单选题Not all member states abided by the principle they had agreed on previously.

单选题It appears that the Poplar to Stratford section of the DLR route was originally developed to

单选题{{B}}第三篇{{/B}} Can Buildings Be Designed to Resist Terrorist Attack In the aftermath of the terrorist attack on the World Trade Center, structural engineers are trying hard to solve a question that a month ago would have been completely unthinkable.. Can building be designed to withstand catastrophic (灾难的) blasts inflicted by terrorists? Ten days after the terrorist attacks on the twin towers, structural engineers from the University at Buffalo (布法罗) and the Multidisciplinary Center for Earthquake Engineering Research (MCEER) headquartered(总部) at UB traveled to ground zero as part of a project funded by the National Science Foundation. Visiting the site as part of an MCEER reconnaissance visit. They spent two days beginning the task of formulating ideas about how to design such structures and to search for clues on how to do so in buildings that were damaged, but still are standing. "Our objective in visiting ground zero was to go and look at the buildings surrounding the World Trade Center, those buildings that are still standing,but that sustained damage," said Mr. Bruneau, Ph. D. "Our immediate hope is that we can develop a better understanding as to why those buildings remain standing,while our long-term goal is to see whether earthquake engineering technologies can be married to existing technologies to achieve enhanced performance of buildings in the event of terrorist attacks. " he added. Photographs taken by the investigators demonstrate in startling detail the monumental damage inflicted on the World Trade Center towers and buildings in the vicinity. One building a block away from the towers remains standing, but was badly damaged. "This building is many meters away from the World Trade Center and yet we see a column there that used to be part of mat building. " explained A. Whittaker, Ph. D. "The column became a missile that shot across the road,through the window and through the floor. The visit to the area also revealed some surprises, according to the engineers. For example, the floor framing system in one of the adjacent buildings was quite rugged (高低不平的) ,allowing floors that were pierced by tons of falling debris to remain intact. "Highly redundant ductile framing systems may provide a simple, but robust strategy for blast resistance, "he added. Other strategies may include providing alternate (交替) paths for gravity loads in the event that a load-bearing column fails. "We also need a better understanding of the mechanism of collapse. " said A. Whittaker. "We need to find out what causes a building to collapse and how you can predict it. " A. Reinhorn, Ph.D. noted that "earthquake shaking has led to the collapse of many buildings in the past. It induces, dynamic response and extremely high stresses and deformations in structural components (成分). Solutions developed for earthquake-resistant design may be directly applicable to blast engineering and terrorist-resistant design. Part of our mission now at UB is to transfer these solutions and to develop new ones where none exist at present. "

单选题Her father was a quiet man with {{U}}graceful{{/U}} manners. A. polite B. similar C. usual D. bad

单选题We all consider him a man of Udynamic/U personalities.

单选题The latest {{U}}census{{/U}} is encouraging

单选题 More Than a Ride to School The National Education Association claims, "The school bus is a mirror of the community." They further add that, unfortunately, what appears on the exterior does not always reflect the reality of a chosen community. They are right -- sometimes it reflects more! Just ask Lies! Denson. Riding the school bus has been more than a ride to school for Lies!. Bruce Hardy, school bus driver for Althouse Bus Company has been Liesl's bus driver since kindergarten. Last year when Liesl's family moved to Parkesburg, knowing her bus went by her new residence, she requested to ride the same bus. This year Liesl is a senior and will enjoy her last year riding the bus. She says, "It's been a great ride so far! My bus driver is so cool and has always been a good friend and a good listener. Sometimes when you're a child adults do not think that what you have to say is important. Mr. Hardy always listens to what you have to say and makes you feel important." Her friends Ashley Batista and Amanda Wolfe agree. Bruce Hardy has been making Octorara students feel special since 1975. This year he will celebrate 30 years working for Althouse Bus Company. Larry Althouse, president of the company, acknowledges Bruce Hardy's outstanding record: "You do not come by employees like Bruce these days. He has never missed a day of work and has a perfect driving record. He was recognized in 2000 by the Pennsylvania School Bus Association for driving 350,000 accident free miles. Hardy's reputation is made further evident through the relationships he has made with the students that ride his bus." Althouse further adds, "AIthouse Bus Company was established 70 years ago and has been providing quality transportation ever since. My grandfather started the business with one bus. Althouse Bus Company is delighted to have the opportunity to bring distinctive and safe service to our local school and community and looks forward to continuing to provide quality service for many more years to come." Three generations of business is not all the company has enjoyed. Thanks to drivers like Bruce Hardy, they have been building relationships through generations. Liesl's mother Carol also enjoys fond memories of riding Bruce Hardy's bus to the Octorara School District.

单选题The man walked into the library and Udumped/U a pile of books on the counter.

单选题It is obvious that it has been too late to take action.

单选题The bricklayer is working on the house.

单选题Some People Do Not Taste Salt Like Others Low-salt foods may be harder for some people to like than others, according to a study by a Penn State College of Agricultural Sciences food scientist. The research indicates that genetic factors influence some of the difference in the levels of salt we like to eat. Those conclusions are important because recent, well-publicized (大力宣传的) efforts to reduce the salt content in food have left many people struggling to accept food that simply does not taste as good to them as it does to others, pointed out John Hayes, lead investigator on the study. Diets high in salt can increase the risk of high blood pressure and stroke. That is why public health experts and food companies are working together on ways to help consumers lower salt intake through foods that are enjoyable to eat. This study increases understanding of salt preference and consumption. The research involved 87 carefully screened participants who sampled salty foods such as soup and chips, on multiple occasions, spread out over weeks. Test subjects were 45 men and 42 women, reportedly healthy, ranging in age from 20 to 40. They rated the intensity of taste on a commonly used scientific scale, ranging from barely detectable to strongest sensation of any kind. "Most of us like the taste of salt. However, some individuals eat more salt, both because they like the taste of saltiness more, and because it is needed to block other unpleasant tastes in food," said Hayes. "Supertasters, people who experience tastes more in tensely, consume more salt than nontasters. Snack foods have saltiness as their primary flavor, and at least for these foods, more is better, so the supertasters seem to like them more. " However, supertasters also need higher levels of salt to block unpleasant bitter tastes in foods such as cheese, Hayes noted. "For example, cheese is a wonderful blend of dairy flavors from fermented (发酵的) milk, but also bitter tastes from ripening that are blocked by salt," he said. "A supertaster finds low-salt cheese unpleasant because the bitterness is too pronounced." Hayes cited research done more than 75 years ago by a chemist named Fox and a geneticist named Blakeslee, showing that individuals differ in their ability to taste certain chemicals. As a result, Hayes explained, we know that a wide range in taste acuity (敏锐) exists, and this variation is as normal as variations in eye and hair color.

单选题Poor health and lack of money may both be roadblocks to educational progress.

单选题The secretary is expected to explore ideas for post-war reconstruction of the area.

单选题14 In the latter case the outcome can be serious indeed. A. result B. judgment C. decision D. event

单选题It is highly unlikely that she will arrive today.

单选题{{B}}第二篇{{/B}} {{B}}Pushbike Peril{{/B}} Low speed bicycle crashes can badly injure — or even kill — children if they fall onto the ends of the handlebars so a team of engineers is redesigning the humble handlebar in a bid to make it safer. Kristy Arbogast, a bioengineer at the Children's Hospital of Philadelphia in Pennsylvania, began the project with her colleagues after a study of serious abdominal injuries in children in the past 30 years showed that more than a third were caused by bicycle accidents. "the task was to identify how the injuries occurred and come up with some countermeasures." she says. By interviewing the children and their parents, Arbogast and her team were able to reconstruct many of the accidents and identified a common mechanism responsible for serious injures. They discovered that most occur when children hit an obstacle at a slow speed, causing them to topple over. To maintain their balance they turn the handlebars through 90 degrees — but their momentum forces them into the end of the handlebars. The bike then falls over and the other end of the handlebars hits the ground, ramming it into their abdomen. The solution the group came up with is a handgrip fitted with a spring and damping system. The spring absorbs up to 50 per cent of the forces transmitted through the handlebars in an impact. The group hopes to commercialize the device, which should add only a few dollars to the cost of a bike. "But our task has been one of education because up until now, bicycle manufacturer were unaware of the problem," says Arbogast. The team has also approached the US Consumer Product Safety Commission to try to persuade manufacturers to adopt the new design a decision is expected later this year. handlebar n (常用复数)(自行车等的)车把 abdominal adj腹部的 bioengineer n.生物工程师 countermeasure n.对策 abdomen n.膜，腹部 momentum n.冲力 handgrip n.握柄 damping adj.制动的，减速的，缓冲的 commercialize vt.使商品化

单选题The sports meeting was put off because of the heavy rain.A. put downB. put outC. delayedD. cancelled

单选题{{B}}第三篇{{/B}} The School Close When school officials in Kalkaska, Michigan, closed classes last week, the media flocked to the story, portraying the town's 2,305 students as victims of stingy (吝啬的) taxpayers. There is some truth to that: the property-tax rate here is one-third lower than the state average. But shutting their schools also swallowed Kalkaska's educators and the state's largest teachers' union, the Michigan Education Association, to make a political point. Their aim was to spur passage of legislation Michigan lawmakers are debating to increase the state's share of school funding It was no coincidence that Kalkaska shut its schools two weeks after reduced a 28 percent property-tax increase. The school board argued that without the increase it lacked the $ 1.5 million needed to keep schools open. But the school system had not done all it could to keep the schools open. Officials declined to borrow against next year's state aid, they refused to trim extracurricular activities and they did not consider seeking a smaller-perhaps more acceptable-tax increase. In fact, closing early is costing Kalkaska a significant amount, including 4600,000 in unemployment payments to teachers and staff and $ 250,000 in lost state subsidy. In February, the school system promised teachers and staff two months of retirement payments in case schools closed early, a deal that will cost the district $ 275,000 more. Other signs suggest school authorities were at least as eager to make a political statement as to keep schools open. The Michigan Education Association hired a public relations firm to stage a rally marking the school closings, which attracted 14 local and national television stations and networks. The president of the National Education Association, the MEA's parent organization, flew from Washington D. C. , for the event. And to union tutored school officials in the art of television interviews. School supervisor Doyle Disbrow acknowledges the district could have kept schools open by cutting programs but denies the moves were politically motivated. Michigan lawmakers have reacted angrily to the closings. The state Senate has already voted to put the system into receivership (破产管理) and reopen schools immediately; The Michigan House Plans to consider the bill this week.

单选题What a juicy morsel it is!

单选题Relief workers were shocked by what they saw.