单选题We are so tired after one work on this program.

单选题She persevered in her ideas despite obvious objections raised by friends. A．persisted B．insisted C．resisted D．suggested

单选题Mad Scientist Stereotype Outdated Do people still imagine a physicist as a bearded man in glasses or has the image of the mad scientist changed? The Institute of Physics set out to find out whether the stereotype of a physics "boffin" (科学家) still exists by conducting a survey on shoppers in London. The people were asked to identify the physicist from a photograph of a line-up of possible suspects. 98 percent of those asked got it wrong. The majority of people picked a white male of around 60, wearing glasses and with a white beard. While this stereotype may have been the image of all average physicist fifty years ago, the reality is now very different since 1960 the number of young women entering physics has doubled and the average age of a physicist is now 31. The stereotype of the absent-minded scientist has lasted a long time because the media and Hollywood help promote the image of men in white lab coats with glasses sitting by blackboards full of equations (等式) or working with fizzing (嘶嘶响) test tubes. These stereotypes are really damaging to society. Very good school children are put off studying science because they don"t see people like themselves on television or in magazines doing science. They simply don"t relate to the media"s image of the mad scientist. This is one reason why fewer young people are choosing to do science at university. If we want to encourage more young people to study science subjects, we need to change this image of the scientist and make science careers more attractive. But we must also develop children"s interest in science. In an attempt to change this negative image, an increasing number of science festivals are being organized. Thousands of people from secondary schools are also encouraged to take part in the international wide science competitions of which the most popular are the national Science Olympiads. Winning national teams then get the opportunity to take part in the International Science Olympiads which are held in a different country every year. These events are all interesting for the young people who take part but they only involve a small proportion of students who are already interested in science. It seems that there is a long way to go before science becomes attractive as subjects like computer studies or fashion and design.

单选题Jack consumes a pound of cheese a day.

单选题{{B}}第二篇{{/B}} {{B}} New Foods and the New World{{/B}} In the last 500 years, nothing about people -- not their clothes, ideas, or languages -- has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree (可可树) by South American Indians. The Spanish introduced it to the rest of the world during the 1500's. And although it was very expensive, it quickly became fashionable. In London, shops where chocolate drinks were served became important meeting places. Some still exist today. The potato is also from the New World. Around 1600, the Spanish brought it from Peru to Europe, where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the "Potato Famine (饥荒) "of 1845-1846, and thousands more were forced to leave their homeland and move to America. There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world's largest grower of coffee, and coffee is an important crop in Colombia and other South American countries. But it is native to Ethiopia, a country in Africa. It was first made into a drink by Arabs during the 1400%. According to an Arabic legend, coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush. He tried one and experienced the "wide-awake" feeling that one third of the world's population now starts the day with.

单选题{{U}}In short{{/U}}, I am going to live there myself. A. In other words B. That is to say C. In a word D. To be frank

单选题She is sick. A．fat B．weak C．ill D．mad

单选题Computer and School Education There was a time when parents who wanted an educational present for their children would buy a typewriter, a globe or an encyclopedia set. Now those (51) seem hopelessly old-fashioned; this Christmas, there were a lot of personal computers under the tree. (52) that computers are the key to success, parents are also financially insisting that children (53) taught to use them in school-as early as possible. The problem for schools is that when it (54) computers, parents don't always know best. Many schools are (55) parental impatience and are purchasing hardware without sound educational planning so they can say, "OK, we've moved into the computer age." Teachers found themselves caught in the middle of the problem-between parent pressure and (56) educational decisions. Educators do not even agree (57) how computers should be used. (58) money is going for computerized educational materials (59) research has shown can be taught just as well with pencil and paper. (60) those who believe that all children should have access to computers, warn of potential dangers to the very young. The temptation remains strong largely because young children (61) so well to computers. First graders have been seen willing to work for two hours on math skills. Some have an attention span of 20 minutes. (62) school can afford to go into computing, and creates yet another problem: a division between the haves and have-nots. Very (63) parents are agitating (64) computer instruction in poor school districts, (65) there may be barely enough money to pay the reading teacher.

单选题The Development of PR The rise of multinational corporations, global marketing, new communications technologies, and shrinking cultural differences have led to an unparalleled increase in global public relations or PR. Surprisingly, since modern PR was largely an American invention, the U.S. leadership in public relations is being threatened by PR efforts in other countries. Ten years age, for example, the world's top five public relations agencies were American-owned. In 1991, only one was. The British in particular are becoming more sophisticated and creative. A recent survey found that more than half of all British companies include PR as part of their corporate planning activities, compared to about one-third of U. S. companies. It may not belong before London replaces New York as the capital of PR. Why is America lagging behind in the global PR race? Firstly, Americans as a whole tend to be fairly provincial and take more of an interest in local affairs. Knowledge of world geography, for example, has never been strong in this country. Secondly, American lag behind their European and Asian counterparts in knowing a second language. Less than 5 percent of Bur-son-Marshall's U.S. employees know two languages. Ogilvy and Mather has about the same percentage. Conversely, some European firms have half or more of their employees fluent in a second language. Finally, people involved in PR abroad tend to keep a closer eye on international affairs. In the financial PR area, for instance, most Americans read the Wall Street Journal. Overseas, their counterparts read the Journal as well as the Financial Times of London and The Economist, publications not often read in this country. Perhaps the PR industry might take a lesson from Ted Turner of CNN (Cable News Network). Turner recently announced that the word "foreign" would no longer be used on CNN news broadcasts. According to Turner, global communications have made the nations of the world so interdependent that there is no longer any such thing as foreign.

单选题I can no longer tolerate his actions.

单选题Animal's "Sixth Sense" A．tsunami (海啸) was triggered (引发) by an earthquake in the Indian Ocean in December, 2004. It killed tens of thousands of people in Asia and East Africa. Wild animals, (1) , seem to have escaped that terrible tsunami. This phenomenon adds weight to notions that they possess a "sixth sense" for (2) , experts said. Sri Lankan wildlife officials have said the giant waves that killed over 24, 000 people along the Indian Ocean island's coast clearly (3) wild beasts, with no dead animals found. "No elephants are dead, not (4) a dead rabbit. I think animals can (5) disaster. They have a sixth sense. They know when things are happening," H.D. Ratnayake, deputy director of Sri Lanka's Wildlife Department, said about one month after the tsunami attack. The (6) washed floodwaters up to 2 miles inland at Yala National Park in the ravaged (被毁坏的) southeast, Sri Lanka's biggest wildlife (7) and home to hundreds of wild elephants and several leopards (豹). "There has been (8) apparent evidence about dogs barking or birds migrating before volcanic eruptions (火山爆发) or earthquakes. But it has not been proven," said Matthew van Lierop, an animal behavior (9) at Johannesburg Zoo. "There have been no (10) studies because you can't really test it in a lab or field setting," he told Reuters. Other authorities concurred (同意) with this (11) . "Wildlife seem to be able to pick up certain (12) , especially birds ... there are many reports of birds detecting impending (迫近的) disasters," said Clive Walker, who has written several books on African wildlife. Animals (13) rely on the known senses such as smell or hearing to avoid danger such as predators (食肉动物). The notion of an animal "sixth sense"—or (14) other mythical power—is an enduring one which the evidence on Sri Lanka's ravaged (荒凉的) coast is likely to add (15) .

单选题These are their motives for doing it.

单选题The Greatest of Victorian Engineers In the hundred years up to 1860, the work of a small group of construction engineers carried forward the enormous social and economic change that we associate with the Industrial Revolution in Britain. The most important of these engineers was Isambard Kingdom Brunel, whose work in shipping, bridge-building, and railway construction, to name just three fields, both challenged and motivated his colleagues. He was the driving force behind a number of the hugely ambitious projects, some of which resulted in works which are still in use today. The son of an engineer, Brunel apprenticed with his father at an early age on the building of the Thames Tunnel. At the age of just twenty, he became engineer in charge of the project. This impressive plan to bore under the Thames twice suffered two major disasters when the river broke through into the tunnel. When the second breach (决口) occurred in 1872, Brunel was seriously injured during rescue operation and further work was halted. While recovering from his injuries, Brunel entered a design competition for a new bridge over the Avon Gorge near Clifton. The original judge of the competition was Thomas Telford, a leading civil engineer of his day, who rejected all entries to the competition in favor of his own design. After considerable scandal, a second contest was held and Brunel"s design was accepted. For reasons of funding, however, exacerbated (加剧) by social unrest in Bristol, the project was abandoned in 1843 with only the towers completed. After Brunel"s death, it was decided to begin work on it again, partly so that the bridge could form a fitting memorial to the great engineer. The entire structure was finally completed in 1864. Today, the well-known Clifton Suspension Bridge is a symbol of Bristol, just as the Opera House is of Sydney. Originally intended only for horse-drawn traffic, the bridge now bears over four million motor vehicles a year.

单选题9 The outlook from the top of the mountain is breathtaking. A．view B．sight C．look D．point

单选题Psychologists have done extensive studies of how well patients {{U}}comply with{{/U}} doctors’ orders.

单选题1. Walking Robot Carries a Person The first walking robot capable of carrying a person unveiled on Friday in Tokyo, Japan. Its creators at Waseda University in Tokyo and the Japanese robotics company Tmsuk hope their two-legged creation will one day enable wheel-chair users to climb up and down stairs and assist the movement of heavy goods over uneven terrain. The bakery-powered robot, code-named WL-16, is essentially an aluminium (铝) chair mounted on two sets of telescopic (套迭的, 伸缩的)poles. The poles are bolted to flat plates which act as feet. WL-16 uses 12 actuators to move forwards, backwards and sideways while carrying an adult weighing up to 60 kilograms(130 pounds). The robot can adjust its posture and walk smoothly even if the person it is carrying shifts in the chair. At present it can only step up or down a few millimeters, but the team plans to make it capable of dealing with a normal flight of stairs. "I believe this bipedal robot, which I prefer to call a two-legged walking chair rather than a wheel-chair, will eventually enable people to go up and down the stairs," said Atsuo Takanishi, from Waseda University. "We have had strong robots for some time but usually they have been manipulators, they have not been geared to carrying people around," says Ron Arkin, at the Georgia Institute of Technology and robotics consultant for Sony. "But I don't know how safe and how user-friendly WL-16 is." Tmsuk chief execut, ive Yoichi Takamoto argues that bipedal or multi-legged robots will be more useful than so-called "caterpillar models" for moving over uneven ground. WL-16's normal walking stride measures 30 centimetres, but it can stretch its legs to 136 cm apart, The prototype is currently radio-controlled, but the research team plans to equip it with a stick-like controller for the user in future, Takanishi said, it will take "at least two years" to develop the WL-16 prototype into a working model. Smaller, ground-hugging robots have been developed to pass across tricky terrain. One maggot-like device uses a magnetic fluid to pulse its way along while another snake-like robot uses smart software to devise new movement strategies if the landscape takes its toll on any one part. One ball-shaped robot even uses a leap-and-bounce approach to travel over bumpy territory. But none of these are big or strong enough to carry a person too.

单选题The effect was temporary—temperatures started rising again after a year or so. But scientists began to wonder if the volcano hadn't revealed a possible weapon against climate change. It takes only a back-of-the-envelope calculation to see that it would be possible to do artificially what the mountain did naturally. Ajudicious (明智的, 审慎的) application of sulfur dioxide (二氧化硫) to the upper atmosphere ,which could be accomplished by launching the gas from rockets, spraying it from high-altitude planes or releasing it from a big chimney, would have an almost immediate impact on temperature. And it would cost a thousand times less than even the most optimistic scenarios for cutting emissions. A small group of scientists began looking into how this kind of geo-engineering could be done most efficiently and with the fewest side effects. Sulfur dioxide could be applied to the upper atmosphere in all the following ways EXCEPTA. launching the gas from rockets.B. releasing the gas from a big chirmley.C. producing the gas from volcanoes.D. spraying the gas from high-altitude planes.

单选题TapeStore: A．New Tape Storage System TapeStore is a new kind of tape storage system which can store up to 6,000 computer tapes. No other tape storage system can hold as many computer tapes as TapeStore. The tapes look exactly like video cassettes. Many hundreds of data files can be stored on each tape, up to a maximum of 500 million bytes (字节) of data. If you stored the same amount of information on paper, you would need nearly 4.5 billion printed pages. The machine is a tall black box with a mechanical arm. The machine is 2.5 metres high and 3.0 metres wide. This is how it works. Each tape has a code printed on it. You feed the code number into TapeStore, which then looks for the code. As soon as TapeStore locates the code, the arm reaches in and pulls out the tape. The system is very fast. It takes the mechanical arm about 10 seconds to find the tape it is looking for. The machine then searches the tape to extract (提取) the required file, and this takes less than a minute. A．human technician would have to locate and remove the tape by hand, and could take at least an hour to find the right file on the tape. Some of the world's biggest companies, including banks, insurance companies, airlines, telephone companies, utilities and computer centres, have bought the system. They like it particularly because the system guarantees the security of their data. TapeStore was originally developed in Canada and is now being marketed worldwide. In Europe alone, 750 have already been installed at a cost of 480,000 dollars each.

单选题These products are inferior to those we brought last year.

单选题Gunpowder was used extensively in firearms Uprior/U to 1990.