单选题______ my way to school, I met with an old friend of mine.A. AtB. DuringC. OnD. In

单选题Every ______of a motion picture is the responsibility of the director. A. section B. facet C. character D. footage

单选题Her spirits ______ at the thought of all the work she had to do that morning.

单选题(The age of) a geological sample can (be estimated) from the ratio of radioactive to nonradioactive carbon (present) in the object (is examined).

单选题It was until dark ______ he found ______ it was the correct way to solve the problem. A) that; what B) that; that C) when; what D) when; that

单选题A: I heard you've had your book published. Congratulations!B: ______

单选题By enshrining the scientific outlook on development in its constitution, the CPC has made a commitment to the Chinese people and to the whole world that it will follow the path of sustainable development and make sure the fruits of development are shared by all people.

单选题We lost two superstars in 1977. Neither man's admirers have been able to understand the success of the other one. And this tells us something of the difference between the generations that the two singers represent. There were similarities between Bing Crosby and Elvis Presley. Both reached fame while young and became very rich. Although neither one had any musical education, both developed their own musical styles, which were at first criticized by the critics and later studied as new forms in the art of popular song. Both men had successful movie careers despite a total lack of acting ability. Both were creations of the microphone, which made it possible for singers with weak voices to be heard beyond the third row. With Bing the microphone was usually hidden; but Elvis brought it to the stage. The difference between the two men reflects the changing values in American life. Crosby's music was soothing(令人舒畅的); Presley's was disturbing. Crosby was singing to wartime America. His audiences had all the disturbances they could handle in their private lives; they did not want to buy more at the record shop and the movie theater. Crosby's admirers always said how "relaxed" and "natural" he was. When Presley began his career, the whole country had become relaxed and easygoing. Its young people, who had no memory of troubled times, found it boring. They were hungry for excitement. They welcomed Elvis, who was certainly not the kind of young man their parents would admire. Presley was loud and vulgar (粗俗的)—and he was bringing something new and exciting. It is probably too simple to explain each man in terms of changes in the economic and political situation. Something in the culture was also changing.

单选题By the year 2050, scientists probably______a cure for cancer.

单选题In the water around New York City there is a very small island called Liberty Island. On Liberty Island there is a special statue called the Statue of Liberty. It is one of the most famous sights in the world. The Statue of Liberty was a gift from the people of France to the people of the United States. The statue was made by a French sculptor named Frederic Auguste Bartholdi. The inner support system was designed by Gustave Eiffel, the same man who made the famous Eiffel Tower in Paris. Liberty, of course, means freedom, and the Statue of Liberty was given to the United States to celebrate the one-hundredth anniversary of U. S. independence from England. The statue was built in France, taken apart piece by piece, and then rebuilt in the United States. It was opened for the public on October 28, 1886. As you might expect, the statue is very big. Visitors can ride an elevator from the ground to the bottom of the statue. If they want to, they can then walk up the 168 steps to reach the head of the statue where they can look out and enjoy the beautiful sight of the city of New York.

单选题Convenience food helps companies by creating growth, but what is its effect on people? For people who think cooking was the foundation of civilization, the microwave is the last enemy. The communion of eating together is easily broken by a device that liberates household citizens from waiting for mealtimes. The first great revolution in the history of food is in danger of being undone. The companionship of the campfire, cooking pot and common table, which have helped to bond humans in collaborative living for at least 150,000 years, could be destroyed. Meals have certainly suffered from the rise of convenience food. The only meals regularly taken together in Britain these days are at the weekend, among rich families struggling to retain something of the old symbol of togetherness. Indeed, the day"s first meal has all but disappeared. In the 20th century the leisure British breakfast was undermined by the cornflake; in the 21st breakfast is vanishing altogether, a victim of the quick cup of coffee in Starbucks and the cereal bar. Convenience food has also made people forget how to cook. One of the apparent paradoxes of modern food is that, while the amount of time spent cooking meals has fallen from 60 minutes a day in 1980 to 13 minutes a day in 2002, the number of books and television programmes on cooking has multiplied. But perhaps this isn"t a paradox. Maybe it is because people can"t cook any more, so they need to be told bow to do it. Or maybe it is because people buy books about hobbies-golf, yachting-not about chores. Cooking has ceased to be a chore and has become a hobby. Although everybody lives in the kitchen, its facilities are increasingly for display rather than for use. Mr. Silverstein"s new book, Trading Up , look at mid-range consumer"s willingness to splash out. He says that industrial-style Viking cooktops, with nearly twice the heat output of other ranges, have helped to push the "kitchen as theater" trend in home goods. They cost from $1,000 to $9,000. Some 75% of them are never used. Convenience also has an impact on the healthiness, or otherwise, on food. Of course, there is nothing bad about ready-to-eat food itself. You don"t get much healthier than an apple, and all supermarkets sell a better-for-you range of ready-meals. But there is a limit to the number of apple people want to eat; and these days it is easier for people to eat the kind of food that makes them fat. The three Harvard economists in their paper "Why have Americans become more obese?" point out that, in the past, if people wanted to eat fatty hot food, they had to cook it. That took time and energy—a good chip needs frying twice, once to cook the potato and once to get it crispy—which discouraged consumption of that sort of food. Mass preparation of food took away that constraint. Nobody has to cut and double-cook their own fries these days. Who has the time?

单选题______there was an epidemic approaching, Mr. Smith ______ the invitation to visit that are

单选题 Sporting activities are essentially modified forms of hunting behavior. Viewed biologically, the modem foot-bailer is in reality a member of a bunting group. His killing weapon has turned into a harmless football and his prey (猎物) into a goalmouth. If his aim is accurate and he scores a goal, be enjoys the hunter's triumph of killing his prey. To understand how this transformation has taken place we must briefly look back at our forefathers. They spent over a million years evolving as cooperative hunters. Their very survival depended on success in the hunting-field. Under this pressure their whole way of life, even their bodies, became greatly changed. They became chasers, runners, jumpers, aimers, throwers and prey-killers. They cooperated as skillful male-group attackers. Then about ten thousand years ago, after this immensely long period of hunting their food, they became farmers. Their improved intelligence, so vital to their old hunting life, was put to a new use—that of controlling and domesticating their prey. The hunt became suddenly out of date. The food was there on the farms, awaiting their needs. The risks and uncertainties of the hunt were no longer essential for survival.

单选题It is ______ that text messaging while driving is dangerous.

单选题Communication between villages and the nearest town was poor. Roads were bad; there was some attempt to keep them in order, but as each parish was responsible for its own section of road, the state of repair depends on the zeal of the parish officers. There was, however, little wheeled traffic except for farm coaches used by men of wealth. Most traffic was by means of pack horses. Travelers rode on horseback or walked. Since communication was so difficult, the local markets, held weekly at the nearest town, or the fairs, held annually at the greater cities, became important places for the exchange of goods of all kinds.

单选题There was a period of ______ prior to their divorce, during which she went for a trip around the world and he stayed at home.

单选题I think it ______ to let farmers have their own land. In that way, they can farm the land by themselves, and food production will be higher. A. no good B. makes sense C. talks sense D. usefulness

单选题There are advantages and disadvantages to 21 Asian and Western educational method. For example, one advantage 22 the education in Japan is that students there learn much more math and science 23 American students. They also study more hours each day than Americans 24 . The study is difficult, but it 25 students for a society that values discipline (纪律) and self-control. There is, however, a disadvantage. Memorization is an important learning method in Japanese schools, 26 many students say that after an exam, they forget much of the information that they have memorized. The advantage to the education in North America, 27 the other hand, is that students learn to think by themselves. The system prepares them for a society that values 28 ideas. There is, however, a disadvantage. When students graduate from high school, they haven't memorized 29 many basic rules and facts as students in other countries 30 .

单选题Four categories of Maxims in Grice's Cooperative Principle include all the following except______.(大连外国语学院2008研)

单选题According to Dr. Liu's paper, the dwindling of biodiversity is due to