单选题Mail service will be suspended because of the postal workers' strike.

单选题They"re virtual criminals who prey on IT security weaknesses and are becoming more sophisticated, skilled and organized in their attacks.

单选题Not long ago, Zheng Yuanjie, a famous author of children"s literature, openly expressed his opposition to China"s class council system in his micro-blog, arguing that this system will exert a negative impact on children"s personality development, triggering discussions on whether the current class council system should be cancelled.

单选题______is a grammatical category used for the analysis of word classes displaying such contrast as singular, dual, plural, etc. ______.

单选题It is naive to expect that any society can resolve all the social problems it is faced with ______.

单选题"Ode to the West Wind" is the representative work of romantic poet______.

单选题______rules may change the syntactic representation of a sentence. (西安交通大学2008研)

单选题Scholars often fail to see that music played an important role in the preservation of African culture in the United States. They correctly note that slavery stripped some cultural elements from Black people—their political and economic systems—but they underestimate the significance of music in sustaining other African cultural values. African music, unlike the music of some other cultures, was based on a total vision of life in which music was not an isolated social domain. In African culture, music was pervasive, serving not only religion, but all phases of life, including birth, death, work and play. The methods that a community devises to perpetuate itself come into being to preserve aspects of the cultural legacy that community perceives as essential. Music, like art in general, was so inextricably a part of African culture that it became a crucial means of preserving the culture during and after the dislocations of slavery.

单选题According to Austin"s view, there are two types of sentences; PERFORMATIVES and INFORMATIVES.

单选题When you call the police, the police dispatcher has to locate the car nearest you that is free to respond. This means the dispatcher has to keep track of the status and location of every police car—not an easy task for a large department. Another problem, which arises when cars are assigned to regular patrols, is that the patrols may be too regular. If criminals find out that police cars will pass a particular location at regular intervals, they simply plan their crimes for times when no patrol is expected. Therefore, patrol cars should pass by any particular location at random times; the fact that a car just passed should be no guarantee that another one is not just around the corner. Yet simply ordering the officers to patrol at random would lead to chaos. A computer dispatching system can solve both these problems. The computer has no trouble keeping track of the status and location of each car. With this information, it can determine instantly which car should respond to an incoming call. And with the aid of a pseudorandom number generator, the computer can assign routine patrols so that criminals can"t predict just when a police car will pass through a particular area. (Before computers, police sometimes used roulette wheels and similar devices to make random assignments.) Computers also can relieve police officers from constantly having to report their status. The police car would contain a special automatic radio transmitter and receiver. The officer would set a dial on this unit indicating the current status of the car—patrolling, directing traffic, chasing a speeder, answering a call, out to lunch, and so on. When necessary, the computer at headquarters could poll the car for its status. The voice radio channels would not be clogged with cars constantly reporting what they were doing. A computer in the car automatically could determine the location of the car, perhaps using the LORAN method. The location of the car also would be sent automatically to the headquarters computer.

单选题Negative transfer in learning a second language is known as______.

单选题In a time of social reform, people's state of mind tends to keep______with the rapid changes of society.

单选题Hardly______closed my eyes______began to make this fantastic dream.

单选题What I am telling you is strictly______. Don"t let anyone know of it.

单选题Sociolinguists are interested in "terms of address" because they offer some socio-cultural information about the type of relationship between the speaker and the hearer.（上外2000年研)

单选题The purpose of this election is to set up a government truly______of the people.

单选题In specifying the manner of his CP theory, Grice mentioned all the following EXCEPT______

单选题Of the three cavities, pharynx cavity is the most variable and active in amplifying and modifying speech sounds.（北二外2007研)

单选题Explain the following terms in English．(武汉大学2012研，考试科目：综合英语) Communicative Translation

单选题The distinction between competence and performance was put forward by ______.