单选题______is a good form of exercise for both the old and the young.

单选题Microwaves are ______.

单选题Mary likes _______ very much, but she didn"t go _______ last Sunday.

单选题Woman: Your dormitory room isn't very large, is it? Man: I can hardly turn around in it. Question: What does the man mean?

单选题As he was waiting downstairs, he suddenly heard a voice calling from ______.A. overB. aboveC. upD. upon

单选题A number of students in this class ______ to Beijing once or twice. A. were B. have been C. is D. has been

单选题Humans are social animals, and most of us 11 our relationships with family and friends. An emerging 12 of research suggests that relationships can keep us healthier. And a new study finds those social 13 may also help us live longer. This new study combined a large number of previous studies and concluded that a 14 of social interactions ranks right up with smoking and obesity 15 a risk factor for death. Researchers from Brigham Young University 16 148 studies with a total of some 300,000 participants, tracking their social relationships and 17 they survived to the end of their particular study, which averaged about seven years. "Those who scored higher on those measures of social relationships were 50 percent more likely to be 18 at that follow-up than people who scored low on those measures," said Professor Julianne Holt-Lunstad, one of the authors of the study. She pointed out several ways relationships can 19 our health. They can help us cope with stress. They can help us maintain healthy habits 20 eating well, exercising or seeing a doctor. And there"s increasing research that shows a direct but poorly-understood link between relationships and physiological processes in the body.

单选题A recent history of the Chicago meat-packing industry and its workers examines how the industry grew from its appearance in the 1830's through the early 1890's. Meat-packers, the author argues, had good wages, working conditions, and prospects for advancement within the packinghouses, and did not cooperate with labor agitators since labor relations were so harmonious. Because the history maintains that conditions were above standard for the era, the frequency of labor disputes, especially in the mid-1880's, is not accounted for. The work ignores the fact that the 1880's were crucial years in American labor history, and that the packinghouse workers! efforts were part of the national movement for labor reform. In fact, other historical sources for the late nineteenth century record deteriorating housing and high disease and infant mortality rates in the industrial community, due to low wages and unhealthy working conditions. Additional date from the University of Chicago suggest that the packing houses were dangerous places to work. The government investigations commissioned by President Theodore Roosevelt which eventually led to the adoption of the 1906 Meat Inspection Act found the packinghouses unsanitary, while observed that most of the workers were poorly paid and overworked. The history may be too optimistic because most of its data date from the 1880's at the latest, and the information provided from that decade is insufficiently analyzed. Conditions actually declined in the 1880's, and continued to decline after the 1880's, due to are organization of the packing process and a massive influx of unskilled workers. The deterioration. In worker status, partly a result of the new availability of unskilled and hence cheap labor, is not discussed. Though a detailed account of work in the packing-houses is attempted, the author fails to distinguish between the wages and conditions for skilled workers and for those unskilled laborers who comprised the majority of the industry's workers from the 1880's on. While conditions for the former were arguably tolerable due to the strategic importance of skilled workers in the complicated slaughtering, cutting and packing process (though worker complaints about the rate and conditions of work were frequefit), pay and conditions for the latter were wretched. The author's misinterpretation of the origins of the feelings the meat-packers had for their industrial neighborhood may account for the history's faulty generalizations. The pride and contentment the author remarks upon were, arguably, less the products of the industrial world of the packers--the giant yards and the intricate plants--than of the unity and vibrancy of the ethnic cultures that formed a viable community on Chicago's South Side. Indeed, the strength of this community succeeded in generating a social movement that effectively confronted the problems of the industry that provided its livelihood.

单选题Being a foreigner, Cad did not ______ to the joke. A. appreciate B. catch on C. laugh D. like

单选题Even though we had been to her house several times before, we still did not remember ______.

单选题The journal published a series of articles that reviewed the prospects for a new era of "genetic medicine".

单选题Vigorously challenged yet widely ignored, the theory had languished for half a century, primarily due to its lack of a______mechanism to support the hypothesis.

单选题The sense relation which holds the pair of words guest—host is ______.

单选题Because he is ______ , we cannot predict what course he will follow at any moment. A. incoherent B. quiet C. capricious D. harmful

单选题Because oriental ideas of woman's subordination to man prevailed in those days, she______to meet with men on an equal basis.

单选题Alison closed the door of her small flat and put down her briefcase. As usual, she had brought some work home from the travel agency. She wanted to have a quick bite to eat and then, after spending a few hours working, she was looking forward to watching television or listening to some music. She was just about to start preparing her dinner when there was a knock at the door. "Oh, no! Who on earth could that be?" she muttered to herself. She went to the door and opened it just wide enough to see who it was. A man of about sixty was standing there. It took her a moment before she realized who he was. He lived in the flat below. They had passed each other on the stairs once or twice, and had nodded to each other but never really spoken. "Uh, sorry to bother you, but.., uh. .. there's something I'd like to talk to you about," he mumbled. He had a long, thin face and two big front teeth that made him look rather like a rabbit. Alison hesitated, but then, opening the door wide, asked him to come in. It was then that she noticed the dog. She hated dogs--particularly big ones. This one was a very old, very fat bulldog. The man had already gone into her small living-room and, without being asked, had sat down on the sofa. The dog followed him in and climbed up on the sofa next to him, breathing heavily. She stared at it. It stared back. The man coughed. "Uh, do you mind if I smoke?" he asked. Before she could ask him not to, he had taken out a cigarette and lit it. "I'11 tell you why I've come. I...I hope you won't be offended but, well..." he began and then stopped. Suddenly his face went red. His whole body began to shake. Then another cough exploded from somewhere deep inside him. Still coughing, he took out a grey, dirty-looking handkerchief and spat into it. Afterwards he put the cigarette back into his mouth and inhaled deeply. As he did so, some ash fell on the carpet. The man looked around the room. He seemed to have forgotten what he wanted to say. Alison glanced at her watch and wondered when he would get to the point. She waited. "Nice place you've got here," he said at last.

单选题They lost their way in the forest, and ______ made matters worse was that night began to fall. A. it B. that C. which D. what

单选题Which of the following is NOT the reason that the man wanted to buy a stereo?