首页
登录
职称英语
Since ancient times, the destructive effects of earthquakes on human lives a
Since ancient times, the destructive effects of earthquakes on human lives a
游客
2023-07-06
28
管理
问题
Since ancient times, the destructive effects of earthquakes on human lives and property have encouraged the search for reliable methods of earthquake prediction. This challenge remains and modern scientists continue to search for reliable methods to determine the time, place and intensity of individual quakes. One prediction technique involves an analysis of the recurrence(重现)rates of earthquakes as indicators of future activity. Earthquakes are concentrated in certain areas of the world which are subject to constant movements of earth’s plates and it is in these areas that scientists focus their investigations.
This search for pre-earthquake phenomena has received particular attention. In contrast to the ancient Greeks and Romans, who relied on the crying of dogs as a warning sign, modern scientists have focused on physical evidence for a coming earthquake. Evidence of plate strain can be found by measuring relative movements, while chemical changes also offer signals for scientists.
Analysis of the changes in magnetic properties and conductivity(传导性)of rocks provides further data for prediction. The electrical and magnetic properties of crustal(地壳的)rocks are particularly sensitive to strain. The conductivity of crustal rock is determined by the degree to which the rock is soaked with fluid and the electrolytic properties of those fluids. Before large earthquakes, small fractures develop in rocks, which change the quantity of fluid present. These changes can be measured and provide useful data. However, similar changes in the fluid-bearing capacity of rock can occur as a result of other factors such as changes in the water table, and therefore this technique is not entirely reliable.
The ancient belief that the behavior of birds, cats and dogs provides evidence of inevitable earthquakes has recently gained credence as a result of tests carried out in California. It has been shown that changes take place in the metabolic(新陈代谢的)rates of these animals which correlate with subsequent seismic activity. It is assumed that the animals are sensitive to the seismic waves which precede major quakes. In zones where earthquakes are known to occur, improved construction techniques can significantly reduce the effects of seismic waves. If more accurate information regarding the time and intensity were available, governments could take even more effective measures to reduce the impact on human lives. If, however, an entirely accurate prediction technique became available, there would be significant social and political implications. [br] It can be inferred from the last paragraph that______.
选项
A、animals are very accurate indications of earthquakes
B、coming earthquakes can be precisely predicted now
C、construction improvements can help diminish the destructive effects of earthquakes
D、ancient people are wiser than modern men in using animals for earthquake predictions
答案
C
解析
综合推断题。定位段第四句提到,在一些经常出现地震的区域,改进的建筑技术可以大大减少地震波造成的后果,由此可知,C)“建筑方面的改善可以帮助减小地震的毁灭性后果”为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2814088.html
相关试题推荐
HistoryofAmericanImmigrationA)Ancientpeoplesonlyl
HistoryofAmericanImmigrationA)Ancientpeoplesonlyl
HistoryofAmericanImmigrationA)Ancientpeoplesonlyl
HistoryofAmericanImmigrationA)Ancientpeoplesonlyl
HistoryofAmericanImmigrationA)Ancientpeoplesonlyl
ImaginebeingaslaveinancientRome.Nowrememberbeingone.Thesecondta
ImaginebeingaslaveinancientRome.Nowrememberbeingone.Thesecondta
ImaginebeingaslaveinancientRome.Nowrememberbeingone.Thesecondta
ImaginebeingaslaveinancientRome.Nowrememberbeingone.Thesecondta
ImaginebeingaslaveinancientRome.Nowrememberbeingone.Thesecondta
随机试题
Therearesuperstitionsattachedtonumbers;eventhoseancientGreeksbelie
HowmanyrefugeesCamefromVietnamsincetheearly1970s?[br][originaltext]
Personalityistoalargeextentinherent-A-typeparentsusuallybringabo
[originaltext]W:Hi,ProfessorHiggins.M:Hi,Julia.W:Wouldyoubeabletoh
在一个特定气候区域内,由于局部气候条件较差(热、干燥)而产生的稳定群落是A.前顶
某车间可从A、B两种新设备中选择一种来更换现有旧设备。设备A使用寿命期为6年,
钢结构柱脚在地面以下的部分应采用混凝土包裹,保护层厚度不应小于50mm,并应使包
两构件通过滑动副连接,则两构件间()。A.保留一个移动,约束一个移动和一个转
A.年轻恒牙早期急性牙髓炎 B.年轻恒牙牙髓充血 C.年轻恒牙晚期牙髓炎
11岁男孩,因发热20天来就诊,病初伴咽痛。查体:T38.5℃,P102次/分,
最新回复
(
0
)