首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Since ancient times, the destructive effects of earthquakes on human lives and property have encouraged the search for reliable
Since ancient times, the destructive effects of earthquakes on human lives and property have encouraged the search for reliable
admin
2014-09-30
25
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.
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://kaotiyun.com/show/BNv7777K
0
大学英语四级
相关试题推荐
VisitorstoBritainmayfindthebestplacetosamplelocalcultureisinatraditionalpub.Ateamofresearchershave(1)______
VisitorstoBritainmayfindthebestplacetosamplelocalcultureisinatraditionalpub.Ateamofresearchershave(1)______
VisitorstoBritainmayfindthebestplacetosamplelocalcultureisinatraditionalpub.Ateamofresearchershave(1)______
VisitorstoBritainmayfindthebestplacetosamplelocalcultureisinatraditionalpub.Ateamofresearchershave(1)______
A、Herresearchpapers.B、Thecomingexam.C、Herswimmingclass.D、Herschoolfee.A
Sometimesthebiggestfindsarethesmallestfinds.Researchersexamininga(26)______ofsiltstone(粉砂岩)takenfromgroundalongth
Sometimesthebiggestfindsarethesmallestfinds.Researchersexamininga(26)______ofsiltstone(粉砂岩)takenfromgroundalongth
随机试题
状态转换方法目前主要有三种实现方法:____________、有色Petri-Net和语言/应用编程接口。
患者男,32岁。自小固执、学习不好就找老师的原因,不爱和别人交往,总爱猜疑别人,认为自己是最好的,对侮辱和伤害总耿耿于怀。最可能的诊断是
对首关消除描述正确的是
A、艾地苯醌B、石杉碱甲C、米氮平D、茴拉两坦E、银杏叶提取物缓解因胆碱神经功能缺陷所引起的记忆和认识功能障碍药物是
工程量清单应由()提供。
施工项目管理班子成员编制的施工项目成本计划如果达不到目标要求,则应(),并重新编制成本计划。【2010年考试真题】
2014年年初某企业“利润分配一未分配利润”科目借方余额20万元,2014年度该企业实现净利润为160万元,根据净利润的10%提取盈余公积,2014年年末该企业可供分配利润的金额为()万元。(2015年)
我国教育家陶行知认为幼儿教育应解放儿童的()。
Today’scollegestudentsaremorenarcissisticandself-centeredthantheirpredecessors,accordingtoacomprehensivenewstud
InAmericanbusinessmeetings,peopleareexpectedtoparticipateverbally(口头上).Orelseothersmaythinkthattheyareuninter
最新回复
(
0
)