首页
登录
职称英语
After the violent earthquake that shook Los Angeles in 1994, earthquake sci
After the violent earthquake that shook Los Angeles in 1994, earthquake sci
游客
2023-11-14
47
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 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 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 vibration. 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 construction of buildings and highways
答案
D
解析
在第三段,作者指出,建筑工程师通过对建筑结构的逐步改进,增加了建筑的防震性能,减少了地震中的伤亡人数,第五段中也有同样的暗示。可见D 是正确的。而A ,B 和C 与文中的信息不相符。
转载请注明原文地址:http://tihaiku.com/zcyy/3185515.html
相关试题推荐
Recentlyanumberofcaseshavebeenreportedofyoungchildren______aviolent
Alltheschools______becauseoftheearthquake,studentsandteachershadtog
Thegrandbuildingwas______toruinsinonenightbecauseoftheearthquake.A、re
Theearthquakeof26thDecember2004resultedinoneoftheworstnaturald
Theearthquakeof26thDecember2004resultedinoneoftheworstnaturald
Theearthquakeof26thDecember2004resultedinoneoftheworstnaturald
Theearthquakeof26thDecember2004resultedinoneoftheworstnaturald
Theearthquakeof26thDecember2004resultedinoneoftheworstnaturald
Theearthquakeof26thDecember2004resultedinoneoftheworstnaturald
Theearthquakeof26thDecember2004resultedinoneoftheworstnaturald
随机试题
Anepigramisusuallydefinedbeingabrightorwittythoughtthatisterselyan
Themoreyouunderstandyourcomputer,the______itisthatyouwillfindoutt
如图所示,建筑剖面从左至右分别是( )。 A.大同善化寺大殿、芮城水乐宫三清
药物选择原则不对的是()A.根据药品的价格用药 B.根据患者的个体差异用
地陪送走旅游团后,通常要处理的遗留问题主要有()。A.转递信件 B.转递物品
大青叶、板蓝根、青黛共同具有的功效是()A.清热解毒,燥湿 B.清热
善"上行头目"功能祛风止痛,为治头痛的要药是A.白芷 B.羌活 C.川芎
CBCL—般通过对儿童的观察和了解,填写其最近()内的情况。 (A)—年
某市提供劳务派遣服务的A公司为小规模纳税人,以1个月为一个纳税期。2020年2月
DNA复制时,以序列5'-TAGA-3为模板合成的互补结构是A.5'-ATCT-
最新回复
(
0
)