单选题Why does the author mention "Egypt's mighty pyramid builders"?

单选题 The New Technology Application On a more mundane level, third-generation mobile telephones, despite all the delays and the billions squandered on 3G licenses by telecom firms are still expected to offer consumers high-speed, always on mobile internet access, complete with video, in the next few years. Rapidly proliferating "wi-fi" networks already offer wireless access on a local basis. Tiny tracking chips called radio-frequency identification devices are being used as pet passports. Soon they will be small, powerful and cheap enough to be implanted into everything. Sensors of every kind, including video cameras, should also become much smaller and cheaper. Forrester Research, a technology consultancy, predicts that 14 billion such devices will be connected to the internet by 2005. How rapidly such a new technology is introduced will depend on a number of factors the state of the economy, the supply of investment capital and the appetite of consumers for new products or services. Fortunes will be made and lost many times over. But whatever happens, the power of computing .and communications look set to continue to grow, and its price to fall, at a steady rate for the next few decades. That will make it possible, at least in rich countries, to record most human interactions, wherever and whenever they take place, and to store and analyze this ocean of data at low cost. For the sake of argument, this survey will assume that we are heading towards a networked society of ubiquitous, mobile communication capable of constant monitoring. Whether this arrives in 20, 30 or 40 years does not really matter. The point is that the destination seems not merely possible, but probable, so it is not too soon to ask: What do we want this technology to do? The internet has already thrown up a host of legal and political conundrums, but, these are only a small foretaste of the dilemmas about privacy, security, intellectual property and the nature of government itself that will have to be faced over the coming decades. The debate has already begun. This survey will outline some of main issues and speculate on the way they are likely to go.

单选题John is {{U}}collaborating{{/U}} with Mary in writing an article

单选题Sometimes it is advisable to book hotels in advance.

单选题We have a responsibility to ensure our nation's continued prosperity and the most {{U}}sensible{{/U}} way to do this is by investment in basic scientific research. A. effective B. efficient C. significant D. reasonable

单选题These are their {{U}}motives{{/U}} for doing it. A. reasons B. excuses C. answers D. plans

单选题Throughout most of their lives. human beings perpetually learn and increase their mental capacities.

单选题 阅读下面的短文，文中有15处空白，每处空白给出4个选项。请根据短文的内容，从4个选项中选择1个最佳答案。 {{B}}A system to stop ships sinking{{/B}} A new computer system has been designed to stop ships sinking. The greatest danger to a holed vessel is that flooding of its compartments will make the {{U}}(51) {{/U}} unstable enough to capsize. It is estimated that nearly half the ship {{U}}(52) {{/U}} during the Second World War capsized because of loss of {{U}}(53) {{/U}}. Pacer System of Burlington, Massachusetts has now refined a system devised by a reserve U.S. Navy officer, Stephen Drabouski. The computer is programmed with every possible eventuality of flood damage. Once the actual damage is keyed into the computer the operator is told by the computer {{U}}(54) {{/U}} the implications are—and what can be done to re-establish the vessel. Trials on the American aircraft carrier USS Midway have {{U}}(55) {{/U}} that the re action time to damage can be cut to a fiftieth. An incident was simulated in which the ship was {{U}}(56) {{/U}} by two Exocet missiles causing flooding to 30 {{U}}(57) {{/U}} receipt of the flood damage information in the damage control centre to a full printout of damage, effects, {{U}}(58) {{/U}} countermeasures and an assessment of the result of the countermeasures. In a re-run of the incident {{U}}(59) {{/U}} the computer program the damage control officer took four and a quarter hours to establish the effects, of the damage and another four hours {{U}}(60) {{/U}} a decision could be taken on countermeasures. Although the system can be used to provide {{U}}(61) {{/U}} control officers with advice, they do not, of course, have to {{U}}(62) {{/U}} the information. Quite often the " {{U}}(63) {{/U}} solution" will be unacceptable for operational reasons. When that happens the system can be asked for alternatives or the operator {{U}}(64) {{/U}} interrogate the computer to find out what would happen if the officer's {{U}}(65) {{/U}} solution was put into action.

单选题In judging our work you should take into consideration the fact that we have been very busy recently. A. thought B. account C. mind D. brain

单选题 Stem Cell Therapy May Help Repair the Heart According to scientists in the USA, stem cell therapy may one day be able to repair the hearts of people with heart failure. Researchers at Pittsburgh University School of Medicine examined 20 patients who had severe heart failure and were going to have surgery. They injected stem cells into the parts of their hearts that were damaged. They then compared their hearts with those of people who had undergone surgery without having the stem cells injected into them (they had also suffered from severe heart failure). The patients who had the stem cells injected had hearts that were able to pump (用泵抽运) more blood than the others. According to Professor Robert Kormos, one of the researchers, these results could revolutionize heart treatment. Although previous studies had indicated that there might be a benefit, this is the first study that has actually proved that stem cell therapy can help the failing heart work better. All the patients in this study had hearts that could not pump blood properly. The scientists measured their ejection fraction (射血分数). It is a measure of heart performance; you measure how much blood is being pumped out by the left ventricle (心室). Healthy people's ejection fraction is about 55%. These patients had ejection fraction of under 35%. They all had by-pass surgery (搭桥手术) performed on them. Some of the patients had stem cells taken from their hip bones and injected into 25-30 sites in the damaged heart muscle. Six months later their ejection fraction rate was 46.1% while those who just had surgery but no stem cell injections averaged 37.2%. No side effects were reposed. Heart failure is a common problem all over the world. In the UK alone about 650,000 people suffer from heart failure every year. As the number of people suffering from heart failure increases in the world in general these findings are particularly significant. Current treatments relieve the symptoms. This new stem cell therapy actually repairs the damaged muscle in the heart and has the potential of curing the disease.

单选题The promised wage increase is being held back while it is examined by the government to see if it is greater than the law allows.

单选题Changes of Women's Role The role of women in Britain has changed a lot in this century, (51) in the last twenty years. The main change has been (52) giving women greater equality with men. Up to the beginning of this century, women seem to have trod (53) rights. They could not vote and were kept at home. (54) , as far as we know, most women were happy with this situation. Today, women in Britain certainly (55) more rights than they used to. They were (56) the vote in 1919. In 1970 a law was passed to give them an equal (57) of wealth in the case of divorce, (58) the Equal Pay Act gave them the right of equal pay with men for work of equal value in the same year. Yet (59) these changes, there are still great difference in status between men and women. Many employers seem to (60) the Equal Pay Act, and the average working women is (61) to earn only about half that a man earns for the same job. (62) a survey, at present, only one-third of the country's workers are (63) women. This small percentage is partly (64) a shortage of nurseries. If there were (65) nurseries, twice as many women might well go out to work.

单选题It"s a gorgeous day anyway.

单选题Although nobody {{U}}acknowledged{{/U}} his presence, Mr. Smith knew he had been recognized.

单选题She"s been deliberately ignoring him all day.

单选题{{B}}第二篇{{/B}} One-room schools are part of the heritage of the United States，and the mention of them makes people feel a longing for“the way things were．”One room schools are an endangered species(种类)，however．For more than a hundred years，one-room schools have been systematically shut down and their students sent away to centralized schools．As recently as 1930 there were 149，000 one-room schools in the United States．By 1970 there were 1，800．Today，of the nearly 800 remaining one-room schools，more than 350 are in Nebraska．The rest are spread through a few other states that have on their roadmaps wide-open spaces between towns． Now that there are hardly any left，educators are beginning to think that maybe there is something yet to be learned from one-room schools，something that served the pioneers that might serve as well today．Progressive educators have come up with new names like“peer-group teaching”and“multi-age grouping”for educational procedures that Occur naturally in the one-room schools．In a one-room school the children teach each other because the teacher is busy part of the time teaching someone else．A fourth grader can work at a fifth-grade level in math and a third-grade level in English without the bad name associated with being left back or the pressures of being skipped(超过)ahead．A youngster with a learning disability can find his or her own level without being separated from the other pupils．A few hours in a small school that has only one classroom and it becomes clear why so many parents feel that one of the advantages of living in Nebraska is that their children have to go to a one-room school．

单选题We reckoned there was only one man who is fit for the post.

单选题We're happy to {{U}}collaborate{{/U}} with you in the project. A. compete B. cooperate C. coordinate D. contend

单选题The teachers want to do away with cheating in their school.A. do credit toB. retainC. put an end toD. substitute for

单选题He is hesitating whether to quit the competition because of illness.A. give upB. put upC. set upD. take up