单选题Most cloud formations occur when air masses of different temperatures collide.

单选题An Early Form of Jazz Music Music comes in many forms; most countries have a style of their own. At the turn of the last century, (51) jazz was bona, America had no prominent (52) of its own. No one knows exactly when was invented or by whom. But it began to be (53) in the early 1890s. Jazz is America's contribution to (54) music. In contrast to classical music, which (55) formal European traditions, jazz is spontaneous and free in form. It bubbles with energy, (56) the moods, interests, and emotions of the people. In the 1920s' jazz (57) like America. And so it does today. The (58) of the music are as interesting as the music itself. American Negroes, or blacks, as they are called today, were the jazz pioneers. They were brought to the Southern states (59) slaves. They were sold to plantation owners and forced to work long hours. When a Negro died, his friends and relatives (60) a procession to carry to body to the cemetery. In New Orleans, a band often accompanied the (61) . On the way to the cemetery the band played slow, solemn music, suited to the occasion. (62) on the way home the mood changed. Spirits lifted. Death had removed one of their numbers, but the living were glad to be (63) . The band played (64) music, improvising on both the harmony and the melody of the tunes (65) at the funeral. This music made everyone want to dance. It was an early form of jazz.

单选题When I heard the noise in the next room, I couldn"t resist having a peep .

单选题I suppose he will give it to you eventually.A. in a wayB. in due courseC. in the endD. in any case

单选题When people become unemployed, it is {{U}}loafing{{/U}} often worse than lack of wages.

单选题It is laid down in the regulations that all members must carry their membership cards at all times.

单选题The children trembled with fear when they saw the policeman.

单选题In the case of a church wedding, the vicar of each parish in which the bride and bridegroom live is normally informed about a month in advance of the ceremony so that an announcement of the coming wedding can be made in church on each of three Sundays before it takes place. Anyone who may know of an existing marriage of either partner is ordered to give information about it, though this means of avoiding bigamy(重婚) must have been more effective in the days when people moved about the world less than they do today. Often up to a hundred or more people attend the religious service and the bride usually wears the traditional long white dress and veil, while bridesmaids, who are often children, wear long dresses in attractive colors. This may also happen in the case of a civil wedding in a register office but is probably less usual. The arrangements for a church wedding are usually made some time before in order toA. allow the necessary length of time for publicize the wedding.B. provide time for organizing the reception.C. make sure that the guests can arrange to be free on the day.D. ensure a thorough investigation of the couple's existing marital status.

单选题ADS is a fatal disease.A. deadB. deadlyC. dyingD. died

单选题It will be safer to walk the streets because people will not need to carry large amounts of cash. Virtually all financial deals will be conducted by computer.

单选题Many of Carson McCuller"s characters are isolated , disappointed people.

单选题Mary {{U}}called me up{{/U}} very late last night.

单选题I didn't ask because I was afraid of looking stupid.A. foolishB. boringC. childishD. exciting

单选题Light Night, Dark Stars Thousands of people around the globe step outside to gaze at their night sky. On a clear night, with no clouds, moonlight, or artificial lights to block the view, people can see more than 14,000 stars in the sky, says Dennis Ward, an astronomer (天文学家) with the University Corporation for Atmospheric Research (UCAR) in Boulder, Colo. But when people are surrounded by city lights, he says, they"re lucky to see 150 stars. If you"ve ever driven toward a big city at night and seen its glow from a great distance, you"ve witnessed light pollution. It occurs when light from streetlights, office (照亮) the night buildings, signs, and other sources streams into space and illuminates sky. This haze (朦胧) of light makes many stars invisible to people on Earth. Even at night, big cities like New York glow from light pollution, making stargazing difficult. Dust and particles of pollution from factories and industries worsen the effects of light pollution. "If one city has a lot more light pollution than another," Ward says, "that city will suffer the effects of light pollution on a much greater scale." Hazy skies also make it far more difficult for astronomers to do their jobs. Cities are getting larger. Suburbs are growing in once dark, rural areas. Light from all this new development is increasingly obscuring (使变模糊) the faint (微弱的)light given off by distant stars. And if scientists can"t locate these objects, they can"t learn more about them. Light pollution doesn"t only affect star visibility. It can harm wildlife too. It"s clear that artificial light can attract animals, making them go off course. There"s increasing evidence, for example, that migrating (迁徙) birds use sunsets and sunrises to help find their way, says Sydney Gauthreaux Jr., a scientist at Clemson University in South Carolina. "When light occurs at night," he says, "it has a very disruptive (破坏性的) influence." Sometimes birds fly into lighted towers, high-rises, and cables from radio and television towers. Experts estimate that millions of birds die this way every year.

单选题The {{U}}court{{/U}} sentenced him to death for murder.

单选题Two People, Two Paths You must be familiar with the situation: Dad"s driving, Mum"s telling him where to go. He"s sure that they need to turn left. But she says it"s not for another two blocks. Who has the better sense of direction? Men or women. They both do, a new study says, but in different ways. Men and women, Canadian researchers have found, have different methods of finding their way. Men look quickly at landmarks (地标) and head off in what they think is the right direction. Women, however, try to picture the whole route in detail and then follow the path in their head. "Women tend to be more detailed," said Edward Cornell, who led the study, "while men tend to be a little bit faster and... a little bit more intuitive (直觉感知的)." In fact, said Cornell, "sense of direction" isn"t one skill but two. The first is the "survey method". This is when you see an area from above, such as a printed map. You can see, for example, where the hospital is, where the church is and that the supermarket is on its right. The second skill is the "route method". This is when you use a series of directions. You start from the hospital, then turn left, turn right, go uphill—and then you see the supermarket. Men are more likely to use the survey method while women are more likely to use one route and follow directions. Both work, and neither is better. Some scientists insist that these different skills have a long history. They argue it is because of the difference in traditional roles. In ancient times, young men often went far away with the older men to fish or hunt. The trip took hours or day sand covered unfamiliar places. The only way to know where you were was to use the survey method to remember landmarks the mountains, the lakes and so on. The women, on the other hand, took young girls out to find fruits and plants. These activities were much closer to home but required learning well-used paths. So, women"s sense of space was based on learning certain routes.

单选题The Acquisition of Two Companies The Provident Companies, the No. 2 seller of individual disability insurance policies, agreed yesterday to buy the No. 1 insurer in the field in a deal that would give it more than 1/3 of the market. The $1.2 billion deal would eliminate about 600 jobs, give a big Swiss money-losing policies sold by the insurer that is being acquired, the Paul Revere company. Last year Provident's insurance units had $2.6 billion in premium revenues and Paul Revere had $1.5 billion. About 57 percent of the combined $4.1 billion in premiums came from disability policies that were sold to individuals. Provident's next largest competitor, the UNUM Corporation, has about 10 percent of the market. Paul Revere has been controlled since 1985 by Textron Inc. Textron acquired the insurer when it bought Avco Financial Services, which makes high interest rate loans to people whose employment and credit histories make them too risky for bank loans. James F. Hardymon, Textron's chairman and chief executive, said the sale "reinforces Textron's strategy to focus on its core manufacturing and finance businesses." He said, that up to half the income might be used to pay down the company's more than $10 billion of debt or to buy back stock. Paul Revere's remaining public shareholders will get $26 in cash for each share, Provident stock worth $26, or $20 in cash and Provident stock worth $6. To finance the deal, Provident is getting a $300 million infusion of cash from the Zurich insurance Group of Switzerland, which is buying a 15.2% stake in Provident under an agreement allowing it to increase the stake to 40%. Provident, which is based in Chattanooga, Tenn., announced a $423 million write-off on individual disability policies in December 1993. Paul Revere, which is based in Worchester, Mass., has not taken a similar write-off, said John M. Hanon, an analyst at Derby Securities. Provident, Paul Revere and other companies have previously said that they had to pay claims on diseases not even known when the policies were written and that many disability claims resulted in larger than expected benefits payment. The deal drew mixed responses from insurance ratings agencies, which had ranked both companies in the upper grades, indicating a strong likelihood that they would be able over the long haul to pay claims.

单选题Glaciers terminate where the rate of ice loss is equivalent to the forward advance of the glacier. A．stop B．turn C．crack D．rotate

单选题It is well-known that the retired workers in our country are {{U}}eligible{{/U}} to free medical care. A. entitled to B. involved in C. associated with D. assigned to

单选题Many residents of the apartment complexes object to noisy neighbors.