单选题The ocean bottom, a region nearly 2.5 times greater than the total land area of the Earth, is a vast frontier that even today is largely unexplored and uncharted. Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3 600 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth's surface, the deep ocean bottom is a hostile environment to humans, in some ways as forbidding and remote as the void of outer space. Although researchers have taken samples of deep-ocean rocks and sediments for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation's Deep Sea Drilling Project (DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP's drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean's surface and drill in very deep waters, extracting samples of sediments and rocks from the ocean floor. The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983, During this time, the vessel logged 600 000 kilometers and took almost 20 000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger's core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to calculate what it will probably lo0k like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger's voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth. The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understanding the world's past climates. Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change information that may be used to predict future climates.

单选题More than a year has passed since the space shuttle Columbia broke into pieces over central Texas. This past January President Bush announced a long-term program of space exploration that would return human beings to the Moon, and thereafter send them to Mars and beyond. As this magazine (Natural History) goes to press, the twin Mars Exploration Rovers, Spirit and Opportunity, are wowing the scientists and engineers at the rovers' birthplace--NASA's Jet Propulsion Laboratory (JPL)--with their skills as robotic field geologists. JPL's official rover Web site is being stampeded by visitors. The confluence of these and other events resurrects a perennial debate: with two shuttle failures out of 112 missions, and the astronomical expense of the manned space program, can sending people into space be justified, or should robots do the job alone? Modern societies have been sending robots into space since 1957, and people since 1961. Fact is, it's vastly cheaper to send robots: in most cases, a fiftieth the cost of sending people. Robots don't much care how hot or cold space gets; give them the fight lubricants, and they'll operate in a vast range of temperatures. They don't need elaborate life-support systems, either. Robots can spend long periods of time moving around and among the planets, more or less unfazed by ionizing radiation. They do not lose bone mass from prolonged exposure to weightlessness, because, of course, they are boneless. You don't even have to feed them. Best of all, once they've finished their jobs, they won't complain if you don't bring them home. But there's a flip side to this argument. Back in the late 1960s and early 1970s, in the days of NASA's manned Apollo flights to the Moon, no robot could decide which pebbles to pick up and bring home. But when the Apollo 17 astronaut Harrison Schmitt, the only geologist to have walked on the Moon, noticed some odd, orange and black soil on the lunar surface, he immediately collected a sample. It turned out to be minute beads of volcanic glass. Today a robot can perform staggering chemical analyses and transmit amazingly detailed images, but it still can't react, as Schmitt did, to a surprise. By contrast, packed inside the 150-pound mechanism of a field geologist are the capacities to walk, run, dig, hammer, see, communicate, interpret, and invent. And of course when something goes wrong, an on-the-spot human being becomes a robot's best friend. After landing on Mars this past January 3, did the Spirit rover just roll right off its lander platform and start checking out the neighborhood? No, its air-bags were blocking the path. Not until January 15 did Spirit's remote controllers man-age to get all six of its wheels rolling on Martian soil. Anyone on the scene on January 3 could have just lifted the airbags out of the way and given Spirit a little shove.

单选题The dictionary is shabbily compiled. What makes up somehow is the ______ it encloses.

单选题Is it proper for the government to______public opinion through self-serving, one-sided joumalism? A. touch B. hunt C. sway D. proceed

单选题{{B}}Passage Three{{/B}} Shyness is a nearly universal human trait. Almost everyone has bouts of it, and half of those surveyed describe themselves as shy. Perhaps because it's so widespread, and because it suggests vulnerability, shyness is often an endearing trait: Princess Diana, for example, won millions of admirers with her "Shy Di" manner. The human species might not even exist if not for an instinctive wariness of other creatures. In fact, the ability to sense a threat and a desire to flee are lodged in the most primitive regions of the brain. But at some life juncture, roughly 1 our of every 8 people becomes so timid that encounters with others turn into a source of overwhelming dread. The heart races, palms sweat, mouth grows dry, words vanish; thoughts become cluttered, and an urge to escape takes over. This is the face of social phobia (also known as "social anxiety disorder"), the third most common mental disorder in the United States, behind depression and alcoholism. Some social phobics can hardly utter a sentence without obsession over the impression they are making. Others refuse to use public restrooms or talk on the telephone. Sometimes they go mute in front of the boss or a member of the opposite sex. At the extreme, they built a hermitic life, avoiding contact with others. Though social anxiety's symptoms have been noted since the time of Hippocrates, the disorder was a nameless affliction until the late 1960s and didn't make its way into psychiatry manuals until 1980. As it became better known, patients previously thought to suffer panic disorder were recognized as being anxious only in social settings. A decade ago, 40 percent of people said they were shy, but in today's "nation of strangers" --in which computers and ATMs make face-to-face relations less and less common--that number is nearing 50 percent. Some psychologists are convinced that the Internet culture, often favored by those who fear human interaction, greases the slope from shyness to social anxiety. If people were slightly shy to begin with, they can now interact less and less, and that will make the shyness much worse.

单选题According to the Bible, the concept of equality in justice means ______.

单选题Tom was totally______when he received a C on the exam in history, for he was positive that he could have got an A. A. elated B. frustrated C. incited D. contented

单选题I ______ the justice and fought against corruption at my best.

单选题{{B}}Passage 1{{/B}} Two main techniques have been used for training elephants, which we may call respectively the tough and the gentle. The former method simply consists of setting an elephant to work and beating him until he does what is expected of him. Apart from any moral considerations this is a stupid method of training, for it produces a resentful animal who at a later stage may well turn man-killer. The gentle method requires more patience in the early stages, but produces a cheerful, good-tempered elephant who will give many years of loyal service. The first essential in elephant training is to assign to the animal a single mahout who will be entirely responsible for the job. Elephants like to have one master just as dogs do, and are capable of a considerable degree of personal affection. There are even stories of half- trained elephant calves who have refused to feed and pained to death when by some unavoidable circumstance they have been deprived of their own trainer. Such extreme cases must probably be taken with a grain of salt, but they do underline the general principle that the relationship between elephant and mahout is the key to successful training. The most economical age to capture an elephant for training is between fifteen and twenty years, for it is then almost ready to undertake heavy work and can begin to earn its keep straight away. But animals of this age do not easily become subservient to man, and a very firm hand must be employed in the early stages. The captive elephant, still roped to a tree, plunges and screams every time a man approaches, and for several days will probably refuse all food through anger, and fear. Sometimes a tame elephant is tethered nearby to give the wild one confidence, and in most cases the captive gradually quietens down and begins to accept its food. The next stage is to get the elephant to the training establishment, a ticklish business which is achieved with the aid of two tame elephants roped to the captive on either side. When several elephants are being trained at one time, it is customary for the new arrival to be placed between the stalls of two captives whose training is already well advanced. It is then left completely undisturbed with plenty of food and water so that it can absorb the atmosphere of its new home and see that nothing particularly alarming is happening to its companions. When it is eating normally, its own training begins. The trainer stands in front of the elephant holding a long stick with a sharp metal point. Two assistants, mounted on tame elephants, control the captive from either side, while others rub their hands over his skin to the accompaniment of a monotonous and soothing chant. This is supposed to induce pleasurable sensations in the elephant, and its effects are reinforced by the use of endearing epithets, such as "ho! my son", or "ho! my father", or "my mother", according to the age and sex of the captive. The elephant is not immediately susceptible to such blandishments, however, and usually lashes fiercely with its trunk in all directions. These movements are controlled by the trainer with the metal-pointed stick, and the trunk eventually becomes so sore that the elephant curls it up and seldom afterwards uses it for offensive purposes.

单选题The ease with which the candidate answers difficult questions creates the impression that she has been a public servant for years, but in reality she entered politics only ______.

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单选题I wish I could report a dazzling success but fact it does not quite ______.

单选题Although bound to impose the law, a judge is free to use his discretion to ______ the anachronistic barbarity of some criminal penalties. A. mitigate B. understand C. condone D. provoke

单选题{{B}}Passage Four{{/B}} Marcia Seligson calls the wedding dress the "key metaphor" in the elaborate effort to make the American wedding an "idealized departure from reality", and notes that in the early 1970s, at a time when love-ins, live-ins, and hippie weddings were throwing brickbats at tradition, 94 percent of American brides still chose to be married in white. The color has long been associated with weddings because of its supposed symbolic link to virginity. Commenting slyly on the tradition, Judith Martin (1982) observes that an engaged couple needs to decide "whether wearing a white wedding dress will be worth enduring the sneers of people who believe these must be accessorized by intact hymns". Viewed historically, the link between white and virginity (or, as it is sometimes euphemized, purity) is not as absolute as is often supposed. Brides in ancient Rome married in white, but because the color signified joy; they were veiled in bright orange veil, or flammeum, that suggested the flames of passion. In the western Catholic tradition, too, white has always been the color of joy, and it remains the iconographical-ly correct hue for such jubilant occasions as Easter Sunday. Some traditional societies use white to denote the significance of various passage ceremonies, among them funerals as well as weddings. For example, among the Andaman Islanders, said A. R. Radcliffe-Brown, white indicated simply a change of status; and the traditional Chinese white for funerals was a symbolic representation of hope. The "traditional" white wedding dress, moreover, is a recent innovation. Barbarar Fober explains that its popularity may owe less to the mystique of virginity than to a curious twist of conspicuous display. "Most Victorian bribes," she says, "wore simply their 'best finery' on their wedding day, and many wore traditional ethnic costumes." The white dress was an ostentatiously impractical innovation that became popular among the upper classes precisely because of its defects: "Victorian bribes" from privileged backgrounds wore white to indicate that they were rich enough to wear a dress for one day only. And throughout the first years of this century, brides from somewhat less privileged backgrounds would trot out the white dress on special occasions through-out the first year of their marriage. The custom of locking the treasure away after the wedding--so that, like a toasting glass, it could never be used for a lesser purpose--is less than a hundred years old.

单选题"Is George really leaving the university? .... Yes, but would you mind ______ to anyone':"

单选题When American astronaut Glen returned to the earth and a hearty welcome ______ him, he was considered to be a national hero.

单选题Jack and not I ______ the Great Wall twice.