首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Eastern Quakes Can Trigger Big Shakes In the first week of November 2011 , p...
Eastern Quakes Can Trigger Big Shakes In the first week of November 2011 , p...
admin
2020-12-24
20
问题
Eastern Quakes Can Trigger Big Shakes
In the first week of November 2011 , people in central Oklahoma experienced more than two dozen earthquakes. The largest, a magnitude (量)5.6 quake, shook thousands of fans in a college football stadium, caused cracks in a few buildings and scared many people who had never felt a quake before. Oklahoma is not an area of the country famous for its quakes. If you watch the news on TV, you see reports about all sorts of natural disasters. But the most dangerous type of natural disaster, and also the most unpredictable, is the earthquake.
Researchers at the US Geological Survey ( USGS) estimate that several million earthquakes occur globally each year. That may sound scary, but people don’t feel many of them because they happen in remote and unpopulated regions. Many quakes happen under the ocean, and others have a very small magnitude.
Scientists know about small, remote quakes only because of very sensitive electronic devices called seismometers (地震仪).These devices detect and measure the size of ground vibrations (震颤)produced by earthquakes. Altogether, USGS researchers use seismometers to identify and locate about 20, 000 earthquakes each year.
Although earthquakes can happen anywhere in the world, really big quakes occur only in certain areas. The largest ones register a magnitude 8 or higher and happen, on average, only once each year. Such big ones typically occur along the edges of Earth’s tectonic plates (构造板块)
Tectonic plates are huge pieces of Earth’s crust (夕卜壳),sometimes many kilometers thick. Often, edges of these plates temporarily lock together. When plates push and scrape (擦)past each other earthquakes occur. On average, tectonic plates move very slowly — about the same speed as your fingernails grow.
But sometimes earthquakes rumble (轰轰作响)through portions of the landscape far from a plate’s edges. Although less expected, these “mid-plate” small earthquakes can do substantial damage. Some of the biggest known examples hit the eastern half of the United States two centuries ago. Today, scientists are still puzzling over why the quakes occurred and when similar ones might occur.
Oklahoma is an area often experiencing natural disasters.
选项
A Right B Wrong C Not mentioned
答案
A
解析
根据第一段倒数第二句:If you watch the news on TV, you see reports about all sorts of natural disasters.(如果你经常看电视的话,你会看到各种各样的关于自然灾害的报道。)
转载请注明原文地址:https://ti.zuoweng.com/ti/v79QKKKQ
相关试题推荐
“Lucky”LordLucan—AliveorDead? On8thNovember1974LordLucan,aBrit...
“Lucky”LordLucan—AliveorDead? On8thNovember1974LordLucan,aBrit...
“Lucky”LordLucan—AliveorDead? On8thNovember1974LordLucan,aBrit...
Singapore 1Singaporeisanindependentcity-stateinsoutheasternAsia,con...
Singapore 1Singaporeisanindependentcity-stateinsoutheasternAsia,con...
共用题干 1.OnNovember19,1863,AbrahamLincolnwenttoGettysburginPennsylvani...
共用题干 1.OnNovember19,1863,AbrahamLincolnwenttoGettysburginPennsylvani...
共用题干 1.OnNovember19,1863,AbrahamLincolnwenttoGettysburginPennsylvani...
共用题干 第三篇On8thNovember1974LordLucan,aBritisharistocrat,vanished.Theda...
共用题干 第三篇On8thNovember1974LordLucan,aBritisharistocrat,vanished.Theda...
随机试题
男性,52岁。幼年出麻疹后咳嗽迁延不愈,时常有脓痰和少量咯血。曾经支气管造影证实
下列有关税务师的权利与义务的表述,正确的有()。
关于总投资收益率的描述,下列选项中错误的是()。
某工程施工过程中,3名工人在大钢模修整场地休息,大风吹倒大钢模砸向工人导致3人当
高血压的全面治疗方案包括
肝气犯胃型呕吐的特点是A、清水B、酸腐量多,气味难闻C、苦水、黄水D、浊痰涎沫E、呕吐吞酸,嗳气频繁
下列各项中,不属于肺痨演变规律的是A:阴虚失润B:阴虚火旺C:日久耗气D:因虚致瘀E:阴损及阳
患者女性,19岁。近两周来出现发热,体温38℃左右,伴恶心、呕吐、腹泻。随后出现心悸、胸痛、呼吸困难、昏厥等。体检:面色苍白,精神萎靡。心率40次/分,规...
可以用于判断两种商品或者服务是否具有替代关系或互补关系的指标是()。A.需求价格弹性B.需求交叉弹性C.供给价格弹性D.需求收入弹性
良好的声誉风险管理已经成为了商业银行的主要竞争优势之一,有助于提升商业银行的盈利能力和实现长期战略目标。()