单选题There have been demonstrations on the streets____the recent terrorist attack.

单选题The hours ______ the children spend in their one-way relationship with television people undoubtedly affect their relationship with real people. A. in which B. on which C. when D. that

单选题After dinner he gave Mr. Richardson ______ ride to ______ Capital Airport. A) the, a B) a, the C) /, a D) /, the

单选题It is over two years since my brother ______ the army. A. joins B. joined C. has joined D. had joined

单选题In most American cities, the rent for a one-bedroom apartment was $ 250 or more per month in recent years. In some smaller cities such as Louisville, Kentucky or Jacksonville, Florida the rent was less, but in larger cities it was more. For example, if you lived in Los Angeles, you had to pay $ 400 or more to rent a one-bedroom apartment, and the same apartment rented for $ 625 and up in Chicago. The most expensive rents in the U. S. were in New York City, where you had to pay at least $ 700 a month to rent a one-bedroom apartment in most parts of the city. Renters and city planners are worried about the high cost of renting apartments. Many cities now have rent-control laws to keep the cost of renting low. These laws help low income families who cannot pay high rents. Rent controls in the United States began in 1943 when the government imposed rent controls on all American cities to help workers and the families of soldiers during World War 1][. After the war, only one city—New York—continued these World War [[ controls. Recently, more and more cities have returned to rent controls. At the beginning of the 1980s, nearly one fifth of the people in the United States lived in cities with rent-control laws. Many cities have rent-control laws, but why are rents so high? Builders and landlords blame rent controls for the high rents. Rents are high because there are not enough apart ments to rent, and they blame rent controls for the shortage of apartments. Builders want more money to build more apartment buildings, and landlords want more money to repair their old apartment buildings. But they cannot increase rents to get this money because of the rent-control laws. As a result, landlords are not repairing their old apartments, and builders are not building new apartment buildings to replace the old apartment build ings. Builders are building apartments for high-income families, not low-income families, so low-income families must live in old apartments that are in disrepair. Builders and land lords claim that rent-control laws really hurt low-income families. Many renters disagree with them. They say that rent control is not the problem. Even without rent controls, builders and landlords will continue to ignore low-income housing because they can make more money from high-income housing. The only answer, they claim, is more rent controls and government help for low-income housing.

单选题From the article we eau infer that we are influenced by customs ______.

单选题We were deeply impressed by the rich variety of imported cars ______.

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单选题The hero of the story is an artist in his ______.A. thirtiethB. thirtyC. thirty'sD. thirties

单选题Newton took his revenge on Flamsteed ______.

单选题Well, no gain without pain, they say. But what about pain without gain? Everywhere you go in America, you hear tales of corporate revival. What is harder to establish is whether the productivity revolution that businessmen assume they are presiding over is for real. The official statistics are mildly discouraging. They show that, if you lump manufacturing and services together, productivity has grown on average by 1.2% since 1987. That is somewhat faster than the average during the previous decade. And since 1991, productivity has increased by about 2% a year, which is more than twice the 1978 - 1987 average. The trouble is that part of the recent acceleration is due to the usual rebound that occurs at this point in a business cycle, and so is not conclusive evidence of a revival in the underlying trend. There is, as Robert Rubin, the treasury secretary, says, a "disjunction" between the mass of business anecdote that points to a leap in productivity and the picture reflected by the statistics. Some of this can be easily explained. New ways of organizing the workplace--all that re-engineering and downsizing--are only one contribution to the overall productivity of an economy, which is driven by many other factors such as joint investment in equipment and machinery, new technology, and investment in education and training. Moreover, most of the changes that companies make are intended to keep them profitable, and this need not always mean increasing productivity: switching to new markets or improving quality can matter just as much. Two other explanations are speculative. First, some of the business restructuring of recent years may have been unsuitably done. Second, even if it was well done, it may have spread much less widely than people suppose. Leonard Schlesinger, a Harvard academic and former chief executive of Au Bon Pain, a rapidly growing chain of bakery cafes, says that much "re-engineering" has been crude. In many cases, he believes, the loss of revenue has been greater than the reductions in cost. His colleague, Michael Beer, says that far too many companies have applied re-engineering in a mechanistic fashion, chopping out costs without giving sufficient thought to long-term profitability. BBDO' s Al Rosen Shine is blunter. He dismisses a lot of the work of re-engineering consultants as mere rubbish—"the worst sort of ambulance-chasing./

单选题A. ontoB. monthC. longD. wrong

单选题-Do you think Joshua is the right person for this job? -He is well-grounded in economic theory, but lacks_____in production management.

单选题In each accident the driver was ______.

单选题{{B}}Passage Two{{/B}} Regardless of the source or kind of light, the ability of light to form an image is dependent upon just one thing--a small hole or a lens to bring the rays to a focus. The principle of image formation was discovered in early Greek Times. Later it was realized that the eye itself has a lens and that an image is, in fact, formed on the retina, the rear inside surface of the eyeball. Some man inside a cave or a darkened room noticed that light entering through a small hole in the wall formed an image on the far wall. It was observed that if you enlarge the hole, the image blurred and disappeared. On the other hand, the smaller the hole, the sharper the image-down to a certain diameter after which making the hole smaller makes the image worse again. The function of a pinhole is to screen out all light rays except those coming in a perfectly straight line from the object, thus improving the sharpness of the image. After passing through a point the rays again spread out a little bit, and the size of the image formed will depend upon how far back the wall, screen, or film is from the pinhole. The full exploitation of this phenomenon had to wait for the development of the lens, which gathered in a much larger number of light rays and still brought them to form an image, just as the pinhole did, but with a difference: in a pinhole camera, the light rays form an image that is equally sharp regardless of the distance to the film. When a lens is used, there may be a choice of planes of focus determined by adjusting the lens-to-film distance. Each plane is located some distance behind and relatively parallel to the lens. Actual blown glass was developed early in Egyptian times, and the first lens may have been the bottom of a wine bottle. However, the first deliberate grinding of lenses did not take place until the thirteenth century, and the art did not become established until the sixteenth century. A book on the grinding and polishing of lenses was issued by B. Battista della Porta in 1589, but it was not until 1611 that Kepler compared a lens of glass to the lens in the eye and showed that rays from each point of an object were brought to a focus at each corresponding point of an image on the retina. Then, in 1619, Scheiner demonstrated the actual formation of an inverted image on the retina.

单选题When taken in large quantities some drugs can cause {{U}}permanent{{/U}} brain damage.

单选题According to the passage, a good salesman is one who ______.

单选题Give the message to ______ is at the table. A．whomever B．whosever C．whatever D．whoever