首页
登录
职称英语
After the violent earthquake that shook Los Angeles in 1994, earthquake scie
After the violent earthquake that shook Los Angeles in 1994, earthquake scie
游客
2023-07-25
32
管理
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. [br] One reason why the loss of lives in the Los Angeles earthquake was comparatively low is that ______.
选项
A、new computers had been installed in the buildings
B、it occurred in the residential areas rather than on the highways
C、large numbers of Los Angeles residents had gone for a holiday
D、improvements had been made in the constructions of buildings and highways
答案
D
解析
依据是第三段第二句话:…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.A项和B项在文章中没有提到。C项的内容在文中提到了,虽然时间是假日,但文中并没有说是因为大量的居民外出度假了。原因是建筑法规在以往20年内的改变。
转载请注明原文地址:https://tihaiku.com/zcyy/2868532.html
相关试题推荐
Theearthquakeleftthousandsofpeople______(急需要医疗照顾).inurgentneedofmedic
[originaltext]Thetwenty-thirdOlympicGameswereheldinLosAngelesand,
[originaltext]Thetwenty-thirdOlympicGameswereheldinLosAngelesand,
FromBostontoLosAngeles,fromNewYorkCitytoChicagotoDallas,museums
FromBostontoLosAngeles,fromNewYorkCitytoChicagotoDallas,museums
AftertheviolentearthquakethatshookLosAngelesin1994,earthquakescie
AftertheviolentearthquakethatshookLosAngelesin1994,earthquakescie
AftertheviolentearthquakethatshookLosAngelesin1994,earthquakescie
EarthquakeCanScientistsPredictKillerEarthquakes?
EarthquakeCanScientistsPredictKillerEarthquakes?
随机试题
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreatp
图示为对称结构,则a杆的轴力为()。 A.受压 B.受拉 C.0 D.
动态主机配置协议(DHCP)的作用是();DHCP客户机如果收不到服务器分配
在软件开发过程中,系统测试阶段的测试目标来自于()阶段。A.需求分析 B.概
利用凝胶层析法进行分级分离时大多采用的层析柱长度是A:10~20cmB:20~
退休期的理财需求分析包括()。A.保障财务安全 B.储蓄和投资 C.建立信
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定规律性: A.如上
课程实施作为一个动态的序列化的实践过程,具有一定的运行结构。其运行结构有哪些?
孙某居住在某市桥西区朝阳派出所辖区,2019年1月5日因在桥东区销赃被桥东公安分
关于股份和股票的以下表述,不正确的是()。 A.股票可以流通并可以设置质押
最新回复
(
0
)