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
After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: The damage and death
After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: The damage and death
admin
2010-07-24
85
问题
After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: The damage and death toll (死亡人数) could have been much worse.
More than 60 people died in this earthquake. By comparison, an earthquake of similar intensity that shook America in 1988 claimed 25,000 victims.
Injuries and deaths were relatively less in Los Angeles because the quake occurred at 4:31 a.m. on a holiday, when traffic was light on the city’s highways. In addition, changes made to the construction codes in Los Angeles during the last 20 years have strengthened the city’s buildings and highways, making them more resistant to quakes.
Despite the good news, civil engineers aren’t resting on their successes. Pinned to their drawing boards are blueprints (蓝图) for improved quake-resistant buildings. The new designs should offer even greater security to cities where earthquakes often take place.
In the past, making structures quake-resistant meant firm yet flexible materials, such as steel and wood, that bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and steel between the building and its foundation to reduce the impact of ground vibrations. The most recent designs give buildings brains as well as concrete and steel supports. Called smart buildings, the structures respond like living organisms to an earthquake’s vibrations. When the ground shakes and the building tips forward, the computer would force the building to shift in the opposite direction.
The new smart structures could be very expensive to build. However, they would save many lives and would be less likely to be damaged during earthquakes.
The function of the computer mentioned in the passage is to ______.
选项
A、counter-balance a earthquake’s action on the building
B、predict the coming of an earthquake with accuracy
C、help strengthen the foundation of the building
D、measure the impact of an earthquake’s vibrations
答案
A
解析
关键的句子是第五段的最后一句:When the ground shakes and the building tips forward,the computer would force the building to shift in the opposite direction。根据短文,计算机在地震中可以迫使大楼改变倾斜方向,使之反弹而保持平衡。B项中说的是预测,C项是加固,而D项是测量,都不符合文章中的说明。故选A。
转载请注明原文地址:https://www.kaotiyun.com/show/OPN7777K
0
大学英语四级
相关试题推荐
Thestudentsinthistrainingschool____________(年龄从18到35岁之间不等).
Recently,astudentusedhisPersonalDigitalAssistant(PDA)tofilmafemaleteacherberating(训斥)andtearingtheworkofacl
A、At8:00.B、At8:30.C、At10:00.D、Shedoesn’thaveclass.A
Thefirsttwostagesinthedevelopmentofcivilizedmanwereprobablytheinventionofprimitiveweaponsandthediscoveryoff
WhenIwasachildIhadviolinlessonsforsixorsevenyears.Musicgavemealotofpleasures【M1】______andI
PublicEducationintheUnitedStatesisprogramsofinstruction【S1】______tochildren,adolescents,andadultsintheUnitedSta
A、It’snotveryrelaxing.B、It’ssaferthandriving.C、Itdoesn’tcostverymuch.D、It’seasytodrive.B
Forthispart,youareallowed30minutestowriteashortessayentitledTrafficProblemsinBigCitiesinthreeparagraphs.Fo
Forthispart,youareallowed30minutestowriteonstudyingabroad.Youshouldwriteatleast120wordsfollowingtheoutline
随机试题
电功常用的单位是()。
在供应商关系中,控制的目的是()
病儿4岁。尿频、尿痛、尿急3天,伴发热、烦躁、口渴。治疗首选()
A.表观分布容积B.肠肝循环C.生物半衰期D.生物利用度E.首过效应体内药量或血药浓度下降一半所需要的时间
通常情况下,解析界址点成果包括()。
关于经济分析与财务分析的区别,表述错误的是()。
要造一个底面为正方形的长方体水池,使其容积为V0m3.水池底面的单位面积的造价是侧面的两倍,问底面边长t和高h分别为多少,才能使水池的造价最低?
设A,B均是n阶非零矩阵,已知A2=A,B2=B,且AB=BA=O,则下列3个说法:①0未必是A和B的特征值;②1必是A和B的特征值;③若α是A的属于特征值1的特征向量,则α必是B的属于特征值0的特征向量.正确说法的
设变换可把方程=0简化为=0,求常数a.
Whichofthefollowingsentenceshasanobjectcomplement?
最新回复
(
0
)