单选题Expected noises are usually more ______ than unexpected ones of like magnitude.

单选题In 1816, an apparently insignificant event in a remote part of Northern Europe ______ Europe into a bloody war.

单选题The way people spend their leisure time is what makes people ______and reveals who they are.

单选题From the passage we can infer that the city-dwellers should ______.

单选题There is probably no sound in (1) more chilling than the " hiss " of a diamondback rattlesnake. There is good reason: the western diamondback has killed more humans than (2) snake. It is easily excitable, very aggressive, frequently hungry, and deadly poisonous. Yet it doesn't really hiss. Rather, it (3) its tail. A mature rattler can move its tail up and down between fifty and a hundred times a second! The hollow rattles (4) the tail, beating against each other, create the "hissing" sound. Why does this creature (5) rattles? Rattlesnakes molt three times a year, shedding their outer layer of skin each time. But the molting skin near the tail is not discarded. (6) it hardens and hollows out, becoming another rattle. If a snake had never lost any rattles, you could (7) its age by counting them and dividing by three. Do the snakes need their rattles? The rattles cannot be used in a mating call, (8) rattlesnakes are deaf. They are not a sign of hunger, for snakes with full stomachs rattle as often as hungry (9) . And in the wild, the rattling scares prey. It does not (10) them. Therefore, scientists believe that snakes use rattles merely to warn larger animals not to step on (11) . They have studied them extensively and found that it was a function more important in ages past when the rattlers shared the plains (12) 60 million buffalo! Rattlesnakes are one of the (13) advanced forms of " pit " vipers—animals who possess an organ for an extra sense. The pit organ is like an infrared radar sensor. (14) in the snake's head, the pit organ can sense differences in temperature between inside and outside itself—differences as small as 1% of a degree. Not only can rattlesnakes (15) sense the presence of another animal—or a human—but they apparently can (16) determine its direction and range. These animals don't feed on (17) , of course. Their poison, however, may kill humans. But this happens only in (18) they think is self-defense. Rattlesnakes are really quite (19) Their principal diet of mice and rats makes them valuable to the ecology of the West. So rather than fear them, we should respect the (20) they play in containing the population of these harmful pests.

单选题She's beginning to recover now and taking a little ______. [A] nourishment [B] diet [C] nourishing [D] feeding

单选题It is known to all that children in this region have strong to swimming in summer because of the hot weather. A. inclination B. exposure C. flux D. correlation

单选题In the north of the country, the sun always shines ______ the vast prairie land in summer.

单选题When Ph. D. candidates ______ their impending professorships, they consider housing benefits offered by the prospective universities.

单选题I ______ that you and Jim and Bill have all finished this work. A. doubt B. show C. display D. suspect

单选题It is developing a service that will let you create all online identity that can ______ various claims that it will back up. A. plunge B. assert C. exert D. insert

单选题As the leaves turn yellow and fall, you can feel the______of winter.

单选题In the 1997 general-election campaign, "Education, Education" was Tony Blair"s pet phrase. Times change quickly. Education is going rapidly out of fashion. "Learning" (to be exact, "lifelong learning") is New Labour"s new buzzword (时髦语). The shift from "education" to "learning" reflects more than a change of language. It stems from both educational research and left-wing ideas. During the 1980s, British educationalists got some new American ideas. One was the notion that traditional examinations do not test the full range of people"s abilities. Another was the belief that skills are not necessarily learned from teachers in a conventional classroom. People can pick them up in all sorts of ways. All this echoed left-wing ideas that traditional teaching methods were not sufficiently adaptable to the needs of individual learners. Advocates of lifelong learning argue that it merely describes what has changed in education in the past decade. And there are now hundreds of schemes in which pupils learn outside the classroom. Until now, education has been changing from below. In the next few weeks, the government will help from above. One of its main projects for lifelong learning is about to begin its first pilot programs. With funding of $44 million in its first year, it will coordinate a new network of "learning centers" throughout the country. Traditional institutions, such as schools and colleges, will provide training at some nontraditional places of learning, such as supermarkets, pubs, and churches. The theory is that in such places students will feel more at ease, and therefore will be better motivated, than in a classroom. The new schemes allow consumers of education to exercise complete choice over where, what and when they learn. In the rest of the state-run education sectors (部门), the government still seems to be committed to restricting choices as much as possible. If these programs succeed, they could improve the skills of Britain"s workforce.

单选题It can be inferred from the passage that progressives believed that ______.

单选题According to this passage, Motorola Inc. ______.

单选题Sick ______ she is, she goes to work as usual.

单选题The examples placed before a nation are vital. What we constantly observe, we tend to copy. What we reward, we perpetuate. This is why John Glenn himself is almost as important as his flight into outer space, for he dramatized before the eyes of the whole nation the noblest qualities of the human spirit. Outside of the morality-play of our cowboy movies, where the hero always gets the girl and the villain always gets slugged behind the saloons, courage, modesty, quiet patriotism, love of family and religious faith are not exactly the predominant themes of our novels, plays, TV shows, movies or newspapers these days. Yet Glenn dramatized them all coast to coast and around the world. This was no insensitive robot who landed here from the heavens yesterday morning, but a warm and thoughtful human being: natural, orderly, considerate and, at times, quietly amusing and even eloquent. His departure from Cape Canaveral was a technical triumph, but his return was a human triumph. This memorable performance, of course, may not stamp out juvenile delinquency overnight, but the models of the nation--not the uncovered cover girls of today but the larger models of human character--are probably more important than this age believes. When Walter Bagehot, the English editor and scientist, made his famous study 100 years ago of why some nations progressed, he concluded that what a nation admired and despised was almost as important as its military power. "Slighter causes than is commonly thought," he said, "may change a nation from the stationary to the progressive state of civilization, and from the stationary to the degrading." It all depended, he insisted, on the model of character emulated or eliminated. If this was true in the middle of the nineteenth century it has even more validity in this age of instantaneous communication. Only a few hundred people heard Lincoln's Gettysburg Address. New models and styles are now set by television every day, but most of them are models of cars and styles of dresses and hairdos. What transcontinental television did for the nation on the Glenn story illustrates the wider application of the idea. It almost made up for what it does to us the rest of the time, but not quite. Meanwhile, the question remains: how many more John Clenns and A1 Shepards are hiding in this country? Outer space is a long way to go to discover a new generation of leaders of men, but if we have to recruit them there, why not? Human weightlessness is almost our major problem in Washington and, since these astronauts know more about it than anybody else, maybe a couple of them should be transferred to the thin hot air of the capital. After all, Glenn is 40 and even if he looks like the freshman football coach at Muskingum College he can't go off spinning around the earth without his Annie forever. Once Christopher Columbus had discovered America, Ferdinand and Isabella didn't insist that he go back every Tuesday. Besides, is the moon worth John Glenn when we need him so badly on earth?