单选题Dr. Bergsten also has served on the senior staff of the National Security Council, 1969-71, and as a senior fellow of the Brookings Institution, another prominent Washington "think-tank'. A. permanent B. famous C. president D. important

单选题The {{U}}shabby{{/U}} treatment from his colleagues made him very angry. A. unforgettable B. unbelievable C. unfair D. unthinkable

单选题Dining Custom Every land has its own dining custom, and the United States is no exception. Americans feel that the first rule of being a polite guest is to be on time. If a person is invited to dinner at 6:30, the hostess expects him to be there at 6:30 or not more than a few minutes after. Because she usually does her own cooking, she times the meal so that the coffee and meat will be at their best at the time she asks the guest to come. If he is late, the food will not be so good, and the hostess will be disappointed. When the guest cannot come on time, he calls his host or hostess on the telephone, gives the reason, and tells at what time he thinks he can come. As guests continue to arrive, the men in the group stand when a woman enters and remain standing until she finds a chair. A man always rises when he is being introduced to a woman. A woman does not rise when she is being introduced either to a man or a woman unless the woman is much older. When the guests sit down at a dinner table, it is customary for the men to help the ladies by pushing their chairs under them. Even an American may be confused by the number of knives, forks, and spoons besides his plate when he sits down to a formal dinner. The rule is simple, however, use them in the order in which they lie, beginning from the outside, or watch the hostess and do what she does. The small fork on the outside on the left is for salad, which is often served with the soup. The spoon on butter spreader, on a small bread-and-butter plate is at the left. As the bread is passed, each quest puts his piece on the bread-and-butter plate.

单选题He lacked the strength to deal with all these problems.A. cope withB. talk aboutC. copy downD. think of

单选题Neoclassical growth theory predicts absolute convergence for economies with equal rates of savings and population growth and with access to the sane technology.A. impliesB. forecastsC. announcesD. advocates

单选题He accused that company of breaking the contract.

单选题The White House We got up early this morning and (51) a long walk after breakfast. We walked through the business section of the city. I told you yesterday that the city was larger (52) I thought it would be. (53) the business section is smaller than I thought it would be. I suppose that's (54) Washington is a special kind of city. (55) the people in Washington work for the government. About 9:30 we went to the White House. It's (56) to the public from 10 till 12, and there was a long line of people waiting to gel in. We didn't have to wail very long, because the line moved (57) quickly. The White House is really white. It is painted ever7 year. And it seems very while, because it's got beautiful lawns all around it, (58) many trees and shrubs. The grounds (59) about four square blocks. I mean, they're about two blocks long (60) each side. The part (61) the President lives and works is not open to the public. But the part we saw was beautiful. We went through tire of the main rooms. One of them was the library, on the ground floor. On the next floor, there are three rooms named (62) the colors that are used in them: the Red Room, the Blue Room and the Green Room. The walls are covered with silk (63) . There are (64) old furniture, from the time (65) the White House was first built. And everywhere there are paintings and statues of limner presidents and other famous people from history.

单选题Healthy Food Street sellers, particularly in developing countries, supply large amounts of food 31 people on low incomes. This sector (部门) also employs some 6%～25% of the work force, mainly women, in developing countries, and provides markets for agricultural and other produce. In many countries, 32 , the authorities are not willing to recognize it as a formal sector of the food 33 system; they may ignore it in food control programs or even try to put an end to 34 . There are two possible contaminants (污染物): pathogenic (病原) micro-organisms (微生物) 35 harmful chemicals. As 36 as micro-organisms are concerned, there is apparently no convincing evidence that street foods are more involved in the transmission of infection than foods obtained in，e.g. hotels. Studies in Egypt and elsewhere have found street foods to compare not unfavorably with hotel 37 in respect of contamination with micro-organisms. Some street foods were found to be contaminated with pathogens (病原菌), but so were foods from four, and five-star 38 in the same area. Harmful chemicals have been found in street foods，and food exposed for sale on roadsides, may become 39 by lead from vehicle exhausts. Health dangers may arise from: purchase of raw materials of 40 quality; improper storage, processing, and cooking, leading 41 reuse of water; limited piped drinking-water; lack of refrigeration (冷藏); unsatisfactory waste-disposal facilities; and personal cleanliness. The authorities should 42 into account the potentials of different categories of food for transmitting disease, and should set appropriate standards of control for the different categories—sellers of bottled drinks require less control than those of food. Dry foods, dried grains, and sugared foods are 43 likely to transmit disease than cooked rice, low-acid milk, egg, and meat products. 44 , foods which are thoroughly cooked and eaten at 45 are safer than precooked food kept at high temperatures for several hours.

单选题Smiling is the universal sign for goodwill, and it reduces social tension. I went to a job interview when I was about 18, and I was so nervous that I could (51) keep myself from (52) . After five minutes, the (53) said the manager would meet me. I moved slowly (54) the manager's office door and opened it (55) . There, standing behind his desk with his hand outstretched in greeting, was a man (56) about 50, and he was grinning(露齿而笑)from ear to ear. "Come in and have a seat, David," he said. He shook my hand and told me that he was happy I had come. It wasn't long before my anxiety inched away in the glow of his bright smile and warm (57) . When I left that meeting with my new job, I couldn't remember why I had been so afraid (58) . A warm smile made all the (59) . In some cultures, eye contact is a sign of aggression especially (60) it is made between inferiors(下级) and superiors(上级), but in most western countries it is a (61) of honesty and goodwill. Eye contact simply means to look at someone directly into their eyes. (62) staring long into someone else's eyes can be (63) as something inappropriate if that person is not a loved one, making proper eye contact (64) the greeting ritual is absolutely necessary. In western countries, a person who cannot or will not make eye contact is perceived (理解) (65) dishonest. Remember, during the greeting ritual, you must make eye contact.

单选题DNA Fingerprinting DNA is the genetic material found within the cell nuclei of all living things. In mammals the strands of DNA are grouped into structures called chromosomes. With the exception of identical siblings (as in identical twins), the complete DNA of each individual is unique. DNA fingerprinting is sometimes called DNA typing. It is a method of identification that compares bits of DNA. A DNA fingerprint is constructed by first drawing out a DNA sample from body tissue or fluid such as hair, blood, or saliva. The sample is then segmented using enzymes, and the segments are arranged by size. The segments are marked with probes and exposed on X-ray film, where they form a pattern of black bars—the DNA fingerprint. If the DNA fingerprints produced from two different samples match, the two samples probably came from the same person. DNA fingerprinting was first developed as all identification technique in 1985. Originally used to detect the presence of genetic diseases, it soon came to be used in criminal investigations and legal affairs. The first criminal conviction based on DNA evidence in the United States occurred in 1988. In criminal investigations, DNA fingerprints derived from evidence collected at the crime scene are compared to the DNA fingerprints of suspects. Generally, courts have accepted the reliability of DNA testing and admitted DNA test results into evidence. However, DNA fingerprinting is controversial in a number of areas: the accuracy of the results, the cost of testing, and the possible misuse of the technique. The accuracy of DNA fingerprinting has been challenged for several reasons. First, because DNA segments rather than complete DNA strands are "fingerprinted": a DNA fingerprint may not be unique; large-scale research to confirm the uniqueness of DNA fingerprinting test results has not been conducted. In addition, DNA fingerprinting is often done in private laboratories that may not follow uniform testing standards and quality controls. Also, since human beings must interpret the test, human error could lead to false results. DNA fingerprinting is expensive. Suspects who are unable to provide their own DNA to experts may not be able to successfully defend themselves against charges based on DNA evidence. Widespread use of DNA testing for identification purposes may lead to the establishment of a DNA fingerprint database.

单选题She stood there, {{U}}trembling{{/U}} with fear. A. jumping B. crying C. moving D. shaking

单选题The {{U}}steadily{{/U}} rising cost of labor on the waterfront has greatly increased the cost of shipping cargo by water. A. continuously B. quickly C. excessively D. exceptionally

单选题The little gift Ugrasped/U her mother's arm as she crossed the street.

单选题These animals （migrate） south annually in search of food.

单选题He achieved success through hard work.A. reachedB. attainedC. reapedD. took

单选题John is collaborating with Mary in writing an article.

单选题The towers of a suspension bridge serve as a rigid framework to which the cables are attached.

单选题You will get to the school more quickly if you take this track across the fields.A. pathB. passageC. roadD. motorway

单选题Have you talked to her lately ?

单选题There was a profound silence after his remark. A. proud B. short C. sudden D. deep