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
41
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
邓小平指出:“现在虽说我们也在搞社会主义,但事实上‘不够格’。”这种“不够格”,
光明穴不可以治疗 A.夜盲 B.目痛 C.下肢痿痹 D.发热 E.乳房
保税区进出境货物备案清单适用于()。
在信贷业务中经常运用的担保方式不包括()。
在有限的资源约束下,采用风险为本的监管是一种最具成本效益的选择,其发挥的重要作用有( )。A.明确了非现场监管和现场检查的职责,使二者分工更清晰、结合更紧密
位于上颌骨前面,眶下孔下方骨面的窝称为A.关节突B.关节窝C.翼腭窝D.翼肌窝E.尖牙窝
下列工作中,建设单位在编制设计任务书之前应完成的是()。A.动拆迁B.建设项目可行性研究C.指定投资计划D.选择建筑师
存款类金融机构提供的会计信息应当反映与该金融机构财务状况、经营业绩和现金流量有关的所有重要交易或者事项,这是金融机构会计信息质量的()要求。 A.可靠...
驾驶机动车在进出非机动车道时,最高速度不能超过多少?A、30公里/小时B、40公里/小时C、60公里/小时D、50公里/小时
《社会工作专业人才队伍建设中长期规划(2011—2020年)》提出的社会工作专业人才队伍建设的十大重点工程之一是社会工作专业人才培训基地和教材建设工程,此...