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
2024-02-20
3
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 believe that the behavior of birds, cats and dogs provides evidence of inevitable earthquakes has recently been attended 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 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 life, if, however, an entirely accurate prediction technique became available, there would be significant social and political implications. [br] It can be inferred from the passage that______.
选项
A、animals can be used as very accurate indications of earthquakes
B、coming earthquakes can be precisely predicted now
C、constructions improvements can help diminish destructive effects of earthquakes
D、ancient people are wiser than modern men in using animals for earthquake predictions
答案
C
解析
精析综合推断题。原文末段说“改进的建筑技术可以大大减少震波造成的后果”,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/3467905.html
相关试题推荐
EarthquakesWhatcausesearthquakes?Theearth
EarthquakesWhatcausesearthquakes?Theearth
EarthquakesWhatcausesearthquakes?Theearth
EarthquakesWhatcausesearthquakes?Theearth
EarthquakesWhatcausesearthquakes?Theearth
[originaltext]Inancienttimesthemostimportantexaminationswerespoken,
DidtheAncientGreeksandRomanshaveasenseoffashion?Historiansofdre
DidtheAncientGreeksandRomanshaveasenseoffashion?Historiansofdre
Therearemany【B1】______aboutthebeginningofdramainancientGreece.The
Therearemany【B1】______aboutthebeginningofdramainancientGreece.The
随机试题
Manyteachersbelievethattheresponsibilitiesforlearningliewiththest
乳腺癌患者患侧乳腺皮肤出现“酒窝征”的原因是A.癌瘤侵犯Cooper韧带 B
铸铁是工程上用途广泛的一种黑色金属材料,它的以下性能何者不正确?( )A.抗拉
正常成人脾长径不超过A.10cm B.8cm C.12cm D.6cm
人体必需氨基酸包括( )。A.色氨酸 B.赖氨酸 C.苯丙氨酸
律师事务所从事证券法律业务,可以为下列()事项出具法律意见。 Ⅰ.首次公开发
下列不属于深圳证券交易所股价指数的是()。A.综合指数系列 B.成份指数
患者,男,36岁。右下腹疼痛1天.患者1天前无明显诱因出现脐周疼痛,继而转移至右
(2021年真题)某男,49岁。症见大便脓血、里急后重、发热腹痛。医师处以香连
在头面部,行于头侧部的经脉是A.少阳经 B.厥阴经 C.阳明经 D.太阳经
最新回复
(
0
)