Question

阅读下列短文，从每题所给的四个选项中，选出一个最佳答案.

　　The opinion of many engineers is that the architects that designed the 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 carded 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 1100 degrees Centigrade and beyond, as it was. To shield the steel the towers beams were coated with a few centimeters of concrete. That insulation was to provide structural integrity for at least I 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 people 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

believes 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 to escape in time to survive.

（1）Many engineers after September 11 believe that the Twin Towers were well designed because ________.

[　　]

A. it could withstand aircraft crashing into it

B. it could withstand any natural hazards such as earthquake or fire

C. it had an appealing and elegant appearance until they were destroyed

D. they had the miserable honor of being selected as the target of terrorist attack

（2）According to the article, those who designed the tower could have done better if ________.

[　　]

A. the tower lasted longer after being attacked

B. the tower held stable until all of the people inside managed to escape

C. the tower was immune to such attacks

D. they considered more about the effects of the very high temperatures on the structure

（3）As we know from the 3rd paragraph, many people believe that _______.

[　　]

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

（4）The part of the building below 90th floor ________.

[　　]

A. remained where they were

B. cracked down because of the burning

C. was hammered down by the falling upper part

D. was safe after the attack

（5）The author believe that the Twin towers ________.

[　　]

A. were not well-designed

B. were well-designed

C. were good examples for engineers of our time

D. were out of consideration when we talk about engineering later

Answer 1

答案：A;D;C;C;A
解析：

(1) A 这是一道细节题.短文第一段中The buildings were safe from hazards envisioned at the time. Indeed, they were designed to withstand the force of air craft that might crash into them.说明，许多工程师认为，世贸中心双子楼设计得很好的主要原因是因为它们遭到飞机撞击之后没有马上倒塌，A是最佳选项. (2) D 这是一道细节题?从短文第一段中They were not，however，designed to with stand the effects of the very high temperatures generated by the ignition of tons of aviation fuel carried by the aircraft.可以看出，设计世贸中心双子楼的工程师们如果更多地考虑高温的影响并且做相应的调整的话.后果会比现在好一些. (3) C 这是一道细节题.短文第三段中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.清楚地表明，那些指挥9·11袭击事件的人熟知世贸中心双子楼的许多情况. (4) C 这是一道综合分析判断题.短文第三段叙述了世贸中心90层以上的顶层楼在经受热方面比较薄弱，容易倒塌.我们再根据短文倒数第二段中The effect was like a giant hammer, each floor contributing more weight to be born by the next floor down.可以判断出，90层楼下的建筑物部分被上边一层塌下来的楼房部分所击倒，故答案选C. (5) A 这是一道推测作者写作意图的题目.根据短文最后一段叙述的公众相信，工程师们当初并没有考虑各种恐怖袭击的因素：真正设计好的大楼不仅能经得起各类撞击，而且允许建筑物里的人能及时逃生.由此可判断出，在作者看来.世贸中心的双子楼并没有得到很好的设计.