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
48
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
买方信用限额是由( )。 A、买方进口金额决定的 B、被保险人申请的 C
在使用内部报酬率法进行固定资产投资决策时方案可行的标准是内部报酬率要()。
患者,女性,24岁。口服吲哚美辛数片后觉胃部疼痛,6小时前排黑色成形便约100g
在债权保全中,代位权人行使代位权应以( )。 A.自己的名义 B.以债务人
医学模式转变在医学伦理学方面的重要性是指A.促进医学思维方式的变革B.促进医师知识结构的现代化C.提高社会防治疾病的地位D.加速了祖国医学的整理和提高E
品德的心理结构包括道德认知、道德行为和()。A.道德素质B.道德情感C.道德修养D.道德学习
财务顾问的工作档案和工作底稿应当真实、准确、完整,保存期不少于()年。A、5B、10C、15D、20
下列对PI描述错误的是A.PI相互间具有交叉耐药性B.为肝酶CYP3A4及其他同工酶的抑制药C.PI适合单独应用,也可以和NRTI,NNRTI或另一种PI联
商品住宅小区内的道路,属于()。(2012年真题)A.原房地产开发企业所有B.物业服务所有C.业主所有D.企业与物业服务共有
关于个人贷款的意义,下列说法中正确的有( )。A.可以为商业银行带来新的收入来源B.满足城乡居民的消费需求C.繁荣金融行业D.可以帮助银行分散风险E.