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单选题Questions 29 to 30 are based on the following news. At the end of the news, you will be given 10 seconds to answer the questions. Now listen to the news.
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单选题New England is located______
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单选题Questions 29 to 30 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.
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单选题Flight simulator (飞行模拟器) refers to any electronic or mechanical system for training airplane and spacecraft pilots and crew member by simulating flight conditions. The purpose of simulation is not to completely substitute (31) actual flight training but to thoroughly familiarize students with the Vehicle (32) before they (33) extensive and possibly dangerous actual flight training. Simulations also is useful for review and for familiarizing pilots with new (34) to existing craft. Two early flight simulators appeared in England within a decade after the first flight of Orville and Wilbur Wright. They were designed to enable pilots to simulate simple aircraft (35) in three dimensions: nose up or down; left wing high and right low, or vice versa; and (36) to left or right. It took until 1929, however, for a truly effective simulator, the Link Trainer, to appear, devised by Edwin A. Link, a self-educated aviator and inventor from Binghamton, New York. (37) , airplane instrumentation had been developed sufficiently to permit "blind" flying on instruments alone, but training pilots to do so involved (38) risk. Link built a model of an airplane cockpit equipped (39) instrument panel and controls that could realistically simulate all the movements of an airplane. Pilots could use the device for instrument training, manipulating the controls (40) instrument readings so as to maintain straight and level flight or (41) climb or descent with no visual reference (42) any horizon except for the artificial one on the instrument panel. The trainer was modified (43) aircraft technology advanced. Commercial airlines began to use the lank Trainer for pilot training, and the US government began purchasing them in 1934, (44) thousands more as World War II approached. Technological advances during the war, particularly in electronics, helped to make the flight Simulator increasingly (45) . The use of efficient analog computers in the early 1950s led to further improvements. Airplane cockpits, controls, and instrument displays had by then become so individualized that it was no longer feasible to use a generalized trainer to prepare pilots to fly anything (46) the simplest light planes. By the 1950s, the US Air Force was using simulators that precisely (47) the cockpits of its planes. During the early 1960s (48) digital and hybrid computers were adopted, and their speed and flexibility revolutionized simulation systems. Further advances in computer and (49) technology, notably the development of virtual-reality simulation, have made it possible to (50) highly complex real-life conditions.
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单选题Even as a girl, ______ to be her life, and theater audiences were to be her best teacher.
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单选题George Washington ______. A. always will and always has been an American hero B. always has and always will an American hero C. always has and always will be an American hero D. always has been and always will be an American hero
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单选题Modern scientists ______ that truth is not something that we assume, but something found at the end of long investigations. A. affirm B. confirm C. suppose D. presume
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单选题None of my colleagues is familiar with the three major departments of philosophy, logic, metaphysics and epistemology.
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单选题There was a serious accident yesterday. Do you know which driver ______ the accident? A. was to blame for B. was to be blamed for C. is going to blame for D. is going to be blamed for
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单选题Rosamond felt unhappy without any ______ of his project at the meeting. A. clue B. hint C. comment D. mention
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单选题{{B}}TEXT E{{/B}} Nearly two thousand years have passed since a census decreed by Caesar Augustus become part of the greatest story ever told. Many things have changed in the intervening years. The hotel industry worries more about overbuilding than overcrowding, and if they had to meet an unexpected influx, few inns would have a manager to accommodate the weary guests. Now it is the census taker that does the traveling in the fond hope that a highly mobile population will stay long enough to get a good sampling. Methods of gathering, recording, and evaluating information have presumably been improved a great deal. And where then it was the modest purpose of Rome to obtain a simple head count as an adequate basis for levying taxes, now batteries of complicated statistical series furnished by governmental agencies and private organizations are eagerly scanned and interpreted by sages and seers to get a clue to future events. The Bible does not tell us how the Roman census takers made out, and as regards our more immediate concern, the reliability of present day economic forecasting, there are considerable differences of opinion. They were aired at the celebration of tile 125th anniversary of the American Statistical Association. There was the thought that business forecasting might well be on its way from an art to a science, and some speakers talked about newfangled computers and high-falutin mathematical system in terms of excitement and endearment which we, at least in our younger years when these things mattered, would have associated more readily with the description of a fair maiden. But others pointed to the deplorable record of highly esteemed forecasts and forecasters with a batting average below that of the Mets, and the President-elect of the Association cautioned that "high powered statistical methods are usually in order where the facts are crude and inadequate, the exact contrary of what crude and inadequate statisticians assume." We left his birthday party somewhere between hope and despair and with the conviction, not really newly acquired, that proper statistical methods applied to ascertainable facts have their merits in economic forecasting as long as neither forecaster nor public is deluded into mistaking the delineation of probabilities and trends for a prediction of certainties of mathematical exactitude.
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单选题Questions 27 to 28 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.
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单选题The giant pandas' prospects are better now than in the recent past. New insights into behavior, diet and physiology offer hope that we may be able to protect and breed these animals more effectively. Pandas are exceedingly elusive. Pandas are natural vagrants, unsociable and eccentric. There has been considerable debate over the evolution of pandas. Some experts have thought that they descended from raccoons. Others believe they share a common ancestor with the bear, but evolved independently. The animals could once be found in much of southern and eastern China, as well as parts of Southeast Asia. And though the panda's range has steadily shrunk, its habits are unaltered. The panda's routine is indeed a bum's life, spent wandering from one bad meal to another and bedding down in the nearest dark corner. Although pandas can swim and climb trees, they spend most of their time seeking out and chewing bamboo. Pandas have been known to eat chicken and honey when bamboo is in short supply. But in the wild, bamboo is their primary fare. And because it is such a poor source of nutrition and hard for them to digest, pandas must eat prodigious amounts. Pandas consume about 30 pounds of bamboo a day. On this monotonous diet, they attain weights of up to 250 pounds. They make a variety of sounds: bleating, chirping, huffing, snorting and even barking like a dog if startled. At about age five, the female, smaller than the male, will moan, signaling she is receptive. Her call is often answered by as many as three or four males. In late August or September, after a gestation period estimated at 90 to 160 days, the female gives birth. Her litter often consists of two mouse-size newborns covered in sparse white hair, through which their pink skin shows. But she is likely to focus on a single cub--not necessarily the healthier-- and let the other die. The baby is cared for in a cave or hollow tree that the female has lined with bamboo twigs. The mother assumes sole responsibility for the cub, nursing it often during the first six months. She guards her infant closely, earning it in her paw or teeth. Not until it is 18 months old is her offspring, by then almost 100 pounds heavier, ready to live on its own. A female can conceive only two or three days a year. Because she takes 18 months to rear her offspring, she will reproduce only once every two years. The most promising hope for the panda's future seems to be the increased efforts by the Chinese government. Public concern for the welfare of pandas has been heightened by stiff penalties for poaching. So we can, perhaps, begin to dream again of a future with the pandas, born in the wild or returned there after birth, full-furred giants wandering and occasionally meeting deep in the verdant tangles of bamboo. We may never see them, but it is rewarding to think the pandas will be there, for these captivating creatures clearly hold a special place in our hearts.
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单选题
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单选题In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.
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单选题{{I}} Questions 24 to 25 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now listen to the news.{{/I}}
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单选题Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.
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单选题The party is held to ______.
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