题目内容
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 buildings be designed to withstand catastrophic blasts inflicted by terrorists'？
Ten day's after the terrorist attacks on the twin towers, structural engineers from the University at Buffalo and the Multidisciplinary Center for Earthquake Engineering Research(MCEER) headquartered at UB traveled to ground zero(世贸中心被毁现场)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 M. 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(附近). "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 a part of that building." explained A. Whittaker, Ph. D. "This 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, allowing floors that were pierced by tons of falling debris to remain intact. "Highly redundant ductile (易变形的)framing systems may provide a simple, but robust strategy for blast resistance. " he added. Other strategies may include providing alternate 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." Reinhom, 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. 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.
The question raised in the first paragraph is one______.
查看答案
搜索结果不匹配？点我反馈
更多问题
Homosexuals (同性恋)
Many homosexuals prefer to be called gay or, for woman, lesbian. Most of them live quiet lives just (51) anyone else. Some gay people have always raised children, (52) or with partners, and the use of artificial insemination (人工受精) is increasing among lesbians.
Gay persons are in every kind of job. Some are very open about their homosexuality, and some are more private. Some (53) their sexual orientation as a biological given and others as a choice. For those women who see it as a choice, one reason often given is the inequality in most heterosexual (异性恋的) relationships.
Homosexuality has been common in most cultures throughout history and generally (54) . As a result, homosexual activity became a crime, (55) which the penalty in early courts was death. Homosexual behavior. is still (56) in many countries and the United States.
Homosexuality later came to be viewed widely as less a sin than a sickness, but now no mental health professional (具有从业资格的人) any longer (57) homosexuality an illness. More recent theories to (58) for homosexuality have included those based on biological and sociological factors. Today, (59) , there is no conclusive general theory that can explain the cause of homosexuality.
Attitudes (60) homosexuality began to change in the second half of the 20th century. Gays attribute this, in part, to their own struggle for their rights and pride in their orientation. Some large companies now (61) health-care benefits to the life partners of their gay employees. Many cities also have officially appointed lesbian and gay advisory (咨询) committees.
(62) some attitudes have changed, however, prejudice (偏见) still exists, and in the late 1980s and early 1990s there were considerable shouts against homosexuals, with attempt to (63) laws forbidding the granting of basic civil rights to gays.
The AIDS epidemic, which started in the 1980s, has devastated(毁坏)the gay community and brought it together as never before, The organized gay response to the lack of government financial support for fighting AIDS and to the needs of the thousands of AIDS victim. (64) they be gays or not, has been a model of community action. AIDS, however, has also (65) people with another reason for their prejudice.
(51)
听力原文：W :I wanted to any him a gift for his birthday, but now it's passed.
M: It's not too late, you know. You still could.
Q: What did the woman want to do？
(16)
患者中风已半年有余。现见左半身仍活动不便，枯瘦，形赢自汗，手足肿胀，口角喁斜，语言不利，面色觥白，气短乏力，心悸便溏。舌暗淡，苔白，脉细涩。实验室检查脑部CT示：右侧基底节区陈旧性脑梗死。其证型是
听力原文： There is a popular belief among parents that schools are no longer interested in spelling. No schools I have taught in have ever ignored spelling or consider it unimportant as a basic skill. There are, however, vastly different ideas about how to teach it, or how to encourage a child to express himself freely and confidently in writing without holding him back with the complexities of spelling.
If spelling becomes the only focal point of his teacher's interest, clearly a bright child will be likely to "play safe". He will tend to write only words within his spelling range, choosing to avoid adventurous language. That's why teachers often encourage the early use of dictionaries and pay attention to content rather than technical ability.
I was once shocked to read on the bottom of a sensitive piece of writing about personal experience: "This work is terrible! There are far too many spelling errors and your writing is illegible." It may have been a sharp criticism of the pupil's abilities in writing, but it was also a sad reflection on the teacher who had omitted to read the essay, which contained some beautiful expression of the children's deep feelings. The teacher was not wrong to draw attention to the errors, but if his priorities had centered on the child's ideas, an expression of his disappointment with the presentation would have given the pupil more motivation to seek improvement.
(32)
微信支付 
支付宝支付