单选题Jack admitted that he ought not to have taken away the book, ______ ?

单选题The very core of marketing lies in ______. A. an understanding of consumer needs B. the efficient movement of goods C. developing new wants for consumer goods D. making goods readily available to customers

单选题The Middle Eastern bazaar takes you back hundreds - even thousands - of years. A. metaphor B. hyperbole

单选题E.B. White's first children's book was ______.

单选题Ten minutes ______ an hour when one is waiting for phone call.

单选题Video even can be integrated with text to produce ______ and animated documents.

单选题The size of the Eskimo language spoken by most whites is ______.

单选题What you say now is not ______ with what you said last week. A. consistent B. persistent C. permanent D. insistent

单选题The fact that he has made a serious mistake does not ______ your treating him that way. A. justify B. prove C. verify D. agree

单选题For the reasons, the newspaper is having ______ problems in the north of the country.

单选题In recent years, railroads have been combining with each other, merging into super systems, causing heightened concerns about monopoly. As recently as 1995, the top four railroads accounted for under 70 per cent of the total ton-miles moved by rails. Next year, after a series of mergers is completed, just four rail roads will control well over 90 percent of all the freight moved by major rail carriers. Supporters of the new super systems argue that these mergers will allow for substantial cost reductions and better coordinated service. Any threat of monopoly, they argue, is removed by fierce competition from trucks. But many shippers complain that for heavy bulk commodities traveling long distances, such as coal, chemicals, and grain, trucking is too costly and the railroads therefore have them by the throat. The vast consolidation within the rail industry means that most shippers are served by only one rail company. Railroads typically charge such "captive" shippers 20 to 30 percent more than they do when another railroad is competing for the business. Shippers who feel they are being overcharged have the right to appeal to the federal government's Surface Transportation Board for rate relief, but the process is expensive, time consuming, and will work only in truly extreme cases. Railroads justify rate discrimination against captive shippers on the grounds that in the long nm it reduces everyone's cost. If railroads charged all customers the same average rate, they argue, shippers who have the option of switching to trucks or other forms of transportation would do so, leaving remaining customers to shoulder the cost of keeping up the line. It% theory to which many economists subscribe, but in practice it often leaves railroads in the position of determining which companies will flourish and which will fail. "Do we really want railroads to be the arbiters of who wins and who loses in the marketplace?" asks Mar- tin Bercovici, a Washington lawyer who frequently represents shipper. Many captive shippers also worry they will soon be his with a round of huge rate increases. The railroad industry as a whole, despite its brightening fortuning fortunes, still does not earn enough to cover the cost of the capital it must invest to keep up with its surging traffic. Yet railroads continue to borrow billions to ac- quire one another, with Wall Street cheering them on. Consider the $10. 2 billion bid by Norfolk Southern and CSX to acquire Conrail this year. Conrail's net railway operating income in 1996 was just $ 427 million, less than half of the carrying costs of the transaction. Who% going to pay for the rest of the bill? Many captive shippers fear that they will, as Norfolk Southern and CSX increase their grip on the market.

单选题Passage 1 Scientists seeming to cure and prevent insulin-dependent diabetes have discovered what goes wrong in the bodies of a special breed of mice prone to the affliction and, using that knowledge, have developed a way to prevent the disease in the Roberts. Because mouse diabetes is almost identical to human type 1 diabetes (also called insulin-dependent or juvenile-onset diabetes), the researchers say they may be ready to test their techniques on humans in five years and that a treatment for patients in the early stages of the disease could be ready to test in two years. In findings—published in last week's issue of Nature—were obtained by two research groups working independently. One was led by Daniel L. Kaufaman, a molecular biologist at the University of California at Los Angeles, and the other by Hugh O. Mcdevit of Stanford University. "There's great excitement at the prospects for this research" said James Gavin, a diabetes specialist and president of the American Diabetes Association. "These are studies you have to call convincing. They are clearly likely to have human applications. " Type 1 diabetes has long been known to be an autoimmune disease—an ailment in which the immune system, instead of defending the body against invading microbes, mistakenly attacks part of the body. In diabetes, it kills the special cells in the pancreas that make insulin. Without insulin, cells cannot take in sugar. The body is deprived of sugar energy and its accumulation in the bloodstream damages nerves and other issues. The potential new treatments would either stop the immune system from making a mistake or suppress an existing erroneous response.

单选题If the pain in your leg becomes worse, get it ______ at once. A. to be seen B. seen to C. seeing to D. be seen to

单选题This mobile phone is ______ that one, though it"s much smaller in size.

单选题Education should not be restricted to anyone______age group.

单选题{{U}}Presumably{{/U}}, excessive consumption of fried foods has serious consequences as has been proved.

单选题Do you find getting up in the morning so difficult that it is painful? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle. During the hours when you labour through your work you may say that you"re "hot". That"s true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. No one has discovered why this is so, but it leads to such familiar monologues (自言自语) as: "Get up, John! You"ll be late for work again!"The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has. You can"t change your energy cycle, but you can learn to make your life it better. Habit can help, Dr. Kleitman believes. Maybe you"re sleepy in the evening but feel you must stay up late anyway. Counteract (对抗) your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won"t change your cycle, but you"ll get up steam (鼓起干劲) and work better at your low point. Get off to a slow start which saves your energy. Get with a leisurely yawl and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble some search for clean clothes by laying them out the night before. When ever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours.

单选题(Many) a problem concerning the agricultural (production) (have been) solved (this way). A. Many B. production C. have been D. this way