单选题Traveler: When does the next bus for London leave?
Ticket officer: There"s one leaving in 30 minutes, Gate 2.
Traveler: ______
单选题Help Wanted Ad Outstanding opportunity with local real estate corporation. Requires strong background in real estate, financing. Some legal training helpful. Prefer candidate with M. A. and two or more years of successful real estate experience. Broker's license required. Salary range $50,000—$80, 000 yearly in accordance with education and experience. Begin immediately. Interviews will be conducted Tuesday and Thursday, June 10 and 12. Call for an appointment 243-11522, or send a letter of application and resume to: Personnel Department Executive Real Estate Corporation 500 Capital Avenue Lawrence, Kansas 67884
单选题The Japanese dollar-buying make traders eager to ______ dollars in fear of another governmental intervention.
单选题For the first time, stem cells purified from fat have been used to heal an injury in a living animal. Michael Longaker of Stanford University in California and his team showed in mouse experiments that so-called adipose derived adult stromal (ADAS) cells purified from a rodent's belly fat could be coaxed to heal a skull fracture too large to mend by itself. The power of ADAS cells to transform into bone, cartilage and even neurons has been studied for years in test tubes. But Jeffrey Gimble, who studies human ADAS cells at Louisiana State University in Baton Rouge says Longaker's report is an important step forward. "Actually repairing a defect in an animal model had never been done. This is an excellent study." If the same technique works in humans, these cells could be coaxed to mend broken bones and correct other defects in tens of thousands of surgical procedures each year in which bone grafts and prosthetics are now necessary. Longaker's group tested the ability of ADAS cells to heal four-millimetre-long fractures surgically-induced in the skulls of mice. In 12 weeks, the cells filled 70 to 90 per cent of the defects, while untreated animals had only unorganized bone formation in less than 10 per cent of the fractures. No extreme genetic manipulation or treatment of the cells was necessary. ADAS cells began manufacturing bone when they were simply laid onto a biodegradable polymer that contained apatite, a compound that naturally occurs in bone. Furthermore, the ADAS cells performed as well as bone marrow stromal cells, which would seem to be more natural architects of bone. It remains to be seen whether human ADAS cells will build bone as effectively. But researchers are excited about the prospects. Human bone marrow stromal cells are already being used in clinical trials as sources of skeleton-building material, but the ADAS cells may have some significant advantages. Longaker reports that ADAS cells grow seven times faster than the bone marrow cells in the laboratory. And it is relatively easy to harvest more than a litre of fat tissue, even from patients who are not obese. Bone marrow is much less plentiful and must be removed in a painful surgical procedure. Of course, liposuction itself is not a pleasant operation. But according to the American Society of Plastic Surgeons, more than 300,000 people volunteered to have the procedure in 2003 simply for cosmetic reasons. "If the procedure was the first step to healing broken bones or replacing other tissue its popularity could only grow," says Gimble. "Just think of that./
单选题According to ad B evening dinner is available ______.
单选题Global warming may or may not be the great environmental crisis of the 21st century, but— regardless of whether it is or isn't — we won't do much about it. We will argue over it and may even, as a nation, make some fairly solemn-sounding commitments to avoid it. But the more dramatic and meaningful these commitments seem, the less likely they are to be observed. A1 Gore calls global warming an "inconvenient truth," as if merely recognizing it could put us on a path to a solution. But the real truth is that we don't know enough to relieve global warming, and — without major technological breakthroughs — we can't do much about it. From 2003 to 2050, the world's population is projected to grow from 6.4 billion to 9.1 billion, a 42% increase. If energy use per person and technology remain the same, total energy use and greenhouse gas emissions(mainly, CO2) will be 42% higher in 2050. But that's too low, because societies that grow richer use more energy. We need economic growth unless we condemn the world's poor to their present poverty and freeze everyone else's living standards. With modest growth, energy use and greenhouse emissions more than double by 2050. No government will adopt rigid restrictions on economic growth and personal freedom (limits on electricity usage, driving and travel) that might cut back global warming. Still, politicians want to show they're "doing something." Consider the Kyoto Protoco(京都议定书). It allowed countries that joined to punish those that didn't. But it hasn't reduced CO2 emissions(up about 25% since 1990), and many signatories(签字国) didn't adopt tough enough policies to hit their 2008—2012 targets. The practical conclusion is that if global warming is a potential disaster, the only solution is new technology. Only an aggressive research and development program might find ways of breaking our dependence on fossil fuels or dealing with it. The trouble with the global warming debate is that it has become a moral problem when it's really an engineering one. The inconvenient truth is that if we don't solve the engineering problem, we're helpless.
单选题______ wealthy does not necessarily mean that a man is greedy. A. For the reason that he is B. The reason of being C. Just because he is D. That he is
单选题The new currency will get into ______ soon.
单选题Which of the following is not TRUE of the investigation?
单选题 I have an infatuation (迷恋) with autumn. The colors
of the season, and the smells, havealways thrilled me. I have always found joy
in this time of year. The last few autumns of my life,however, I recollect in
shades of gray rather than cheerful oranges and yellows. When I
became a single mother, every aspect of life took on new meaning. Since I was
usedto carrying out most of the parental duties without much help during my
marriage, I truly did notforesee how different parenting would become after the
marriage was over. But suddenly I realized Iwas a statistic. The daily routine
was not changed so much; it was the angle at which I had begunto look at
life. I believed my ex-husband's lawyer was tracking every
grade the children made, and I wasunder a microscope in this new town where the
children and I moved our "broken home." Ifeared having to eventually
establish my family with each new teacher and each new term as asingle-parent
family. I just wanted to be us again, without the stigma (特征) of the label
thatput on us. During those few gray years, I would reassure
myself that soon things would be better, andthat I would someday be able to feel
whole again. There is no mathematical equation of adultsproportioned to children
to equal a stable, loving family. Every family has its strengths. In
fact,studies show that in families who read together, eat together and
communicate openly, childrenare likely to succeed academically, as well as
socially and emotionally. I am sure these habits arejust as effective when
practiced in single-parent families. I realize now that I am not a statistic.
Weare an active, vital family in this charming community, where we are not
marked by any stigma ofany statistics of any focus groups. We
are given opportunity, all of us. We are surrounded by beauty and immersed
inpossibility. There is joy to be found here, in what we see around us and
in creating our ownrendition of how we want to be seen. There is strength and
grace in our own willingness to breakfree from conformity without falling behind
the barriers of self--imposed limitations or preconceivednotions of where we
should fit in this world according to research.
单选题It's no use ______ with him. You might as well argue with a stone wall. A. arguing B. of arguing C. in arguing D. to argue
单选题
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单选题Once the 12 Girls Band became popular, similar groups predictably starting popping up. Musicat and Beautiful Youth 18 were formed last year. Both feature now-familiar formulas of attractive young women playing different instruments in songs that combine modem music with classic Chinese tunes. Yet they add to the mix by throwing in song, dance and even acrobatics. In an interview, noted music critic Jin Zhaojun said the gift band phenomenon was not new to China, as similar acts appeared in the 1980s. However, the undying rule is that to be successful, bands have to have a novel look. "The 12 Girls Band was the first group to give big live shows and showy creativity in how they present their performances. The Beijing Red Poppy Ladies Percussion group, formed in 1999, has made a name for itself because they are the only band that exclusively plays drams and percussion instruments. Bands that don't have 'a thing' are sure to die fast," Jin said.
单选题If you have www. chinadaily. com. cn /cn/bdu, you can get in touch with BDU by______.
单选题
单选题It remains to be seen whether the reserves of raw materials in the year 2000 will be sufficient to supply a world economy which will have grown by five hundred percent. Southeast Asia alone will have an energy consumption five times greater than that of Western Europe in 1970. Incidentally, if the underdeveloped countries started using up petrol at the same rate as the industrialized areas, then world reserves would be exhausted by 1990. All this only goes to show just how important it is to set up a plan to conserve and divide up fairly natural resources on a worldwide scale. This is a matter of life and death because world population is expanding at an incredible rate. By the middle of the next century population will expand every year by as much as it did in the first 1,500 years after Christ. In the southern, poor parts of the globe, the figures are enough to make your hair stand on end. Even supposing that steps are taken to stabilize world population in the next fifty years, the number of inhabitants per square kilometer will increase by from 4 in the United States to 140 in South East Asia. What can we do about it? In the first hypothesis we do nothing. By the year 2000, the southern parts of the world would then have a population greater than the total world population today. Alternately we could start acting right now to bring birth rate under control within fifteen years so that population levels off. Even then the population in the southern areas would not stop growing for seventy-five years. And the population would level off at something like twice today's figure. Finally, we could wait ten to twenty years before taking action. If we wait ten years the population of the southern area would stabilize at 3,000 million. Even today the number of potential workers increases by 350,000 people per week. By the end of the century this figure will reach 750,000; in other words, it will be necessary to find work for 40 million people per year--not to speak of food. What this means in practical terms we can scarcely imagine. But clearly if we do nothing, nature will solve the problem for us. But at what cost!
单选题Customer: ______if you'd serve me as quickly as possible as I've got an appointment at two fifteen.Waiter: I'll do my best, Madam.
单选题Bill Gates, the billionaire Microsoft chairman without a single earned university degree, is by his success raising new doubts about the worth of the business world"s favorite academic title: the MBA (Master of Business Administration). The MBA, a 20th-century product, always has borne the mark of lowly commerce and greed (贪婪) on the tree-lined campuses ruled by purer disciplines such as philosophy and literature. But even with the recession apparently cutting into the hiring of business school graduates, about 79, 000 people are expected to receive MBAs in 1993. This is nearly 16 times the number of business graduates in 1960, a testimony to the widespread assumption that the MBA is vital for young men and women who want to run companies some day. "If you are going into the corporate world it is still a disadvantage not to have one,"said Donald Morrison, professor of marketing and management science. "But in the last five years or so, when someone says, "Should I attempt to get an MBA", the answer a lot more is: It depends. " The success of Bill Gates and other non-MBAs, such as the late Sam Walton of Wal-Mart Stores Inc., has helped inspire self-conscious debates on business school campuses over the worth of a business degree and whether management skills can be taught. The Harvard Business Review printed a lively, fictional exchange of letters to dramatize complaints about business degree holders. The article called MBA hires "extremely disappointing" and said "MBAs want to move up too fast, they don"t understand politics and people, and they aren"t able to function as part of a team until their third year. But by then, they"re out looking for other jobs. " The problem, most participants in the debate acknowledge, is that the MBA has acquired an aura (光环) of future riches and power far beyond its actual importance and usefulness. Enrollment in business schools exploded in the 1970s and 1980s and created the assumption that no one who pursued a business career could do without one. The growth was fueled by a backlash (反冲) against the anti-business values of the 1960s and by the women"s movement. Business people who have hired or worked with MBAs say those with the degrees often know how to analyze systems but are not so skillful at motivating people. "They don"t get a lot of grounding in the people side of the business," said James Shaffer, vice-president and principal of the Towers Perrin management consulting firm. (419 words)
单选题
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单选题It wasn’t such a desirable air conditioner ______ the advertisement had promised us.