单选题Even though we had been to her house several times before, we still did not remember ______.

单选题The journal published a series of articles that reviewed the prospects for a new era of "genetic medicine".

单选题Being a foreigner, Cad did not ______ to the joke. A. appreciate B. catch on C. laugh D. like

单选题Vigorously challenged yet widely ignored, the theory had languished for half a century, primarily due to its lack of a______mechanism to support the hypothesis.

单选题Sometimes the biggest changes in society are the hardest to spot precisely because they are hiding in plain sight. It could well be that way with wireless communications. Something that people think of as just another technology is beginning to show signs of changing lives, culture, politics, cities, jobs, even marriages dramatically. In particular, it will usher in a new version of a very old idea: nomadism. Futurology is a dangerous business, and it is true that most of the important arguments about mobile communications at the moment are to do with technology or regulation—bandwidth, spectrum use and so on. Yet it is worth jumping ahead and wondering what the social effects will be, for two reasons. First, the broad technological future is pretty clear: there will be ever faster cellular networks, and many more gadgets to connect to these networks. Second, the social changes are already visible: parents on beaches waving at their children while typing furtively on their BlackBerrys; entrepreneurs discovering they don't need offices after all. Everybody is doing more on the move. Wireless technology is surely not just an easier-to-use phone. The car divided cities into work and home areas; wireless technology may mix them up again, with more people working in suburbs or living in city centers. Traffic patterns are beginning to change again: the rush hours at 9am and 5pm are giving way to more varied patterns, with people going backwards and forwards between the office, home and all sorts of other places throughout the day. Already, architects are redesigning offices and universities, more flexible spaces for meeting people, fewer private enclosures for sedentary work. Will it be a better life? In some ways, yes. Digital nomadism will liberate ever more knowledge workers from the cubicle prisons as depicted in Mr. Dilbert's cartoons. But the old tyranny of place could become a new tyranny of time, as nomads who are "always on" all too often end up— mentally—anywhere but here. As for friends and family, permanent mobile connectivity could have the same effect as nomadism: it might bring you much closer to family and friends, but it may make it harder to bring in outsiders. Sociologists fret about constant e-mailers and texters losing the everyday connections to casual acquaintances or strangers sitting next to them in the cafe or on the Bus. The same tools have another dark side, turning everybody into a fully equipped paparazzo. Some fitness clubs have started banning mobile phones near the treadmills and showers lest exercising people find themselves pictured, flabby and sweaty, on some website. As in the desert, so in the city: nomadism promises the heaven of new freedom, but it also signals the hell of constant surveillance by the tribe.

单选题According to the passage, we know it's better for the pregnant women ______.

单选题Mary had finished her homework ______ the time I got home. A. until B. at C. by D. when

单选题What is the author's purpose of writing the passage?

单选题Shewasstaringoutoverthelake,lostin_______.

单选题As researchers on aging noted recently, no treatment on the market today has been proved to slow human aging. ______. Those findings suggest that caloric restriction could delay aging and increase longevity in humans, too.

单选题Not until you talked with him ______ that he had made a serious mistake.

单选题There is more land in Australia than the government knows ______. A. what to do with B. how to do C. to do with it D. to do it

单选题—I heard that some police didn' t allow suspects enough sleep to get so-called criminal evidence in America. —______? This certainly goes against the rule of law.

单选题The mysterious guest on the show is______the president of our university.

单选题The decline of traditional religion in the West has not removed the need for men and women to find a deeper meaning behind existence. Why is the world the way it is and how do we, as conscious individuals, fit into the great scheme? There is a growing feeling that science, especially what is known as the new physics, can provide answers where religion remains vague and faltering. Many people in search of a meaning to their lives are finding enlightenment in the revolutionary developments at the frontiers of science. Much to the bewilderment of professional scientists, quasi-religious cults are being formed around such unlikely topic as quantum physics, space-time relativity, black holes and the big bang. How can physics, with its reputation for cold precision and objective materialism, provide such fertile soil for the mystical? The truth is that the spirit of scientific enquiry has undergone a remarkable transformation over the past 50 years. The twin revolutions of the theory of relativity, with its space-warps and time-warps, and the quantum theory, which reveals the shadowy and unsubstantial nature of atoms, have demolished the classical image of a clockwork universe slavishly unfolding along a predetermined pathway. Replacing this sterile mechanism is a world full of shifting indeterminism and subtle interactions which have no counterpart in daily experience. To study the new physics is to embark on a journey of wonderment and paradox, to glimpse the universe in a novel perspective, in which subject and object, mind and matter, force and field, become intertwined. Even the creation of the universe itself has fallen within the province of scientific enquiry. The new cosmology provides, for the first time, a consistent picture of how all physical structures, including space and time, came to exist out of nothing. We are moving towards and understanding in which matter, force, order and creation are unified into a single descriptive theme. Many of us who work in fundamental physics are deeply impressed by the harmony and order which pervades the physical world. To me the laws of the universe, from quarks to quasars, dovetail together so felicitously that the impression there is something behind it all seems overwhelming. The laws of physics are so remarkably clever that they can surely only be a manifestation of genius.

单选题These charming girls are the ______ of equal pay for men and women.

单选题(2005)At last the girl_____my invitation.

单选题Until recently, the main villains of the piece had seemed to be the teachers" unions, who have opposed any sort of reform or accountability. Now they face competition from an unexpectedly destructive force: the court. Fifty years ago, it was the judges who forced the schools to desegregate through Brown v. Board of Education (1954). Now the courts have moved from broad principles to micromanagement, telling schools how much money to spend and where - right down to the correct computer or textbook. Twenty four states are currently Stuck in various court cases to do with financing school systems, and another 21 have only recently settled various suits. Most will start again soon. Only five states have avoided litigation entirely. Nothing exemplifies the power of the courts better than an 11-year-old case that is due to be settled (sort of) in New York City, the home of America"s biggest school system with 1. lm students and a budget nearing $13 billion. At the end of this month, three elderly members of the New York bar serving as judicial referees are due to rule in a case brought By the Campaign for Fiscal Equity, a leftish advocacy group, against the state of New York: they will decide how much more must Be spent to provide every New York City pupil with a "sound basic" education. Rare is the politician willing to argue that more money for schools is a bad thing. But are the courts doing any good? Two suspicions arise. First, judges are making a lazy assumption that more money means better schools. As the international results show, the link between "inputs" and "outputs" is vague--something well documented by, among others, the late Senator Daniel Patrick Moynihan of New York. Second, the courts are muddling an already muddled system. Over time, they have generally made it harder to get rid of disruptive pupils and bad teachers. The current case could be even worse. The courts have already said that, in order to determine the necessary spending, they may consider everything from class size to the availability of computers, textbooks and even pencils. This degree of intervention is all the more scandalous because the courts have weirdly decided to ignore another set of "inputs"--the archaic work practices of school teachers and janitors. David Schoenbrod and Ross Sandier of New York Law School reckon the demands of the court will simply undermine reform and transform an expensive failure into a more expensive one. And of course, the litigation never ends. Kentucky, for example, is still in court 16 years after the first decision. A lawsuit first filed against New Jersey for its funding of schools in 1981 was "decided" four years later--but it has returned to the court nine times since, including early this year, with each decision pushing the court deeper into the management of the state"s schools. Bad iudges are even harder to boot out of school than bad pupils.

单选题选出应填入下面一段英语中______内的正确答案。 When the system upon which a transport entity is running fails and subsequently restarts, the (1) information of all active connections is lost. The affected connections become half-open, as the side that did not fail does not yet realize the problem. The still active side of a half-open connections can close the connection using a (2) timer. This timer measures the time transport machine will continue to await an (3) of a transmitted segment after the segment has been retransmitted the maximum number of times. When the timer (4) the transport entity assumes that either the other transport entity or the intervening network has failed. As a result, the timer closes the connection, and signals an abnormal close to the TS user. In the event that a transport entity fails and quickly restart, half-open connections can be terminated more quickly by the use of the RST segment. The failed side returns an RST i to every segment i that it receives. When the RST i reaches the other side, it must be checked for validity based on the (5) number i, as the RST could be in response to an old segment. If the reset is valid, the transport entity performs an abnormal termination.