首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The opinion of many engineers is that the architects that designed tine New York World Trade Center Twin Towers did a good job i
The opinion of many engineers is that the architects that designed tine New York World Trade Center Twin Towers did a good job i
admin
2012-12-13
91
问题
The opinion of many engineers is that the architects that designed tine New York World Trade Center Twin Towers did a good job in designing the buildings. The buildings were safe from the hazards envisioned at the time. Indeed, they were designed to withstand the force of aircraft that might crash into them. They were not, however, designed to withstand the effects of the very high temperatures generated by the ignition of tons of aviation fuel carried by the aircraft.
Steel lightly covered with concrete is the main structural component of the towers and steel loses a lot of structural strength when heated to 1,100 degrees Centigrade and beyond, as it was. To shield the steel the towers beams(柱梁) were c0ated with a few centimeters of concrete. That insulation was to provide structural integrity for at least 1 hour of fire. The towers met that test. The south tower lasted 62 minutes. The north, 103 minutes. Tragedy followed when not all could escape prior to the collapse.
Most experts agree that the Twin Towers were very. well designed. Many also agree that the pan pie planning the attacks were very knowledgeable and aimed the aircraft at a height that would effect the most damage. The aircraft crash and the resulting fuel fed fires were aimed at about the 90th floor. That was just high enough to insure that the upper floors would weaken with the heat and crack down, dropping into the remaining part of the building. The mass of the falling top floors created such a falling load that some experts estimate it exceeded by 5 to 10 times normal bearing loads. The effect was like a giant hammer, each floor contributing more weight to be born by the next floor down.
Were the Trade Towers well designed? Engineers say yes. But, the public refers to the belief that architects will never again design a tall building without considering the effects of terrorist attacks of all potential kinds. That not only includes the ability of the structure to withstand attack but the means to allow the buildings occupants(居住者) to escape in time to survive.
As we know from the 3rd paragraph, many people believe that ______.
选项
A、the attack was led by Bin Laden
B、those who directed the attack was better engineers than those who built the towers
C、those who directed the attack know quite a lot about the towers
D、the attack was made spontaneously
答案
C
解析
第三段第二句Many also agree that the people planning the attacks were very knowledgeable and aimed the aircraft at a height that would effect the most damage.,意思是“许多人都认为策划袭击的人知识渊博,他们使飞机在一个能对大厦造成最大破坏的高度进行攻击。”由此可知,这些人对大厦的结构特点非常了解,与C)含义相符。B)具有一定的迷惑性,但原文并没有说策划飞机袭击的人是工程师,更没有将他们的水平与建造大厦的工程师们相比,故排除;A)、D)原文均未涉及,故排除。
转载请注明原文地址:https://kaotiyun.com/show/Bfw7777K
0
大学英语四级
相关试题推荐
Theworkonatmosphericchlorofluorocarbons(氯氟化碳)ledeventuallytoaglobalCFCbanthatsavedusfromozone-layerreduction.Do
Theworkonatmosphericchlorofluorocarbons(氯氟化碳)ledeventuallytoaglobalCFCbanthatsavedusfromozone-layerreduction.Do
A、Cyclingaroundalake.B、Motorracinginthedesert.C、Playingbasketballinagym.D、Swimminginasportscenter.A选项均以动词一ing
OnefeatureofnewfoundwealthinthedevelopingworldhasbeentheembraceofWesternluxurylabels.Butsincetheglobalecono
OnefeatureofnewfoundwealthinthedevelopingworldhasbeentheembraceofWesternluxurylabels.Butsincetheglobalecono
OnefeatureofnewfoundwealthinthedevelopingworldhasbeentheembraceofWesternluxurylabels.Butsincetheglobalecono
Averyimportantworldproblemistheincreasingnumberofpeoplewhoactuallyinhabitthisplanet.Thelimitedamountoflanda
Shenearly______whensheheardthatherhusbandwasamongthoseburiedintheruinsoftheWorldTradeCenter.
Thisisanewmodelof______computerespeciallydesignedtomeettheneedsoftravelingbusinessmen.
随机试题
肾气不足可导致肝胃失和可导致
"寒极生热,热极生寒"说明"阴在内,阳之守,阳在外,阴之使"说明
项目总体管理目标应由()制定。
承德避暑山庄始建于清乾隆年间。()
港珠澳大桥全长近55千米,其中主体工程“海中桥隧”长达35千米。岛隧工程是最具控制性的部分,其中连接大桥东、西人工岛的沉管部分是国内首条于外海建设的超大型沉管隧道。2017年7月7日,港珠澳大桥主体全线贯通。读图回答19~2l题。港珠澳大桥超大型沉管
考古学中,有“地层”之说。如同文明的遗迹,人类的历史同样是一层叠压一层,在岁月的________下,积淀为一个国家,一个民族的“心灵地层”,________了共同的记忆、共同的文化、共同的品性。填入画横线部分最恰当的一项是:
Taxesaccountforalmost20percentoftheyearly________ofAmericanfamilies.
结合材料回答问题:材料1中华民族历来有重家风、重家教、守家规的传统,好家风的事例可谓不胜枚举。宋代的司马光,在给儿子司马康的家训—《训俭示康》中说道:“平生衣取蔽寒,食取充腹;亦不敢服垢弊以矫俗干名,但顺吾性而已。众人皆以奢靡为荣,吾心独以俭素
数据的逻辑结构有线性结构和______两大类。
Ifyouareworriedaboutthingsandareunderalotofstressatworkorschool,thenyouareprobablynotsleepingwell.Worry
最新回复
(
0
)