单选题Traditionally, women have lagged behind men in adoption of Internet technologies, but a study released yesterday found that women under age 65 now outpace men in Internet usage. The report, "How Women and Men Use the Internet," examined use by both sexes, looking at what men and women are doing online as well as their rate of adopting new Web-based technologies. "I think the real interesting story is the young women, because that is the one age cohort where there are many more women online," said Deborah Fallows, who wrote the report based on findings from surveys conducted over the past five years. "The younger women are just much more comfortable with the Internet." The report found that 86 percent of women ages 18 to 29 were online, compared with 80 percent of men in the same age group. Among African Americans, 60 percent of women are online, compared with 50 percent of men. In other age groups, the disparity is only slight, with women outpacing men by 3 percentage points. However, among the older group, those age 65 and older, 34 percent of men are online, compared with 21 percent of women. It's enough of a disparity, Fallows said, to keep men in the overall lead in Internet usage, 68 percent to 66 percent. Men tend to use the Web for information and entertainment--getting sports scores and stock quotes and downloading music--while women tend to be heavier users of mapping and direction services, and communication services such as e-mail. And, in general, men are more likely to be early adopters of technology than women, the survey found. A separate survey released earlier this week seemed to underscore the finding of the report. Of those who listen to podcasts distributed over the Internet, 78 percent are men and 22 percent are women. "With podcasting just over a year old, the current maleness of the podcast audience at the aggregate level is consistent with gender usage trends of the early Web." Mark McCrery, cofounder and chief executive of Podtrac, said in a statement. Over time, however, there likely will be "a more balanced gender composition of the podcast audience," he said. Fallows agreed but also said that the disparity between the sexes among younger people was especially interesting because it could shape the way the general population uses technology and the Web in the future. "It's hard to say where that will settle," she said. "I imagine things will even out over time, because there is so much for everyone online./

单选题A ______ of soap and two brightly colored towels were left beside the bath, then the woman smiled politely at Nicole and withdrew carefully from the room.

单选题Sometimes my husband ______ so loudly, it keeps me awake at night.

单选题Coach Green allowed John to join the basketball team although, ______, he was not tall enough.

单选题The parents who speak ______ may cause their children to become confused.

单选题Can electricity cause cancer? In a society that literally runs on electric power, the very idea seems preposterous. But for more than a decade, a growing band of scientists and journalists has pointed to studies that seem to link exposure to electromagnetic fields with increased risk of leukemia and other malignancies. The implications are unsettling, to say the least, since everyone comes into contact with such fields, which are generated by everything electrical, from power lines and antennas to personal computers and micro-wave ovens. Because evidence on the subject is inconclusive and often contradictory, it has been hard to decide whether concern about the health effects of electricity is legitimate—or the worst kind of paranoia. Now the alarmists have gained some qualified support from the U. S. Environmental Protection Agency. In the executive summary of a new scientific review, released in draft form late last week, the EPA has put forward what amounts to the most serious government warning to date. The agency tentatively concludes that scientific evidence " suggests a casual link" between extremely low-frequency electromagnetic fields—those having very longwave-lengths—and leukemia, lymphoma and brain cancer. While the report falls short of classifying ELF fields as probable carcinogens, it does identify the common 60-hertz magnetic field as " a possible, but not proven, cause of cancer in humans. " The report is no reason to panic—or even to lost sleep. If there is a cancer risk, it is a small one. The evidence is still so controversial that the draft stirred a great deal of debate within the Bush Administration, and the EPA released it over strong objections from the Pentagon and the White House. But now no one can deny that the issue must be taken seriously and that much more research is needed. At the heart of the debate is a simple and well-understood physical phenomenon: When an electric current passes through a wire, it generates an electromagnetic field that exerts forces on surrounding objects. For many years, scientists dismissed any suggestion that such forces might be harmful, primarily because they are so extraordinarily weak. The ELF magnetic field generated by a video terminal measures only a few milligauss, or about one-hundredth the strength of the earth's own magnetic field. The electric fields surrounding a power line can be as high as 10 kilovolts per meter, but the corresponding field induced in human cells will be only about 1 millivolt per meter. This is far less than the electric fields that the cells themselves generate. How could such minuscule forces pose a health danger? The consensus used to be that they could not, and for decades scientists concentrated on more powerful kinds of radiation, like X-rays, that pack sufficient wallop to knock electrons out of the molecules that make up the human body. Such "ionizing" radiations have been clearly linked to increased cancer risks and there are regulations to control emissions. But epidemiological studies, which find statistical associations between sets of data, do not prove cause and effect. Though there is a body of laboratory work showing that exposure to ELF fields can have biological effects on animal tissues, a mechanism by which those effects could lead to cancerous growths has never been found. The Pentagon is for from persuaded. In a blistering 33-page critique of the EPA report, Air Force scientists charge its authors with having "biased the entire document" toward proving a link. "Our reviewers are convinced that there is no suggestion that(electromagnetic fields)present in the environment induce or promote cancer," the Air Force concludes. "It is astonishing that the EPA would lend its imprimatur on this report. " Then Pentagon's concern is understandable. There is hardly a unit of the modern military that does not depend on the heavy use of some kind of electronic equipment, from huge ground-based radar towers to the defense systems built into every warship and plane.

单选题Freud derived psychoanalytic knowledge of childhood indirectly; he ______ childhood processes from adult memory.

单选题The distance between the Earth and the Sun may be said to be______.(2003年南开大学考博试题)

单选题Perhaps the most striking quality of satiric literature is its freshness, its originality of perspective. Satire rarely offers original ideas. Instead.it presents the familiar in a new form. Satirists do not offer the world new philosophies. What they do is look at familiar conditions from a perspective that makes these conditions seem foolish, harmful, or affected. Satire jars us out of complacence into a pleasantly shocked realization that many of the values that we unquestionably accept are false. Don Quixote makes chivalry seem absurd;Brave New World ridicules the pretensions of science; A Modest Proposal dramatizes starvation by advocating cannibalism. None of these ideas is original. Chivalry was suspect before Cervantes, humanists objected to the claims of pure science before Aldous Huxley, and people were aware of famine before Swift It was not the originality of the idea that made these satires popular. It was the manner of expression, the satire method, that made them interesting and entertaining. Satires are read because they are aesthetically satisfying works of art, not because they are morally wholesome or ethically instructive. They are stimulating and refreshing because with commonsense briskness they brash away illusions and secondhand opinions. With spontaneous irreverence, satire rearranges perspectives, scrambles familiar objects into incongruous combination, and speaks in a personal idiom instead of abstract platitude. Satire exists because there is need for it It has lived because the readers appreciate a refreshing stimulus, an irreverent reminder that they live in a world of platitudinous thinking, cheap moralizing, and foolish philosophy. Satire serves to prod people into an awareness of truth, though rarely to any action on behalf of truth. Satire tends to remind people that much of what they see, hear, and read in popular media is hypocritical .sentimental, and only partially true. Life resembles in only a slight degree the popular image of it Soldiers rarely hold the ideals that movies attribute to them, nor do ordinary citizens devote their lives to unselfish service of humanity. Intelligent people know these things but tend to forget them when they do not hear them expressed.

单选题As the core of the management board, he can always come up with______ideas to promote the corporation's marketing strategies.(2007年3月中国科学院考博试题)

单选题The new secretary has written a remarkably______report within a few hundred words but with all the important details included. A. concise B. brisk C. precise D. elaborate

单选题it is generally thought that as teachers work with students, psychology course work is ______ to teacher-training.

单选题The author thinks that psychology is to ______.

单选题When prices slowly decline and unemployment increases, you know that a ______ occurs.

单选题At the moment she is ______ the netball match between the Japanese team and the Cuban team over at the playing field.

单选题Remember to ask for a______ of quality for the consumer goods; otherwise they will not of- fer any maintenance.

单选题He finally agreed to sign the agreement with us, but with some ______. A. recurrence B. rejection C. reluctance D. refutation

单选题If they think they are going to win over us by obstinately ______ and refusing to make the shghtest concession, they are mistaken.

单选题DDT, the most powerful pesticide the world A(has ever known), exposed nature's vulnera-bility. Unlike most pesticides, B(whose effectiveness is) C(limited to destroy) one or two types of insects, DDT D(is capable of killing) hundreds of different kinds at once.