单选题______ she realized it was too late to go home.

单选题What is new in NASA's plan to return to the moon by 2018?

单选题 The growth of population during the past few centuries is no proof that population will continue to grow straight upward toward infinity and doom. On the contrary, demographic history offers evidence that population growth has not been at all constant. According to paleo-ecologist Edward Deevey, the past million years show three momentous changes. The first, a rapid increase in population around one million B. C., followed the innovations of tool-making and tool-using. But when the new power from the use of tools had been exploited, the rate of world population growth fell and became almost stable. The next rapid jump in population started perhaps 10,000 years ago, when men began to keep herds, plow and plant the earth. Once again when initial productivity gains had been absorbed, the rate of population growth abated. These two episodes suggest that the third great change, the present rapid growth, which began in the West between 250 and 350 years ago, may also slow down when, or if technology begins to yield fewer innovations. Of course, the current knowledge revolution may continue without foreseeable end. Either way contrary to popular belief in constant geometric growth--population can be expected in the long nm to adjust to productivity.

单选题卓别林主演的电影有( )。

单选题But that he came to help me, I______. A. can't but succeed B. could not have succeeded C. couldn't succeed D. didn't succeeded

单选题Children don''t ______understand what they are reciting, but gradually it will have an impact on their thinking.

单选题A: My apartment is only 10 minutes' walk from the office. Why don't you drop by some time? B:______

单选题意大利“新现实主义电影”出现在( )。

单选题The old man is in the habit of going for a walk along the river every morning except ______ it rains.

单选题Polar explorers have to be extremely ______ to endure the abominable climate and other hardships. A. rough B. hard C. tough D. cautious

单选题The ______ of the dollar can be directly linked to deterioration of the current account of the U.S. balance of payments. A. depression B. depreciation C. description D. deficit

单选题We arranged that Kissinger would fly to Vietnam for talks early in July and then stop in Pakistan on the way back. There he would develop a stomachache that would require him to stay in bed and not be seen by the press. Then, with President Yahya"s cooperation he would be taken to an airport where a Pakistani plane would fly him over the mountains to China. Kissinger"s trip was given the code (密码) name Polo after Marco Polo, another Western traveler who made history by journeying to China. Everything went without a hitch. His slight illness in Islamabad received only minor attention from reporters covering him. They accepted the story that he would be confined to bed for at least a couple of days and began making arrangements for their own entertainment. Because of the need for complete secrecy and the lack of any direct communication facilities between Beijing and Washington, I knew that we would have no word from Kissinger while he was in China. Even after he had returned to Pakistan it would still be important to maintain secrecy. So before Kissinger left, we agreed on a single code word—Eureka—which he would use if his mission were successful. On July 11, A1 Haig, who knew our code word, phoned me to say that a cable from Kissinger had arrived. "What"s the message?" I asked. "Eureka," he replied.

单选题{{B}}Passage One{{/B}} Although no one is certain why migration occurs, there are several theories. One theory claims that prehistoric birds of the Northern Hemisphere were forced south during the Ice Age. As the glaciers melted, the birds came back to their homelands, spent the summer, and then went south again as the ice advanced in winter. In time, the migration became a habit in spite of the disappearance of glaciers. Another theory proposes that the ancestral home of all modern birds was the tropics. When the region became overpopulated, many species were crowded north. During the summer, there was plenty of food, but during the winter, scarcity forced them to return to the tropics. A more recent theory suggests a relationship between increasing daylight and the stimulation of certain glands(腺)in the birds' bodies that may prepare them for migration. One scientist has been able to cause midwinter migrations by exposing birds to artificial periods of daylight. He has concluded that changes occur in the bodies of birds due to seasonal changes in the length of daylight.

单选题In Guangzhou, capital of South China's Guangdong Province, Guangzhou Baiyun International Airport resumed its international flights to Singapore, Malaysia, Thailand, the Philippines and other Southeast Asian nations and regions early this month, said an airport official yesterday. And the airport's flow of international passengers for July has reached 80 percent of the figure for the corresponding month of the previous year. Guangzhou Baiyun International Airport had to cancel some international services to Southeast Asian nations and regions because of the outbreak of SARS beginning in April, the official said. The official predicted his airport's international service would return to normal operation and handle even more international passengers in August. Currently, the Guangzhou airport is operating 22 international flights to 20 foreign metropolises. And nine foreign airlines have resumed their international flights to the airport.

单选题Whatever the causes, English is currently more widely spoken and written than any other language A. ever was B. has ever been C. had ever been D. would ever be

单选题The number of the employees ______ in this company.

单选题Movies are the most popular form of entertainment for millions of Americans. They go to the movies to escape their normal everyday existence and to experience a life more exciting than their own. They may choose to see a particular film because they like the actors or because they have heard the film has a good story. But the main reason why people go to the movies is to escape. Sitting in a dark theater, watching the images on the screen, they enter another world that is real to them. They become involved in the lives of the characters in the movie, and for two hours, they forget all about their own problems. They are in a dream world where things often appear to be more romantic (浪漫的) and beautiful than in real life. The biggest "dream factories" are in Hollywood, the capital of the film industry. Each year, Hollywood studios make hundreds of movies that are shown all over the world. American movies are popular because they tell stories and they are well-made. They provide the public with heroes who do things the average person would like to do but often can't. People have to cope with many problems and much trouble in real life, so they feel encouraged when they see the "good guys" win in the movies.

单选题Anne Whitney, a sophomore at Colorado State University, first had a problem taking test when she began college. "I was always well prepared for my tests. Sometimes I studied for weeks before a test. Yet I would go in to take the test, only to find I could not answer the questions correctly. I would blank out because of nervousness and fear. I couldn't think of the answer. My low grades on the tests did not show what I knew to the teacher." Another student in microbiology had similar experiences. He said, "My first chemistry test was very difficult. Then, on the second test, I sat down to take it, and I was so nervous that I was shaking. My hands were moving up and down so quickly that it was hard to hold my pencil. I knew the material and I knew the answers. Yet I couldn't even write them down." These two young students were experiencing something called test anxiety. Because a student worries and is uneasy about a test, his or her mind does not work as well as it usually does. The student cannot write or think clearly because of the extreme tension and nervousness. Although poor grades are often a result of poor study habits, sometimes test anxiety causes the low grades. Recently, test anxiety has been recognized as a real problem, not just an excuse or a false explanation of lazy students. Special university counseling courses try to help students. In these courses, counselors try to help students by teaching them how to manage test anxiety. At some universities, students take tests to measure their anxiety. If the tests show their anxiety is high, the students can take short courses to help them deal with their tension. These courses teach students how to relax their bodies. Students are trained to become calm in very tense situations. By controlling their nervousness, they can let their minds work easy. Learned information then comes out without difficulty on a test. An expert at the University of California explains, "With almost all students, relaxation and less stress are felt after taking our program. Most of them experience better control during their tests. Almost all have some improvement. With some, the improvement is very great./

单选题Questions 26-30 are based on the following advertisement: Software Systems Specialist Work Schedule: Full Time Salary: $62,500-$92,000 * Location: Washington, DC metropolitan area *Employees within the organization have opportunities for additional salary advancement to the Expert level. Software Systems Specialists are responsible for the planning, implementation and optimization of a wide variety of leading-edge systems software on Unix and Linux-based enterprise class servers used to meet critical intelligence needs. Team members are actively involved in the deployment of new Unix and Linux operating systems; introduction of new web, portal and JAVA application services, database administration and backup/recovery services, as well as the introduction of new systems. They also engage in server performance analysis and tuning, high capacity planning and assessments of new computing technologies to ensure 24×7×365 availability of these enterprise-class servers to customers across the Agency. Senior team members support to the most Complex server systems and are a resource to other team members on technical issues. They work closely with software engineering and network peers providing leadership in the deployment of new systems and the introduction of new technology into the operational environment. Minimum qualifications include the following: a BS or MS in Computer Science, Computer Engineering, Computer Information Systems and/or a closely related degree. A GPA of at least 3.0 on a 4.0 scale is also required.

单选题 Many people think there is no need to take special care over home security. "I'm all right, I'm insured." Maybe--if you're fully insured. Even then you can never recover the real value you place upon your possessions. But you can't insure against the upset and unhappiness that we all feel if our homes are seriously damaged by some stranger, our windows and doors smashed, our precious possessions ruined. "It won't happen to me." Won't it? A home is broken into almost every minute of the day. Thefts of all kinds, including cars and property stolen, happen twice as frequently. "I've nothing worth stealing." You may think not. But in fact every one has something worth a thief's attention. And we all have things of special value to us even if they're worth little or nothing in cash terms. "I'm only a tenant here." The thief doesn't care whether you're a tenant or an owner-occupier. You're just as likely to be robbed. Have a word with the owner of the house ff you think extra locks and fastenings are necessary. "They'll get in any way." Most thieves are always looking for easy jobs. They are soon discouraged by houses they can't get into quickly and easily. So it's worth taking care. This booklet will help you. It's based on the practical experience of police forces throughout the country. Most of the suggestions will cost you only a few minutes extra time and thought. A few may involve some expense, but this is small compared with the loss and unhappiness you might otherwise suffer. If you are in doubt, ask for free advice from the Crime Prevention Officer at your local police station.