found that college students today have (65) less empathy--the ability to understand and (66) the feelings of another-- than students of generations past did. The reason, psychologists (67) , may have something to do with our increasing (68) on digital communication and other forms of new media. It's possible that instead of (69) real friendships off-fine, e-mail and social networking may take the place of them--and the distance (70) in screen-only interactions may breed feelings of isolation or a tendency to care less about other people. The problem is, (71) empathy recedes, (72) does trust. And (73) trust, you can't have a cohesive society. (74) the findings of a new study co-authored by Kevin Rockmann of George Mason University and Gregory Northcraft, a professor of executive leadership at the University of Illinois. Northcraft says high-tech communications like e-mail and videoconferencing strip away the personal interaction needed to (75) trust. In a business setting--as in all other social relationships outside the workplace--trust is a necessary (76) for effective cooperation within a group. In Rockmann and Northcraft's study, 200 students were divided into teams and asked to manage two (77) projects, one having to do with nuclear disarmament (裁军)； the other, price fixing. Some groups (78) via e-mail, some via videoconference and others face to face. In the end, those who met in (79) showed the most trust and most effective cooperation; those using e-mail were the (80) able to work together and get the job done. Northcraft thinks this is because real-life meetings, during which participants can see how engaged their colleagues are, breed more trust. Over e-mail, (81) confirmation of hard work gets lost, which tends to encourage mutual slacking off (懈怠).

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单选题Scholars and students have always been great travelers. The official case for "academic mobility" is now often stated in impressive terms as a fundamental necessity for economic and social progress in the world, and debated in the corridors of Europe; but it is certainly nothing new. Serious students were always ready to go abroad in search of the most stimulating teachers and the most famous academies; in search of the purest philosophy, the most effective medicine, the likeliest road to gold. Mobility of this kind meant also mobility of ideas, their transference across frontiers, and their simultaneous impact upon many groups of people. The point of learning is to share it, whether with students or with colleagues. One presumes that only eccentrics have no interest in being credited with a startling discovery, or a new technique. It must also have been reassuring to know that other people in other parts of the world were about to make the same discovery or were thinking along the same lines, and that one was not quite alone, confronted by inquisition, ridicule or neglect. In the twentieth century, and particularly in the last 20 years, the old footpaths of the wandering scholars have become even in the most distant places immediately feasible, and providing for the very rapid transmission of knowledge. Apart from the vehicle itself, it is fairly easy to identify the main factors which have brought about the recent explosion in academic movement. Some of these are purely quantitative and require no further mention: there are far more centers of learning, and a far greater number of scholars and students. In addition one must recognize the very considerable multiplication of disciplines, particularly in the sciences, which by widening the total area of advanced studies has produced an enormous number of specialists whose particular interests are precisely defined. These people would work in some isolation if they were not able to keep in touch with similar isolated groups in other countries. Frequently these specializations lay in areas where very rapid developments are taking place, and also where the research needed for developments is extremely costly and takes a long time. It is precisely in these areas that the advantages of collaboration and sharing of expertise appear most evident. Associated with this is the growth of specialist periodicals, which enable scholars to become aware of what is happening in different centers of research and to meet each other in conferences and symposia(座谈会). From these meetings come the personal relationships which are at the bottom of almost all formalized schemes of cooperation, and provide them with their most satisfactory stimulus.

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单选题To produce the upheaval in the United States that changed and modernized the domain of higher education from the mid-1860's to the mid-1880's three primary causes interacted. The emergence of a half dozen leaders in education provided the personal force that was needed. Moreover, an outcry for a fresher, more practical, and more advanced kind of instruction arose among the alumni and friends of nearly all of the old colleges and grew into a movement that overrode all conservative opposition. The aggressive 'Young Yale' movement appeared, demanding partial alumni control, a more liberal spirit, and a broader course of study. The graduates of Harvard College simultaneously rallied to relieve the college's poverty and demand new enterprise. Education was pushing toward higher standards in the East by throwing off church leadership everywhere, and in the West by finding a wider range of studies and a new sense of public duty. The old-style classical education received its most crushing blow in the citadel of Harvard College, where Dr. Charles Eliot, a young captain of thirty-five, son of a former treasurer of Harvard, led the progressive forces. Five revolutionary advances were made during the first years of Dr. Elite's administration. They were the elevation and amplification of entrance requirements, the enlargement of the curriculum and the development of the elective system, the recognition of graduate study in the liberal arts, the raising of professional training in law, medicine, and engineering to a postgraduate level, and the fostering of greater maturity in student life. Standards of admission were sharply advanced in 1872~1873 and 1876～1877. By the appointment of a dean to take charge of student affairs, and a wise handling of discipline, the undergraduates were led to regard themselves more as elite in-the-making and less as privileged scions. One new course of study after another was opened up-science, music, the history of the fine arts, advanced Spanish, political economy, physics, classical philology, and international law.

单选题The advance of globalization is challenging some of our most ______ values and ideas, including our idea of what constitutes "home".

单选题A person can be more lonely among men than by himself at home because______.

单选题Now listen to the following recording and answer questions 20 to 22.

单选题These areas rely on agriculture almost ______ , having few minerals resources and underdeveloped industry.

单选题A.Akindofexchange.B.Akindofbusiness.C.Acommercializedexchange.D.Aninternationalfriendshipassociation.

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单选题A) In a word C) Indeed B) In a sense D) In other words

单选题Around 80 percent of the ______ characteristics of most white Britons has been passed down from a few thousand Ice Age hunters. A．spontaneous B．intelligible C．genetic D．random