单选题According to the passage some guests may be invited because ______.

单选题The first and lasting impression of you is made by ______.

单选题The idea of an hour without TV is NOT radical because

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单选题Are you aware that you actually possess six senses? The sixth is a muscular sense (1) for your muscles intelligently to the exact (2) necessary for each action you perform. For example, when you reach (3) an object, the sensory nerves (4) the muscles to the brain and stop your hand at the correct (5) . This automatic perception of the position of your muscles (6) relation to the object is your muscular (7) in action. Muscles are bundles of fibers (8) from one five-thousandth of an inch to about three inches. They have three (9) characteristics: they can become shorter and thicker; they can (10) ; and they can retract to their original positions. (11) a high powered microscope, muscle tissue is seen (12) long, slender cells with a grainy texture like wood. More than half of a person's body is (13) of muscle fibers, most of (14) are involuntary, in other words, work without (15) direction. The voluntary muscles, those that we move consciously to (16) particular actions, (17) more than five hundred. Women have only 60 to 70 percent as much (18) as men for their (19) mass. That is (20) an average woman can't lift as much, throw as far, or hit as hard as an average man.

单选题Some of the world's most accommodating businessmen specialize in getting you what you want at a fair market price. But they're businessmen with a difference — they're smugglers who deal only in what's illegal. A smuggling operation is complex, so it has to be businesslike. It has managers who plan trips, make deals, and arrange for purchases and pick-ups. It has travelers who deliver the goods, and specialists who recruit and train them. In fact, smugglers frequently have legitimate businesses on the side. A travel agency is helpful because the modern smuggler is a world traveler. When a gold smuggler was arrested recently, he had airline tickets from Geneva to Bangkok by way of Frankfurt, Istanbul, Beirut, Vancouver, Tokyo, Heng Kong, Manila, and Jakarta. The best places for smuggling operations are border cities and seaports. In one such city, annual sales at local stores amounted to $6,900 for every person in town. But the average person only made $3,575 per year. A tiny seaport is the world's third largest importer of Swiss watches — every year, it buys 50 watches for every person in the city. Obviously, the people in these cities are not buying all this merchandise — it is being bought by smugglers. As one expert wrote, "the ingenuity of the smuggler's mind is virtually limitless." In addition to special vests for carrying gold, there are other types of smuggling equipment. A diplomat was arrested in London with 298 watches sewn into his coat lining. British officials discovered a car with a special gas tank containing 2,581 illegal watches. But some smugglers don't need special equipment. A good diamond smuggler can hide two to three small diamonds in his mouth and still carry on a normal conversation. What makes people smuggle? Profit is definitely a motive. Over $1.5 billion in illegal gold alone is smuggled every year, not to mention a multi-million dollar art smuggling trade and a thriving business in illegal diamonds. But many smugglers love excitement as much as profit. As one said, "You don't feel happy unless you have a line open and somebody making a run for you./

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单选题Questions 14-17 are based on the following monologue. You now have 20 seconds to read Questions 14-17.

单选题According to legend, Aesculapius bore two daughters, Panacea and Hyegeia, who gave rise to dynasties of healers and hygienists. The schism (分离) remains today, in clinical training and in practice; and, because of the imperative nature of medical care and the subtlety of health care, the former has tended to dominate. Preventive medicine has as its primary objective the maintenance and promotion of health. It accomplishes this by controlling or manipulating environmental factors that affect health and disease. For example, in California presently there is serious suffering and substantial economic loss because of the failure to introduce controlled fluoridation (加氟作用) of public water supplies. Additionally, preventive medicine applies prophylactic (预防性的) measures against disease by such actions as immunization and specific nutritional measures. Third, it attempts to motivate people to adopt healthful lifestyles through education. For the most part, curative medicine has as its primary objective the removal of disease from the patient. It provides diagnostic techniques to identify the presence and nature of the disease process. While these may be applied on a mass basis in an attempt to "screen" out persons with preclinical disease, they are usually applied after the patient appears with a complaint. Second, it applies treatment to the sick patient. In every case, this is, or should be, individualized according to the particular need of each patient. Third, it utilizes rehabilitation methodologies to return the treated patient to the best possible level of functioning. While it is true that both preventive medicine and curative medicine require cadres of similarly trained personnel such as planners, administrators, and educators, the underlying delivery systems depend on quite distinctive professional personnel. The requirements for curative medicine call for clinically trained individuals who deal with patients on a one-to-one basis and whose training is based primarily on an understanding of the biological, pathological, and psychological processes that determine an individual's health and disease status. The locus (地方)for this training is the laboratory and clinic. Preventive medicine, on the other hand, calls for a very broad spectrum of professional personnel, few of whom require clinical expertise. Since their actions apply either to environmental situations or to population groups, their training takes place in a different type of laboratory or in a community not necessarily associated with the clinical locus. The economic differences between preventive medicine and curative medicine have been extensively discussed, perhaps most convincingly by Winslow in the monograph The Cost of Sickness and the Price of Health. Sickness is almost always a negative, nonproductive and harmful state. All resources expended to deal with sickness are therefore fundamentally economically unproductive. Health, on the other hand, has a very high value in our culture. To the extent that healthy members of the population are replaced by sick members, the economy is doubly burdened. Nevertheless, the per capita cost of preventive measures for specific diseases is generally far lower than the per capita cost of curative medicine applied to treatment of the same disease. Prominent examples are dental caries (蛀牙) , poliomyelitis(脊髓灰质炎 ) and phenylketonuria (苯丙酮尿) . There is an imperative need to provide care for the sick person within a single medical care system, but there is no overriding reason why a linkage is necessary between the two components of a health care system, prevention and treatment. A national health and medical care program composed of semiautonomous systems for personal health care and medical care would have the advantage of clarifying objectives and strategies and of permitting a more equitable division of resources between prevention and cure.

单选题In the relationship of education to business we observe today a fine state of paradox. On the one hand, the emphasis which most business places upon a college degree is so great that one can almost visualize the time when even the office boy will have his baccalaureate. On the other hand, we seem to preserve the belief that some deep intellectual chasm separates the businessman from other products of the university system. The notion that business people are quite the Philistines sounds absurd. For some reason, we tend to characterize vocations by stereotypes, none too flattering but nonetheless deeply imbedded in the national conscience; In the cast of characters the businessman comes on stage as a crass and uncouth person. It is not a pleasant conception and no more truthful or less unpleasant than our other stereotypes. Business is made up of people with all kinds of backgrounds, all kinds of motivations, and all kinds of tastes, just as in any other form of human endeavour. Businessmen are not ambulatory balance sheets and profit statements, but perfectly normal human beings, subject to whatever strengths, frailties, and limitations characterize man on the earth. They are people grouped together in organizations designed to complement the weakness of one with strength of another, tempering the exuberance of the young with the caution of the more mature, the poetic soarings of one mind with the counting house realism of another. Any disfigurement which society may suffer will come from man himself, not from the particular vocation to which he devotes his time. Any group of people necessarily represents an approach to a common denominator, and it is probably true that even individually they tend to conform somewhat to the general pattern. Many have pointed out the danger of engulfing our original thinkers in a tide of mediocrity. Conformity is not any more prevalent or any more exacting in the business field than it is in any other. It is a characteristic of all organizations of whatever nature. The fact is the large business unit provides greater opportunities for individuality and require less in the way of conformity than other institutions of comparable size—the government service, or the academic world, or certainly the military.

单选题The author uses the phrase "weeding out" in the second paragraph to mean ______.

单选题The latter half of the last sentence in paragraph 3, i. e. , "or one tourist for every person living in Spain" means ______.

单选题Birds that are literally half-asleep---with one brain hemisphere alert and the other sleeping- control which side of the brain remains awake, according to a new study of sleeping ducks. Earlier studies have documented half-brain sleep in a wide range of birds. The brain hemi- spheres take turns sinking into the sleep stage characterized by slow brain waves. The eye con- trolled by the sleeping hemisphere keeps shut, while the wakeful hemisphere" s eye stays open and alert. Birds also can sleep with both hemispheres resting at once. Decades of studies of bird flocks led researchers to predict extra alertness in the more vulnerable, end-or-the-row sleepers. Sure enough, the end birds tended to watch carefully on the side away from their companions. Ducks in the inner spots showed no preference for gaze direction. Also, birds dozing(打盹) at the end of the line resorted to single-hemisphere sleep, rather than total relaxation, more often than inner ducks did. Rotating 16 birds through the positions in a four-duck row, the researchers found outer birds half-asleep during some 32 percent of dozing time versus about 12 percent for birds in internal spots. "We believe this is the first evidence for an animal behaviorally controlling sleep and wakefulness simultaneously in different regions of the brain, "the researchers say. The results provide the best evidence for a long-standing supposition that single-hemisphere sleep evolved as creatures scanned for enemies. The preference for opening an eye on the lookout side could be widespread, he predicts. He"s seen it in a pair of birds dozing side-by-side in the zoo and in a single pet bird sleeping by a mirror. The mirror-side eye closed as if the reflection were a companion and the other eye stayed open. Useful as half-sleeping might be, it"s only been found in birds and such water mammals(哺乳动物) as dolphins, whales, and seals. Perhaps keeping one side of the brain awake allows a sleeping animal to surface occasionally to avoid drowning. Studies of birds may offer unique insights into sleep. Jerome M. Siegel of the UCLA says he wonders if birds" half-brain sleep “is just the tip of the iceberg (冰山)”. He speculates that more examples may turn up when we take a closer look at other species.

单选题You will hear three dialogues or monologues. Before listening to each one, you will have time to read the questions related to it. While listening, answer each question by choosing A, B, C or D. After listening, you will have time to check your answer. You will hear each piece once only.

单选题The word" obtuse" (Line 1 ,Paragraph 1) probably means