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
2012-06-20
59
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.
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://kaotiyun.com/show/Dvf7777K
0
大学英语四级
相关试题推荐
ThelargeAmericanenergyservicecompany,Enron,failedtwoyearsago.IthadbeentheseventhlargestcompanyintheUnitedSt
TheGreenhouseEffectEarth’sclimatehasbeenchangingconstantlyoverits5-billion-yearhistory.Sometimes,theclima
A、At10:30.B、At10:20.C、At11:15.D、At10:45.C此题需做简单运算,由男士的话可知飞机再过45分钟就要起飞了,而且再过5分钟就停止检票了。由女士的话可知现在是10:30,那些人应该10分钟前就到的。这些数字中5分钟
A、agroupofpeopleshehasnevermetbefore.B、agroupofpeopleshehasmetbefore.C、agroupofyoung,juniorpeople.D、agro
Lastsummer,TransportationSecretaryElizabethDoleannouncedanewseatbelt-userule:allthedriversandfrontseatpassenger
A、Tothemanager’soffice.B、Tothepaperbacksection.C、Tothetextbookarea.D、Tothepublishers’indexes.C细节题。当男士说需要一本关于总统选举
Forthispart,youareallowedthirtyminutestowriteacompositiononthetopicMyViewonaGapYear.Youshouldwritenomor
Mostpeoplehavenoideaofthehardworkandworryaboutgoingintocollectionofthosefascinatingbirdsandanimalsthatthey
A、Thelossofthestore.B、Thepossibleharmtothepeoplenearby.C、Thepunishmenttothecrazyman.D、Thereasonforthecrazy
A、Lifecanbemoreenjoyablewithouttelevision.B、Themorefriendswehave,thehappierweare.C、Lifewithoutelectricityisb
随机试题
王国维在《人间词话》中提出了()
艾叶治疗的胎动不安属于( )。黄芩治疗的胎动不安属于( )。
A.横目斜视B.昏睡露睛C.瞳孔散大D.目睛微定E.双睑下垂肝风内动表现是()
属于第二代抗精神病药的是
A、氯雷他定B、富马酸酮替芬C、盐酸雷尼替丁D、奥美拉唑E、西咪替丁在分子结构中含有吡啶环的药物
根据《建筑工程建筑面积计算规范》GB/T50353—2013,半地下室车库建筑面积的计算,正确的是()。【2010年真题】
认知领域的教学目标分为知识、领会、______、______综合和评价等六个层次。
【给定资料】1.党的十九大报告提出,加强思想道德建设。人民有信仰,国家有力量,民族有希望。要提高人民思想觉悟、道德水准、文明素养,提高全社会文明程度。广泛开展理想信念教育,深化中国特色社会主义和中国梦宣传教育,弘扬民族精神和时代精神,加强爱国主义
2013年全国共批准建设用地53.43万公顷,其中,农用地转建设用地37.24万公顷,占用耕地21.96万公顷,同比分别下降13.1%、13.2%、15.3%。批准单独选址和城镇村建设用地同比分别下降20.5%和8.5%。2009-2013年期间平均
SumerianContributionsP1:Beforeabout4500B.C.,lowerMesopotamia,thewholeplainbetweenandoneithersideoftheTigrisa
最新回复
(
0
)