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
Earthquake Every year earthquakes are responsible for a large number of deaths and a vast amount of destruction in various
Earthquake Every year earthquakes are responsible for a large number of deaths and a vast amount of destruction in various
admin
2010-01-14
41
问题
Earthquake
Every year earthquakes are responsible for a large number of deaths and a vast amount of destruction in various parts of the world. Most of these damaging earthquakes occur either in a narrow belt which surrounds the Pacific Ocean or in a line which extends from Burma to the Alps in Europe. Some of the destruction is directly caused by the quake itself. An example of this is the collapse of buildings as a result of the quake itself. Other damage results from land-slides or major fires which are initiated by the quake.
There are about a million quakes a year. Fortunately, however, not all of them are destructive. The intensity of an earthquake is measured on the Richter Scale, which goes from 0 upward. The highest scale recorded to date is 8.9. Major damage generally occurs from quakes ranging upwards from 6.0.
The actual cause of the quake itself is the breaking of rocks at or below the earth’s surface. This is produced by pressure which scientists believe may be due to a number of reasons, two of which are the expansion and contraction of the earth’s crust and continental drift.
In order to limit the damage and to prevent some of the suffering resulting from earthquakes, scientists are working an ways to enable accurate prediction. Special instruments are used to help people record, for example, shaking of the earth. Scientists are trying to find methods that will enable them to indicate the exact time, location and size of an earthquake.
Certain phenomena have been observed which are believed to be the signs of imminent earthquakes. These include strange behaviours of some animals, the changes in the content of mineral water, etc. The magnetic properties of rocks may also display special pattern before major earthquakes happen.
*
选项
答案
A
解析
本段介绍了科学家为预测地震所做的一些工作。
转载请注明原文地址:https://jikaoti.com/ti/TwOsFFFM
本试题收录于:
职称英语理工类基础题库职称英语分类
0
职称英语理工类基础
职称英语
相关试题推荐
Onaveragewomenlivedlongerthanmen100yearsago.Lifewasnoteasyformanychildrenliving100yearsago.
Whendoessleepwalkingusuallyoccur?You’dbettergoandseeadoctorifyou
Theyhadafarbetteryieldthananyotherfarmmilesawayaroundthisyear.
Moods,saytheexperts,areemotionsthattendtobecomefixed,influencingone’soutlookforhours,daysorevenweeks.That’s
LudwigVanBeethovenLudwigVanBeethoven,amajorcomposerofthenineteenthcentury,overcamemanypersonalproblemstoac
BusinessMarketsAreBigBusinessInternationallyBusiness-to-businessmarketingisasignificanteconomicactivityinternat
PromisingResultsfromCancerStudyAnewexperimentalvaccine(疫苗)hasshownpromisingresultsinthefightagainstlungcanc
ExploreroftheExtremeDeepOceanscovermorethantwo-thirdsofourplanet.Yet,justasmallfractionoftheunderwaterw
ExploreroftheExtremeDeepOceanscovermorethantwo-thirdsofourplanet.Yet,justasmallfractionoftheunderwaterw
Thesepaintingsareconsideredbymanytobe(authentic).
随机试题
A.纤维膜B.血管膜C.视网膜D.晶状体E.玻璃体眼球中起保护作用的是
与肥大细胞或嗜碱性粒细胞结合,并介导I型变态反应的抗体类型是()
根据特别行政区基本法,全国人大常委会依法可以在下列哪些情况下将特区立法会制定的法律发回使之失效?()
可行性研究中对项目进行的评价包括( )。
经常采用的货币政策中介目标不包括()。
下列不属于创新型货币政策工具的是()。
根据《合同法》的规定,下列关于不同种类违约责任相互关系的表述中,正确的有()。
平衡计分卡使管理者能够把长期行为与短期行为联系在一起的程序包括()。
下列说法符合土地增值税优惠政策规定的有()。
2016年上半年,北京市六大高端产业功能区(以下简称“六高”)规模以上法人单位实现收入28811.4亿元,占全市的比重超过五成(51.5%),较上年同期提高2.9个百分点。其中,工业实现收入占全市工业的比重超过六成(62.4%),较上年同期提高2.3个百分
最新回复
(
0
)