微信:liulangji8899
  • 托福频道
    • 托福阅读
    • 托福听力
    • 托福写作
    • 托福口语
    • 托福真题
    • TPO
  • 雅思频道
    • 雅思阅读
    • 雅思写作
    • 剑桥雅思
    • 雅思听力
    • 雅思真题
    • 雅思口语
    • 雅思电子书
  • SAT频道
    • 2016SAT真题
    • 2017SAT真题
    • 2018SAT真题
    • 2019SAT真题
    • 2020SAT真题
    • 2021SAT真题
    • 2022SAT真题
  • AP频道
    • AP化学真题
    • AP统计学真题
    • AP生物真题
    • AP英语语言真题
    • AP心理学真题
    • AP物理真题
    • AP经济学真题
  • ACT真题
导航
TOEFL IELTS SAT真题 AP真题 ACT真题
托福资讯
  • 托福阅读
  • 托福听力
  • 托福写作
  • 托福口语
  • 托福真题
  • TPO
托福阅读 托福听力 托福写作 托福口语 托福真题 TPO +
当前位置: 首页 > 托福频道 > 托福阅读

2015年5月30日托福阅读真题+题目+答案:Earthquake Prediction

2020-08-13 来源:toefl.socool100.com

2015年5月30日托福阅读真题+题目+答案:Earthquake Prediction

2015年5月30日托福阅读真题+题目+答案:Earthquake Prediction

1. Accurate prediction of earthquakes is not currently possible, although intensive research is proceeding in many areas.

2. Two types of earthquake prediction are theoretically possible. The first type is long-term forecasting, in which the probability of an earthquake along a particular segment of a within a certain time interval is calculated by studying seismic gaps and historical records of earthquakes that have occurred along that fault segment. By plotting the number of earthquakes within specific time intervals against their magnitudes, diagrams can be constructed for a local area. From this plot it is possible to determine the recurrence interval, or the average time interval between earthquakes of a specific magnitude. Predictions can then be made that an earthquake of that magnitude has a high probability of occurrence within a specified time interval, if the date of the last earthquake is known.

3. Research leading to short-term forecasting, which involves a shorter time interval, has been focused on precursors observed prior to previous earthquakes. Precursors are physical or chemical phenomena that occur in a typical pattern before an earthquake. These phenomena include changes in the velocity of seismic waves, the electrical resistance of rocks, the frequency of the usually minor preliminary earthquakes (foreshocks), the deformation of the land surface, and the water level or water chemistry of wells in the area. Many of these precursors can be explained by a theory called the dilatancy model. Under this hypothesis, rocks in the process of strain along a fault show significant dilation or swelling before rupture. This volume increase is caused by the opening of microcracks, which are minute failure zones in weaker mineral grains in the rock and along grain boundaries. Groundwater flows into the highly stressed areas during the formation of microcracks. These changes in density and water content affect the ability of the rock to transmit seismic waves and conduct electricity. Therefore, seismic-wave velocity and electrical resistance progressively change as the overall rupture along the fault draws near. Localized changes in land-surface elevation are also related to volume changes at depth. An area of recent uplift along the San Andreas Fault near Los Angeles, which has been named the Palmdale Bulge, is being monitored in great detail as a possible indicator of a future earthquake.

。。。。。此处省略余下原文!

托福阅读真题题目:

1..The word specified in the passage is closest in meaning to

A. probable

B. stated

C. short

D. typical

2..According to paragraph 2, all of the following information is used in the process of long-term earthquake prediction EXCEPT the

A. analysis of seismic gaps

B. record of past earthquakes in the fault area

C. date of the last recorded earthquake in the area

D. pattern of earthquake activity in other nearby fault segments

3..According to paragraph 2, long-term forecasting can be used to predict which of the following

A. The influence of earthquake activity in one segment of the fault area on other segments

B. The frequency with which earthquakes of a certain size will occur

C. The possible date of the next earthquake

D. The magnitude of the next earthquake

4..The word focused in the passage is closest in meaning to

A. dependent

B. funded

C. concentrated

D. published

。。。。。此处省略余下题目和答案!

 

2015年5月30日托福阅读真题+题目+答案:Earthquake Prediction,完整版下载,10元有偿!

微信扫码支付

支付宝扫码支付

资料下载说明
  • 一般发网盘,邮箱,微信
  • 支付成功后,请加微信客服:liulangji8899
  • 微信客服一般都能及时回复
  • 文章关键词
  • 2015年5月30日托福阅读真题+题目+答案:Earthquake Prediction
  • 你可能感兴趣的文章
    • 托福阅读真题+题目+答案:Evolution in Peppered Moths
    • 托福阅读真题+题目+答案:The Development of Land Flora
    • 托福阅读真题+题目+答案:Dams and Flood Control
    • 托福阅读真题+题目+答案:Bumblebee Heat Regulation
    • 2021年6月22日托福阅读真题+题目+答案:The Early Cyclades 
    微信客服
    头条推荐
    • 2020年7月11日雅思小作文范文:The table below shows oil production in several African countries (barrels per day
    • 2020年7月11日雅思阅读真题+题目+答案:Stress of Workplace
    • 剑桥雅思真题15+答案解析PDF下载(高清无水印完整版)
    • 2013年1月5日雅思小作文题目:The charts give information about the reasons why people leave the UK and why peopl
    • 2014年托福阅读真题+题目+答案解析:The Beringia Landscape
    • 2014年托福阅读真题+答案解析+翻译:Agricultural Society in Eighteenth-Century British America

    托福资料

    托福听力真题 托福阅读真题 托福写作范文 托福口语范文 托福TPO 托福电子书

    雅思资料

    雅思阅读 雅思写作 剑桥雅思 雅思听力 雅思口语 雅思电子书

    SAT资料

    2016SAT真题 2017SAT真题 2018SAT真题 2019SAT真题 2020SAT真题 2021SAT真题 2022SAT真题

    AP资料

    AP化学真题 AP统计学真题 AP生物真题 AP英语语言真题 AP心理学真题 AP物理真题 AP经济学真题
    添加客服微信
    Email : foeveryoung18@outlook.com (I will reply you within 1-8 hours)
    皖ICP备2022007860号
    ©2020 socool00.com
    皖ICP备2022007860号
      热门资料
    • 托福真题
    • 雅思真题
    • SAT真题
    • AP真题
    添加客服微信
    • Email : foeveryoung18@outlook.com (I will reply you within 1-8 hours)
    • 皖ICP备2022007860号