单选题Millions of people in the United States suffer from______ back pain that comes from sitting too long at a desk.(2004年西南财经大学考博试题)

单选题With respect to global warming, the passage suggests that political leaders should______

单选题There are (over) eighty of the pyramids (scattered) along tile banks of (the Nile), (some of them), are different in shape from the true pyramids.

单选题The term "aerobic exercise" (first line in second last paragraph)is a kind of ______.

单选题Since his retirement, Peter Smith, who was ______ a teacher, has written four novels. A. lately B. usually C. formerly D. already

单选题In an allergic reaction, the immune system mistakenly ______ a harmless substance as a harmful one.

单选题It can be concluded from the passage that the "big bang" theory is ______.

单选题They were forced to______on necessities in order to make their limited supplies last the longish winter.

单选题Placing a human being behind the wheel of an automobile often has the same curious effect as cutting certain fibers in the brain. The result in either case is more primitive behavior. Hostile feelings are apt to be expressed in an aggressive way. The same man who will step aside for a stranger at a doorway will, when behind the wheel, risk an accident trying to beat another motorist through an intersection. The importance of emotional factors in automobile accidents is gaining recognition. Doctors and other scientists have concluded that the highway death toll resembles a disease epidemic and should be investigated as such. Dr. Ross A. Mcfarland, Associate Professor of Industrial Hygiene at the Harvard University School of Public Health, said that accidents "now constitute a greater threat to the safety of large segments of the population than diseases do." Accidents are the leading cause of death between the ages of 1 and 35. About one third of all accidental deaths and one seventh of all accidental injuries are caused by motor vehicles. Based on the present rate of vehicle registration, unless the accident rate is cut in half, one of every 10 persons in the country will be killed or injured in a traffic accident in the next 15 years. Research to find the underlying causes of accidents and to develop ways to detect drivers who are apt to cause them is being conducted at universities and medical centers. Here are some of their findings so far: A man drives as he lives. If he is often in trouble with collection agencies, the courts, and police, chances are he will have repeated automobile accidents. Accident repeaters usually are egocentric, exhibitionistic, resentful of authority, impulsive, and lacking in social responsibility. As a group, they can be classified as borderline psychopathic personalities, according to Dr. McFarland. The suspicion, however, that accident repeaters could be detected in advance by screening out persons with more hostile impulses is false. A study at the University of Colorado showed that there were just as many overly hostile persons among those who had no accidents as among those with repeated accidents.

单选题In the country we are excluded from the worries of life in a big town. A. enveloped B. protected C. insulated D. subtracted

单选题The author said that he was overawed by

单选题In this part there are four passages for you to read. After each passage there are five questions, below each of whom there are four answers marked A, B, C and D. Choose the best answer and mark the corresponding letter with a pencil on the Machine-Scoring Answer Sheet with a single line through the center. Many people believe the glare from snow causes snow blindness. Yet, dark glasses or not they find themselves suffering from headaches and watering eyes, and even snowblindness, when exposed to several hours of "snow light". The United States Army has now determined that the glare from snow does not cause snow-blindness in troops in a snow-covered country. Rather, a man's eyes frequently find nothing to focus on in a broad expanse of a snow-covered area So his gaze continually shifts and jumps back and forth over the entire landscape in search of something to look at. Finding nothing, hour after hour, the eyes never stop searching and the eyeballs become sore and the eye muscle aches. Nature balances this annoyance by producing more and more liquid which covers the eyeballs. The liquid covers the eyeballs in increasing quantity until vision blurs. And the result is total, even though temporary, snowblindness. Experiments led the Army to a simple method of overcoming this problem. Scouts ahead of a main body of troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape. Even the scouts themselves throw lightweight, dark-colored objects ahead on which they too can focus. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching through the snow-blanketed landscape. By focusing their attention on one object at a time, the man can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a solid white area is overcome.

单选题Most people choose a lawyer on the basis of such _____________ consideration as his cost, his field of expertise, and the fees he charges.

单选题Several loudspeakers are______ from the ceiling and we can hear the speaker very clearly.(2011年南京师范大学考博试题)

单选题Weld's hopes of assisting homosexual couples to adopt children will require the law to ______ the roles and customs of the child welfare organizations that now administer adoption.

单选题We must try to ______ the best of our moral values for our children and grand-children. A. replace B. remain C. generate D. preserve

单选题Though sometimes __________, all too often technology is seen as a panacea for the great economic, social,and political challenges facing the nation as it embarks on the path of modernization.

单选题In the early 1960s Wilt Chamberlain was one of only three players in the National Basketball Association (NBA) listed at over seven feet. If he had played last season, however, he would have been one of 42. The bodies playing major professional sports have changed dramatically over the years, and managers have been more than willing to adjust team uniforms to fit the growing numbers of bigger, longer frames. The trend in sports, though, may be obscuring an unrecognized reality: Americans have generally stopped growing. Though typically about two inches taller now than 140 years ago, today"s people especially those born to families who have lived in the U.S. for many generations-apparently reached their limit in the early 1960s. And they aren"t likely to get any taller. "In the general population today, at this genetic, environmental level, we"ve pretty much gone as far as we can go," says anthropologist William Cameron Chumlea of Wright State University. In the case of NBA players, their increase in height appears to result from the increasingly common practice of recruiting players from all over the world. Growth, which rarely continues beyond the age of 20, demands calories and nutrients-notably, protein-to feed expanding tissues. At the start of the 20th century, under-nutrition and childhood infections got in the way. But as diet and health improved, children and adolescents have, on average, increased in height by about an inch and a half every 20 years, a pattern known as the secular trend in height. Yet according to the Centers for Disease Control and Prevention, average height-5"9" for men, 5"4" for women-hasn"t really changed since 1960. Genetically speaking, there are advantages to avoiding substantial height. During childbirth, larger babies have more difficulty passing through the birth canal. Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and cannot easily withstand repeated strain imposed by oversize limbs. "There are some real constraints that are set by the genetic architecture of the individual organism," says anthropologist William Leonard of Northwestern University. Genetic maximums can change, but don"t expect this to happen soon. Claire C. Gordon, senior anthropologist at the Army Research Center in Natick, Mass., ensures that 90 percent of the uniforms and workstations fit recruits without alteration. She says that, unlike those for basketball, the length of military uniforms has not changed for some time. And if you need to predict human height in the near future to design a piece of equipment, Gordon says that by and large, "you could use today"s data and feel fairly confident."