单选题She was ______ between two very fat women and felt extremely uneasy. A. towed B. tugged C. sandwiched D. wedged

单选题The Internet is a global network that connects other computer networks, together with software and protocols for controlling the movement of data. The Internet, often referred to as "the Net", was initiated in 1969 by a group of universities and private research groups funded by the US Department of Defense. It now covers almost every country in the world. Its organization is informal and deliberately nonpolitical; its controllers tend to concentrate on technical aspects rather than on administrative control. The Internet offers users a number of basic services including data transfer, electronic mail, and the ability to access information in remote databases. A notable feature is the existence of user groups, which allow people to exchange information and debate specific subjects of interest. In addition, there are a number of high-level services. For example, MBONE allows the transmission of messages to more than one destination. It is used in videoconferencing. The World Wide Web, known as "the Web", is another high level Internet service, developed in the 1990s in Geneva. It is a service for distributing multimedia information, including graphics, pictures, sounds, and video as well as text. A feature of the World Wide Web is that it allows links to other related documents elsewhere on the Internet. Documents for publication on the Web are presented in a form known as HTML (hypertext mark up language). This allows a specification of the page layout and typography as it will appear on the screen. It also allows the inclusion of active links to other documents. Generally, these appear on the screen display as highlighted text or as additional icons. Typically, the user can use a mouse to "click" on one of these points to load and view a related document. Many commercial and public organizations now have their own Web site (specified by an address code) and publish a "home page", giving information about the organization. Up to the mid-1990s, the major users of the Internet were academic and research or ganizations. This has begun to change rapidly with individual home users linking in through commercial access providers and with a growing interest by companies in using the Internet for publicity, sales, and as a medium for electronic publishing. At the same time, there are problems with the flow of information across national borders, bringing in debates about copyright protection, data protection, the publication of pornography, and ultimately political control and censorship.

单选题Some British universities are state-supported, others are privately______and still others are supported by religious origination.

单选题The police have asked for the ______of the public in tracing the whereabouts of the missing child. A.award B.co-operation C.position D.helpfulness

单选题I was in some doubt as to whether the Corporal had __________ us accidentally on his way out of the town or if he'd been deliberately tasked.

单选题When I was still an architecture student, a teacher told me, "We learn more from buildings that fall down than from buildings that stand up. " What he meant was that construction is as much the result of experience as of theory. Although structural design follows established formulas, the actual performance of a building is complicated by the passage of time, the behavior of users, the natural elements—and unnatural events. All are difficult to simulate. Buildings, unlike cars, can't be crash-tested. The first important lesson of the World Trade Center collapse is that tall buildings can withstand the impact of a large jetliner. The twin towers were supported by 59 perimeter columns on each side. Although about 30 of these columns, extending from four to six floors, were destroyed in each building by the impact, initially both towers remained standing. Even so, the death toll(代价)was appalling—2,245 people lost their lives. I was once asked, how tall buildings should be designed given what we'd learned from the World Trade Center collapse. My answer was,"Lower. " The question of when a tall building becomes unsafe is easy to answer. Common aerial fire-fighting ladders in use today are 100 feet high and can reach to about the 10th floor, so fires in buildings up to 10 stories high can be fought from the exterior(外部). Fighting fires and evacuating occupants above that height depend on fire stairs. The taller the building, the longer it will take for firefighters to climb to the scene of the fire. So the simple answer to the safety question is "Lower than 10 stories. " Then why don't cities impose lower height limits? A 60-story office building does not have six times as much rentable space as a 10-story building. However, all things being equal, such a building will produce four times more revenue and four times more in property taxes. So cutting building heights would mean cutting city budgets. The most important lesson of the World Trade Center collapse is not that we should stop building tall buildings but that we have misjudged their cost. We did the same thing when we underestimated the cost of hurtling along a highway in a steel box at 70 miles per hour. It took many years before seat belts, air bags, radial tires, and antilock brakes became commonplace. At first, cars simply were too slow to warrant concern. Later, manufacturers resisted these expensive devices, arguing that consumers would not pay for safety. Now we do—willingly.

单选题The applied scientist ______.

单选题The police accused him of setting fire to the building but he denied______in the area on the night of the fire.(南京大学2007年试题)

单选题The private detective, having received new information from a confidential source, narrowed down the ______ of his enquiry into the case.

单选题Professional archivists and librarians have the resources to duplicate materials in other formats and the expertise to retrieve materials trapped in ______ computers.

单选题 The events of Sept. 11 have ratcheted up security at American airports to the highest level ever, according to a spokesman for Transportation Secretary Norman Mineta. But to say there is plenty of room for improvement puts it mildly. Hundreds of employees with access to high-security areas at 15 U. S. airports have been arrested or indicted by federal law enforcement officials for using phony Social Security numbers, lying about criminal convictions0r being in the United States illegally. None of those arrested had terrorist links, but some aviation experts said the workers were in a position to help smuggle weapons or bombs aboard aircraft if they had wanted. Tests ordered by President Bush and conducted by federal agents at 32 airports between November and February, when airports were on highest alert, showed that security screeners failed to detect knives 70% of the time, guns 30% of the time and simulated explosives 60% of the time. Two members of the House Transportation Committee are pushing to reverse the administration's opposition to arming pilots because groups representing pilots are insisting that their members need to be armed as a last line of defense. Attorney General John Ashcroft said the arrests of hundreds of airport employees showed that the system of background checks--done piecemeal by airlines, private contractors and others--needs tightening. That much is painfully obvious. What isn't clear is why the system was so porous (有漏洞的) to begin with and why it wasn't immediately tightened after that infamous Tuesday in September. Some people in the industry wisely have suggested that all airport workers be required to pass through the same metal detectors and other security checks as flight crews do, Congress has ordered the new Transportation Security Administration to find ways to enact just such a requirement. Unfortunately, no deadline has been set, in part because federal officials are preoccupied with getting thousands of new baggage screeners in place by Nov. 19--when the feds take over airport security--and installing bomb-detection equipment in all airports by the end of the year. Plainly, those two goals are critical. But it would be a mistake to give low priority to fixing other gaping holes in the nation's airport security net. If the federal crackdown is going to be effective, it needs to be comprehensive.

单选题 Each year, millions of people in Bangladesh drink ground water that has been polluted by naturally high levels of arsenic poison. Finding safe drinking water in that country can be a problem. However, International Development Enterprises has a low-cost answer. This nongovernmental organization has developed technology to harvest rainwater. People around the world have been harvesting rainwater for centuries. It is a safe, dependable source of drinking water. Unlike ground water, rainwater contains no minerals or salts and is free of chemical treatments. Best of all, it is free. The rainwater harvesting system created by International Development Enterprises uses pipes to collect water from the tops of buildings. The pipes stretch from the buildings to a two-meter tall storage tank made of metal. At the top of the tank is a so-called "first-flush" device made of wire screen. This barrier prevents dirt and leaves in the water from falling inside the tank. A fitted cover sits over the "first-flush" device. It protects the water inside the tank from evaporating. The cover also prevents mosquito insects from laying eggs in the water. Inside the tank is a low cost plastic bag that collects the water. The bag sits inside another plastic bag similar to those used to hold grains. The two bags are supported inside the metal tank. All total, the water storage system can hold up to three-thousand-five-hundred liters of water. International Development Enterprises says the inner bags may need to be replaced every two to three years. However, if the bags are not damaged by sunlight, they could last even longer. International Development Enterprises says the water harvesting system should be built on a raised structure to prevent insects from eating into it at the bottom. The total cost to build this rainwater harvesting system is about forty dollars. However, International Development Enterprises expects the price to drop over time. The group says one tank can provide a family of five with enough rainwater to survive a five-month dry season.

单选题Scientific evidence from different disciplines demonstrates that in most humans the left half of the brain controls language.

单选题It has been said that printing does as much harm as good, since it gives us bad books as well as good ones and ______ falsehood and error no less than knowledge and truth.

单选题The bird flu virus is mutating and becoming more dangerous to mammals, according to researchers. The discovery reinforces fears that a human pandemic of the disease could yet occur. Avian flu hit the headlines in 1997 when a strain called H5N1 jumped from chickens to people, killing 6 people in Hong Kong. Within 3 days, the country"s entire chicken population was slaughtered and the outbreak was controlled. Since then new strains of virus have emerged, killing a further 14 people. As yet, no strain has been able to jump routinely from person to person. But if a more virulent strain evolves, the fear is that it could trigger widespread outbreaks, potentially affecting millions of people. Now, genetic and animal studies show that the virus is becoming more menacing to mammals. Immediate action is needed to stem the virus"s transmission, says Hualan Chen from Harbin Veterinary Research Institute, China, who was involved in the research. Chen and colleagues studied 21 H5N1 flu virus samples taken from apparently healthy ducks, which act as a natural reservoir for the disease, in southern China between 1999 and 2002. The researchers inoculated groups of chickens, mice and ducks with virus samples taken from different years and waited to see which animals became ill. Their results are presented this week in the Proceedings of the National Academy of Sciences . As expected, ducks were immune to the virus"s effects and the chickens fell sick. However, the mice also became ill, losing weight and the use of their limbs. Crucially, the severity of their illness was linked with the year from which the virus sample was taken. Viruses isolated in 2001 and 2002 made the animals more ill than those isolated earlier on. The findings hint that some time around 2001, the virus became adept at infecting mammals. Genetic analysis of the same samples reveals that the virus"s DNA changed over that time, suggesting that accumulated mutations may have contributed to the increased virulence. Researchers are concerned that a virus that has acquired the ability to infect mice could also infect humans. "The disease could resurge at any time," warns virologist Marion Koopmans from the National Institute of Public Health and the Environment in Bilthoven, the Netherlands. The findings highlight the need for improved surveillance to ensure that any future outbreaks are curtailed, she says. Although domestic poultry are easily culled, wild animals are more difficult to contain. "It is impossible to eradicate the natural reservoir," says Koopmans, "so we need to learn to live with it." Birds may not be the only villains in this story, however. Chen believes that pigs may also play a part. In Asia, chickens and pigs are often kept in close proximity, so the virus may have shuffled back and forth between the 2 species, picking up mutations and becoming better at infecting mammalian hosts. Humans may then have caught the disease from swine.

单选题Anti-drug work has become a ______ of attention among the international community with the spread of drug abuse in the world.

单选题Smith failed to ______ for the deficit in the company's hank balance.

单选题{{B}}Passage 5{{/B}} Tests conducted at the University of Pennsylvania's Psychological Laboratory showed that anger is one of the most difficult emotions to detect from facial expression. Professor Dallas E. Buzby confronted 716 students with pictures of extremely angry persons, and asked them to identify the emotion from facial expression. Only 2 percent made correct judgments. Anger was most frequently judged as "pleased." And a typical reaction of a student with the picture of a man who was hopping mad was to classify his expression as either "bewildered", "quizzical", or simply "amazed". Other students showed that it is extremely difficult to tell whether a man is angry or not just by looking at his face. The investigators found further that women are better at detecting anger from facial expression than men are. Paradoxically, they found that psychological training does not sharpen one's ability to judge a man's emotions by his expressions but appears actually to hinder it. For in the university tests, the more courses the subjects had taken in psychology, the poorer judgment scores he turned in.