单选题Many people believe that viruses cannot possibly be of importance in human cancer because ______. A. they are innocuous agencies B. they are the causative agents of most human cancer C. they seem to be infections to many people D. they are generally thought to be relevant to most cancer in man

单选题Such word had all of us ______ in sadness.

单选题[此试题无题干]

单选题Discoveries in science and technology are thought by " untaught minds" to come in blinding flashes or as the result of dramatic accidents. Sir Alexander Fleming did not, as legend would have it, look at the mold(霉)on a piece of cheese and get the idea for penicillin there and then. He experimented with antibacterial substances for nine years before he made his discovery. Inventions and innovations almost always come out of laborious trial and error. Innovation is like soccer; even the best players miss the goal and have their shots blocked much more frequently than they score. The point is that the players who score most are the ones who take most shots at the goal — and so it goes with innovation in any field of activity. The prime difference between innovation and others is one of approach. Everybody gets ideas, but innovators work consciously on theirs and they follow them through until they prove practicable or otherwise. What ordinary people see as fanciful abstractions, professional innovators see as solid possibilities. "Creative thinking may mean simply the realization that there's no particular virtue in doing things the way they have always been done, " wrote Rudolph Flesch, a language authority. This accounts for our reaction to seemingly simple innovations like plastic garbage bags and suitcases on wheels that make life more convenient: "How come nobody thought of that before?" The creative approach begins with the proposition that nothing is as it appears. Innovators will not accept that there is only one way to do anything. Faced with getting from A to B, the average person will automatically set out on the best-known and apparently simplest route. The innovator will search for alternate courses, which may prove easier in the long run and are bound to be more interesting and challenging even if they lead to dead ends. Highly creative individuals really do march to a different drummer.

单选题In problem solving programs, ______. A．game-playing is the center of all the programs B．AI programs can not think in the way human beings do C．if you often play games, your mathematics can be increased rapidly D．some people are told to find solutions

单选题{{B}}D{{/B}} {{B}} English as a Foreign Language{{/B}} Who taught you to speak English? Your parents, while you were a young child? Your teachers at school? Perhaps even the BBC as a grown-up. Whoever it was, somehow you have developed an understanding of what is rapidly becoming a truly global language. There are now about 376 million people who speak English as their first language, and about the same number who have learnt it in addition to their mother tongue. There are said to be one billion people learning English now and about 80% of the information on the Internet is in English. Is this a good thing, or a bad thing? Should we celebrate the fact that more and more of us can communicate, using a common language, across countries and cultures (文化)? Or should we worry about the dangers of "mono-culturalism", a world in which we all speak the same language, eat the same food and listen to the same music? Does it matter if an increasing number of people speak the same language? On the contrary (相反), I would have thought—although I have never accepted the argument that if only we all understood each other better, there would be fewer wars. Ask the people of India (where many of them speak at least some English) and Pakistan (the same situation with India)… If we all speak English, will we then all start eating McDonalds hamburgers? Surely not. If English becomes more dominant(占主导地位的) ,will it kill other languages? I doubt it. When I travel in Africa or Asia, I am always surprised by how many people can speak not only their own language but often one or more other related languages, as well as English and perhaps some French or German as well. When we discussed this on Talking Point a couple of years ago, we received a wonderfully poetic email from a listener in Ireland. "The English language is a beautiful language. Maybe it's like a rose," he said. "But who would ever want their garden just full of roses?" Well, I love roses, and I think they make a beautiful addition to any garden. But the way I see it, just by planting a few roses, you don't necessarily need to pull out everything else. If more and more people want to plant English roses, that's fine by me.

单选题Apples are ______ in summer and cost a lot.

单选题The statement"... but made a vast number of 35-year-olds redundant" in the last paragraph refers to the fact that?

单选题In the United States today, coffee is a more popular drink (1) tea, but tea played (2) interesting part in the history of the United States. Before they won their (3) from Britain, the colonists were forced to (4) taxes on many goods imported into America. The tax money was (5) to support colonial governors and officials sent to the colonies by the British. In 1770 the British Prime Minister had repealed most of the taxes, but King George (6) on retaining the tax (7) tea. The King saw the tax as a (8) of the British right to tax the colonies. American merchants (9) smuggled nine-tenths of America's tea into the country and (10) paying the taxes. (11) the tax savings, the price of tea remained expensive due. to (12) shipping costs. When the British Parliament (13) a new law which would allow British companies to import tea more (14) than American shipping companies, the (15) were alarmed and they (16) a protest. In Boston citizens and merchants, who (17) disguised as Indians, boarded a British ship and (18) ＄15000 worth of tea into the harbor. This protest (19) Great Britain is known as the Boston Tea Party. It was one of the earliest acts of (20) against British rule.

单选题Robert is said ______ abroad, but I dont know what country he studied in. A．to have studied B．to study C．to be studying D．to have been studying

单选题Who to believe? Nokia or Ericsson? IBM or Sun Microsystems? Microsoft or Siebel? Rarely have the fortunes of technology companies appeared to differ so widely. Nokia, the world's largest maker of mobile phones, this week reported better-than-expected sales for the latest quarter. holding out the prospect that its market share would soon reach new highs. By contrast, Ericsson, a rival, was full of gloom. Reporting bigger losses than expected, the company said that sales of its mobile phones were likely to tumble by 20% this year. Motorola, another maker of mobile phones, is in a similar boat. On October 15th, the company reported a return to profit in its most recent period after a run of losses, but lowered its forecasts for the rest of the year and for 2003. Demand in wireless, broadband and semiconductors continued to slow, said the company. Unimpressed, investors marked down Motorola's shares to a ten-year low. The pattern of haves and have-nots is repeated in software too. While Microsoft was in chipper mood this week—revelling in a 26% increase in sales and a doubling of its profits after tax for the quarter to the end of September—Siebel Systems and PeopleSoft, two of America's leading suppliers of business software, were down in the dumps. While PeopleSoft managed a modest profit, Siebel reported a loss for the last quarter and said it expected the present quarter to be equally tough. Despite (or because of) their contrasting fortunes, Microsoft and Siebel announced a joint marketing deal on October 21st: Microsoft is to sell Siebel's customer-management software through. NET, its web-services product. Why are some companies doing better than others? One reason is that, now more than ever. those that are competitive seem to be punishing those that are not. Nokia has stretched its lead over Ericsson which, in addition to lower sales of mobile phones, has suffered from the severe fall in demand for telecoms infrastructure, its biggest business. There was. however, some good news for Ericsson's shares on October 18th, when the company said that the infrastructure unit came close to breaking even in the most recent quarter. Cost-cutting has also helped SAP, Europe's largest developer of business software, has reduced its expenses by 8%. As a result, its margins have improved a lot compared with those of its competitors. Microsoft has employed different tactics. It has capitalized on customers' fears that the cost of upgrading their software, such a s the company's Windows XP operating system, could climb. Many have rushed to buy now in case prices rise. In tune with the times, Microsoi't is also keen to demonstrate how its products can save its customers money. Understandably, this is winning its sales.

单选题______knows the fact should report it to the manager.

单选题The wood was so rotten that, when we pulled, it ______ into fragments. A. broke away B. broke off C. broke up D. broke through

单选题{{B}}Passage Three{{/B}} Is Wal-Mart going wobbly? Over the past couple of weeks, America's largest company--linchpin of the low-wage, no-benefit economy that is increasingly the norm in America--has announced some surprising reversals of course. In a series of speeches and interviews, chief executive H. Lee Scott unveiled four initiatives that he clearly hopes will polish the company's increasingly tarnished image. Wal-Mart, he said, will shift to more environmentally responsible practices--demanding better packaging of its products. It will offer more affordable health insurance to its employees, cutting the monthly premium in some cases to just ＄11. It will monitor the environmental and health and safety practices of its foreign suppliers. And it will lobby for a higher federal minimum wage. Scott's timing is anything but accidental. The sweatshop conditions in which thou-sands of employees of Wal-Mart's suppliers routinely work, and the depressive effect that Wal-Mart has on working-class living standards here in the United States, are receiving increasing scrutiny--enough to impede the company's growth. Wal-Mart's at-tempts to open stores in the major cities of the Northeast and West Coast have been largely checked by a coalition of fearful and irate unions, smaller retailers, churches and liberal activists. Wal-Mart's stock is down 13 percent this year. And worse is still to come. So the leopard realized it was time to change its spots-up to a point. Only 44 percent of Wal-Mart's nearly 1. 3 million U.S. employees are covered under its health insurance plan. Now the company says it will make its insurance more affordable. Of all Scott's commitments, the one that does merit belief is his out-of-the-blue declaration of support for a higher minimum wage. For Wal-Mart is bumping up against a serious problem at least partly of its own making: Because it pitches its products to a disproportionately low-income client, its revenue rises and falls with the fortunes of the lower end of the American working class. And those fortunes these days are anything but bright. The coming crunch in heating oil prices, the decimation of American manufacturing, the steady decline of median family incomes over the past several years, the failure to raise the federal minimum wage since 1997--all these are combining to limit the ability of Wal-Mart shoppers to buy as much as they used to. Wal-Mart, could, of course, raise its workers' wages, but Scott has dismissed that out of hand. So now it's the feds' responsibility to rescue Wal-Mart from the consequences of the low-wage, low-consumption economy that Wal-Mart, with such fanatical devotion, has created. For, in Wal-Mart's America, it's not clear that even Wal-Mart can thrive.

单选题She lost consciousness due to hunger. When she ______, she found herself in a hospital.

单选题TV series Where Are We Going, Dad have made an_______on kids since it was broadcast n Hunan TV.