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
2025-04-09
20
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 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] People began to add rubber and steel between the buildings and its base so as to____.
选项
A、Make the building flexible
B、Make the building firm
C、To decrease the effects of the vibration
D、To avoid the earthquake
答案
C
解析
句中只有C最合适,D选项过于宽泛,其它选项过于狭窄。
转载请注明原文地址:https://tihaiku.com/zcyy/4033567.html
相关试题推荐
WhenFrankDaletookoveraspublisherofLosAngelesHerrald-Examiner,the
WhenFrankDaletookoveraspublisherofLosAngelesHerrald-Examiner,the
Manhaslongwishedtopredictearthquakes.Recentfindingsindicatethatr
Manhaslongwishedtopredictearthquakes.Recentfindingsindicatethatr
Manhaslongwishedtopredictearthquakes.Recentfindingsindicatethatr
Foranyonewhohasexperiencedanearthquake,theexperiencecanbefrighten
Playingviolentvideogamescanhaveimmediateandlastingeffectsonapers
Playingviolentvideogamescanhaveimmediateandlastingeffectsonapers
Playingviolentvideogamescanhaveimmediateandlastingeffectsonapers
Itisno______thatalargenumberofviolentcrimesarecommittedundertheinfl
随机试题
ToLegalizePotorNotLegalizingpotisnotnowasra
InAmericathejudicialisheadedbyA、thePresident.B、Congress.C、theSupremeC
[originaltext]Whatdotheydecidetodo?[/originaltext]A、ToringuptheABCand
《计算机软件产品开发文件编制指南》将软件项目文档分为开发文档、管理文档和()
入境旅游团中有人提出游览计划外的一个著名景点,在时间许可的情况下,地陪的正确做法
变电站室内SF6氧量告警仪每()检查维护1次。周$;$月$;$季$;$年
甲起诉乙请求离婚,一审判决不准离婚,甲不服提起上诉。二审法院审理后认为应当判决离
(2018年真题)在我国法律体系的基本框架中,属于诉讼程序法部门的法律有(
原发性慢性肾上腺皮质功能减退所致消瘦的特点A、消瘦伴消化不良 B、消瘦伴发热
23岁女性患者,发热咽痛3天后出现双下肢水肿伴尿量减少,血压。160/100mm
最新回复
(
0
)