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共用题干 Eastern Quakes Can Trigger Big Sha

考试题库2022-08-02  14
问题 共用题干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 5 .6 quake,shook thousands of fans in a college football stadium,caused cracks in a few buildings and rattled the nerves of 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一 hurricanes,tornadoes,flooding and wildfires,to name a few. But the most dangerous type of natural disaster,and also the most unpredictable,is the earthquake.
Researchers at the U. S. Geological Survey estimate that several million earthquakes rattie the globe each year. That may sound scary,but people don't feel many of the tremors because they happen in remote and unpopulated regions.Many quakes happen under the ocean, and others have a very small magnitude,or shaking intensity.
A magnitude 5.8 earthquake that struck central Virginia the afternoon of August 23, 2011,was felt from central Georgia to southeastern Canada. In many urban areas,including Washington,D.C.,and New York City(Wall Street shown),people crowded the streets while engineers inspected buildings.
Scientists know about small,remote quakes only because of very sensitive electronic devices called seismometers.These devices detect and measure the size of ground vibrations
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.
Tectonic plates are huge pieces of Earth's crust,sometimes many kilometers thick. These plates cover our planet's surface like a jigsaw puzzle. Often,jagged edges of these plates temporarily lock together. When plates jostle and scrape past each other,earthquakes occur. On average,tectonic plates move very slowly一about the same speed as your fingernails grow.
But sometimes earthquakes rumble through portions of the landscape far from a plate's edges. Although less expected,these”mid-plate” tremors can do substantial damage. Some of the biggest known examples rattled 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.The earthquake that hit the eastern half of the United States two centuries ago is the biggest“mid-plate” one in history.A: RightB: WrongC: Not mentioned
选项 The earthquake that hit the eastern half of the United States two centuries ago is the biggest“mid-plate” one in history.
A: Right
B: Wrong
C: Not mentioned
答案 C
解析 题干意为“俄克拉荷马是一个经常遇到自然灾害的地区。”关键词为often，经 常。根据文中第一段第三、四句“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一 hurricanes, tornadoes, flooding and wildfires, to name a few.”可知俄克拉荷马并不因地震 而闻名，其他类型的灾难也很少在电视上看到，由此可判断俄克拉荷马并不受灾难的眷顾。故此题说法为“错误”的。
题干意为“地震是最不可预测的自然灾害。”根据文中第一段最后一句“But the most dangerous type of natural disaster,and also the most unpredictable,is the earthquake.”可知，地震是最难预测的自然灾难。故此题说法为“正确”的。
题干意为“人们能感觉到几乎所有的地震。”关键字是few。 few是几乎没有的意思，表否定，与a few不同。文中第二段第二句“. . . but people don't feel many of the tremors because they happen in remote and unpopulated regions.”说明，在人迹罕至的地区发生的地震，人们是感觉不到的。故此题说法为“错误”的。
题干意为“地震仪能确认和定位中国的很多地震。”文中并未提及中国。故此说法为“未提及”的。
题干意为“八级或以上的地震基本上都发生在板块边缘。”关键字seldom, 这也是一个表否定的词汇。文中第五段第二、三句“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.”明确指出，八级或更大的地震一般发生在地壳板块边缘。故此题说法为“正确”的。
题干意为“当板块移动时就会发生地震。”根据文中第六段倒数第二句 “When plates jostle and scrape past each other earthquakes occur.”可知，板块互相挤压时才会发生地震，而不是板块一动就地震。故此题说法为“错误”的。
题干意为“200多年前袭击美国东半部的地震是最大的板块中间类型的地震。”文中并未提及 200多年前袭击美国东半部的地震是最大的板块中间类型的地震。故此说 法为“未提及”的。
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