单选题In a world in which hunger remains Uprevalent/U, machines and organizations hold the key to producing more food and distributing it equitably.

单选题Invisibility Ring Scientists can"t yet make an invisibility cloak (斗篷) like the one that Harry Potter uses. But, for the first time, they"ve constructed a simple cloaking device that makes itself and something placed inside it invisible to microwaves. When a person "sees" an object, his or her eye senses many different waves of visible light as they bounce off the object. The eye and brain then work together to organize these sensations and reconstruct the object"s original shape. So, to make an object invisible, scientists have to keep waves from bouncing off it. And they have to make sure the object casts no shadow. Otherwise, the absence of reflected light on one side would give the object away. Invisibility isn"t possible yet with waves of light that the human eye can see. But it is now possible with microwaves. Like visible light, microwaves are a form of radiant energy. They are part of the electromagnetic spectrum (电磁波频谱), which also includes radio waves, infrared light, ultraviolet rays, X rays, and gamma rays. The wavelengths of microwaves are shorter than those of radio waves but longer than those of visible light. The scientists" new "invisibility device" is the size of a drink coaster and shaped like a ring. The ring is made of a special material with unusual ability. When microwaves (微波) strike the ring, very few bounce off it. Instead, they pass through the ring, which bends the waves all the way around until they reach the opposite side. The waves then return to their original paths. To a detector set up to receive microwaves on the other side of the ring, it looks as if the waves never changed their paths as if there were no object in the way! So, the ring is effectively invisible. When the researchers put a small copper loop inside the ring, it, too, is nearly invisible. However, the cloaking device and anything inside it do cast a pale shadow. And the device works only for microwaves, not for visible light or any kind of electromagnetic radiation. So, Harry Potter"s invisibility cloak doesn"t have any real competition yet.

单选题After Emily Dickinson retreated from the world at the age of twenty-six, she wrote more than one thousand poems.

单选题 The Teacher's Influence upon the Development of Attitudes Of all the areas of learning, the most important is the development of attitudes. Emotional reactions as well as logical thought processes affect the behavior of most people. "The burnt child fears the fire" is one instance: another is the rise of dictators like Hitler. Both these examples also point out the fact that attitudes stem from experience. In the one case the experience was direct and impressive: in the other it was indirect and accumulative. The Nazis were filled largely with the speeches they heard and the books they read. The classroom teacher in the elementary school is in a strategic position to influence attitudes. This is true partly because children acquire attitudes from those adults whose words they respect. Another reason, it is true that pupils often study somewhat deeply a subject in school that has only been touched upon at home or has possibly never occurred to them before. To a child who had previously acquired little knowledge of Mexico, his teacher's method of handling such a unit would greatly affect his attitude toward Mexicans. The media which the teacher can develop healthy attitudes are innumerable. Social studies (with special reference to races, beliefs and nationalities), science matters of health and safety, the very atmosphere of the classroom, these are a few of the fertile fields for the education of proper emotional reactions. However, when children come to school with undesirable attitudes, it is unwise for the teacher to attempt to change their feelings by scolding them. She can achieve the proper effect by helping them obtain constructive experiences. To illustrate, first grade pupils' afraid of policemen will properly alter their attitudes after a classroom chat with the neighborhood officer in which he explains how he protects them. In the same way, a class of older children can develop attitudes through discussion, research, outside reading and all day trips. Finally, a teacher must constantly evaluate her own attitudes, because her influence can be harmful if she has personal prejudices. This is especially true in respect to controversial issues and questions on which children should be encouraged to reach their own decisions as a result of objective analysis of the facts.

单选题阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 {{B}}Rescue Platform{{/B}} In the aftermath of the terrorist attacks on the World Trade Center, security experts are trying to develop new ways of rescuing people from burning skyscrapers. One idea is a platform capable of flying vertically and hovering in the air like a helicopter. The platform would rise up and down alongside a skyscraper and pick up people trapped in high stories. The idea for the vertical takeoff platform was hatched more than ten years ago by a Russian aerospace engineer, David Metreveli, who has since moved to Israel. Metreveli's design, called the Eagle, calls for two jet engines that turn four large horizontal propellers. The spinning of the propellers generates the necessary lift, or upward force, to raise the platform. The more power is supplied to the propellers, the higher the platform rises. Moving the platform sideways involves applying differing amounts of power to each propeller. Helicopters are now used in some cases to get people out of burning buildings. Escape baskets slung from them dangle beside the building for people to climb into. Unfortunately, the baskets cannot reach every floor of a building because the ropes from which they hang become unstable beyond a certain length. So far, Metreveli has built a small-scale model of the Eagle to test his idea. In the wake of September 11, he has been able to secure enough funding to start building a larger, 4-meter by 4- meter prototype, which he calls the Eaglet.

单选题In Russia today, the younger people are adapting far more readily to the Uturmoil/U of the emerging market system.

单选题Our journey was very slow because the train stopped {{U}}constantly{{/U}} at different village.

单选题What is the president's view on digital cameras and traditional ones?

单选题The thief Uran away/U with two overcoats and a jacket.

单选题A longjourney in cold weather is dreadfully tiring.A. unfortunatelyB. terriblyC. noticeablyD. predictably

单选题During the past ten years there have been {{U}}dramatic{{/U}} changes in the international situation. A.permanent B.powerful C.striking D.practical

单选题Every week the magazine presents the Uprofile/U of a well-known sportspersonality.

单选题 Vocational Education Vocational education refers to education for a particular occupation. Industrialized countries have seen a fall in demand for unskilled workers, and an increase in jobs in the professional, technical, commercial, and administrative sector. Vocational education is traditionally associated with trades and crafts: young people were apprentice to employers for a number of years and learned on the job. Today the focus has shifted from the workplace to secondary and higher education institutions, and from employers' to government provision and finance. Trainees in most occupations combine workplace training with study at a technical or academic institution. In the former Soviet Union, school and work were always strongly linked from primary school. Germany provides nine out of ten young people not entering higher education with vocational training, and training is planned from national down to locate level through joint committees of government representatives, employers, and trade unions. In some countries, skills are being grouped and "job families" created so that individuals can move between jobs with similar technical requirements. In others "competency-based education" is advocated to equip individuals with "transferable" as well as specific skills. In developing countries, where it is traditional for children to work from an early age, only a tiny proportion of students follow a formal vocational program, while the long specialist training of professionals such as doctors, lawyers, and engineers is a costly burden. Training places for technicians, nurses, teachers, and the essential workers are often limited. Worldwide, there is a slow but steady increase in the numbers of women training for occupations of influence in science, technology, law, and business. It is also becoming clear that one course of vocational education is not enough for a life time. Retraining, through continuing education is essential.

单选题The people of the coral island nations are unable to do anything substantial about the problem of global warming.

单选题Smoking is not {{U}}permitted{{/U}} in the office.

单选题On the contrary, the boy is such a courageous boy.A. foolishB. smartC. braveD. excellent

单选题 阅读下面这篇短文，短文后列出了7个句子，清根据短文的内容对每个句子作山判断。如果该句提供的是正确信息，请选择A项；如果该句提供的是错误信息，请选择B项；如果该句的信息文章中没有提及，请选择C项。 {{B}}El Nino{{/B}} While some forecasting methods had limited success predicting the 1997 El Nino a few months in advance, the Columbia University researchers say their method call predict large El Nino events up to two years in advance. That would be good news for governments, farmers and others seeking to plan for the droughts and heavy rainfall that El Nino can produce in various parts of the world. Using a computer the researchers matched sea-surface temperatures to later El Nino occurrences between 1980 and 2000 and were then able to anticipate El Nino events dating back to1857, using prior sea-surface temperatures. The results were reported in the latest issue of the journal Nature. The researchers say their method is not perfect, but Bryan C. Weare. a meteorologist at the University of California, Davis, who was not involved in the work, said it "suggests'El Nino is indeed predictable.'" "This will probably convince others to search around more for even better methods." said Weare. He added that the new method "makes it possible to predict El Nino at long lead.times." Other models also use sea-surface temperatures, but they have not looked as far back because they need other data, which is only available for recent decades, Weare said. The ability to predict the warming and cooling of the Pacitic is of immense importance. The 1997 El Nino, for example, caused an estimated $ 20 billion in damage worldwide, offset by beneficial effects in other areas, said David Anderson, of the European Centre for Medium Range Weather Forecasts in Reading England. The 1877 El Nino, meanwhile, coincided with a failure of the Indian monsoon and a famine that killed perhaps 40 million in India and China, prompting the development of seasonal forecasting, Anderson said. When El Nino hit in 1991 and 1997, 200 million people were affected by flooding in China alone, according to a 2002 United Nations report. While predicting smaller El Nino events remains tricky, the ability to predict larger ones should be increased to at least a year if the new method is confirmed. El Nino tends to develop between April and June and reaches its peak between December and February. The warming tends to last between 9 and 12 months and occurs every two to seven years The new forecasting method does not predict any major El Nino events in the next two years, although a weak warming toward the end of this year is possible. El Ninon. 厄尔尼诺现象 equatorial adj.赤道的 occurrence n. 发生 meteorologist n.气象学家 offset v. 抵销 lead adj. 提前的 monsoon n.季风 tricky adj.难以捉摸的

单选题{{B}}第二篇{{/B}} {{B}} Media and Current Events{{/B}} The media can impact current events. As a graduate student at Berkeley in the 1960s, I remember experiencing the events related to the People’s park that were occurring on campus. Some of these events were given national media coverage in the press and on TV. I found it in teresting to compare my impressions of what was going on with perceptions obtained from the news media. I could begin to see events of that time feed on news coverage. This also provided me with some healthy insights into the distinctions between these realities. Electronic media are having a greater impact on the people’s lives every day. People gather more and more of their impressions from representations. Television and telephone communications are linking people to a global village, or what one writer calls the electronic city. Consider the information that television brings into your home every day. Consider also the contact you have with others simply by using telephone. These media extend your consciousness and your contact. For example, the video coverage of the 1989 San Francisco earthquake focused on “live action” such as the fires or the rescue efforts. This gave the viewer the impression of total disaster. Television coverage of the Iraqi War also developed an immediacy. CNN reported events as they happened. This coverage was distributed worldwide. Although most people were far away from these events, they developed some perception of these realities. In 1992, many people watched in horror as riots broke out on a sad Wednesday evening in Los Angeles, seemingly fed by video coverage from helicopters. This event was triggered by the verdict (裁定) in the Rodney King beating. We are now in an age where the public can have access to information that enables it to make its own judgements, and most people, who had seen the video of this beating, could not understand how the jury (陪审团) was able to acquit (宣布无罪) the policemen involved. Media coverage of events as they occur also provides powerful feedback that influences events. This can have harmful results, as it seemed on that Wednesday night in Los Angeles. By Friday night the public got to see Rodney King on television pleading, “Can we all get along?” By Saturday, television seemed to provide positive feedback as the Los Angeles riot turned out into a rally for peace. The television showed thousands of people marching with banners and cleaning tools. Because of that, many more people turned out to join the peaceful event they saw unfolding (展开) on television. The real healing, of course, will take much longer, but electronic media will continue to be a part of that process.

单选题The committee comprises five persons. A. absorbs B. concems C. excludes D. involves

单选题The new Greenpeace card breaks down in a few months.