首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
As scientists learn more about the causes of earthquakes, they become better able to predict them. First of all, they know that
As scientists learn more about the causes of earthquakes, they become better able to predict them. First of all, they know that
admin
2015-10-30
17
问题
As scientists learn more about the causes of earthquakes, they become better able to predict them. First of all, they know that quakes are likely to occur in areas where the tectonic plates(地层地壳板块)push against each other.
They study these areas closely, using different instruments. They measure the vibrations of the earth with seismographs(地震仪), which record on rolls of paper all movements, both large and small.
Scientists usually use the Richter scale(里希特震级仪)named after a famous seismologist(地震学家), for these measurements. When an earthquake measures over 4 ~ 5 on the Richter scale, it is strong enough to cause damage. Scientists have determined that an area is not likely to have a large earthquake when many small quakes have been occurring. When the small quakes stop, then pressure builds and a strong quake is more likely.
There are several other ways to predict earthquakes. Scientists can measure the tiny changes in the tilt(倾斜)of the land that happen before earthquakes occur. Increases in the amount of radon(氡), a substance found in deep wells, as well as a higher level of water in the wells, can also mean that an earthquake is likely to occur. In addition, scientists have found that some animals, like dogs, behave strangely before an earthquake, they become nervous and howl(号叫). Seismologists have correctly predicted several earthquakes. In 1975, they said that an earthquake would occur in Liaoning Province, China, one month, and then one hour, before it happened. In 1978, Russian scientists predicted an earthquake in the Altai Mountains six hours before it occurred. However, not all earthquakes are predictable, and a system for predicting is not yet perfected. Nothing on this earth is certain. Although people who live in California and Japan live with the possibility of a serious quake, perhaps the next strong earthquake will occur somewhere outside the "Ring of Fire".
According to the information in Para. 1 seismograph is______.
选项
A、a computer like electronic instrument for predicting earthquakes
B、a special instrument for recording and measuring the vibrations of the earth
C、an instrument which seismologists use to make studies on the causes of earthquakes
D、an instrument with which seismologists measure the pressure between tectonic plates
答案
B
解析
文章第一段第四句“They measure thevibrations of the earth with seismographs(地震仪),which record on rolls of paper all movements,both large and small.”解释了seismographs的意思,故B正确。
转载请注明原文地址:https://jikaoti.com/ti/5tpGFFFM
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
OnthefourthThursdayofNovember,everyyear,AmericanscelebrateThanksgivingDay.Thedayisanationalholidaywhichisset
Lastyear,myclassmateJaneandIgraduatedfromanordinarynormaluniversity.Likemostofthestudentswhohadjuststepped
IntheUnitedStatesthemostpopularformoffolkdancingsincetheearlydayshasbeensquaredancing.Inearlytimes,whenme
Tousitseemssonaturaltoputupanumbrellatokeepthewateroffwhenitrains,butactuallytheumbrellawasnotinvented
Mart’sstoryinChinabeganmanythousandsofyearsago.RemainsofanearlyformofmandiscoveredinChina,knownasPekingMa
I’mfamiliar______themusicthattheyaredancing
Theatmosphereandoceansarenottheonlypartsoftheenvironmentbeingdamaged.Rainforestsarebeingquicklydestroyedasw
Socialcustomsandwaysofbehavingchange.Thingswhichwereconsideredimpolitemanyyearsagoarenowacceptable.Justafew
Youhavebeenbadlyinjuredinacaraccident.Itisnecessarytogiveyouabloodtransfusionbecauseyoulostagreatdealof
ContrarytoitsrathernegativereputationintheWest,pigsinChinesecultureareasignofkindnessandgenerosity.Pigscare
随机试题
其母亲妊娠史中最能提供诊断线索的是体检最能支持诊断的发现是
下列关于顺式作用元件的叙述哪项是错误的
绝热层基础是在基础的()设置隔热保温层。
合同风险的管理与防范措施之一是风险的分散和转移,以下选项中属于风险的分散和转移措施的是()。
某装饰公司承接了哈尔滨某四星级酒店工程(含精装修工程),在施工过程中发生如下事件:事件一:施工单位施工组织设计中,屋面防水材料选型采用APP改性沥青防水卷材;在屋顶坡度18%的斜屋面上采用平行屋脊方向铺贴;防水保护层采用细石混凝土,并留设分格缝,分格缝间
理财产品销售前,要准备与销售有关的合同文本,具体包括()。
根据下列文字资料。回答问题。2007年2月8日,北京移动全球通“畅听99”单向收费套餐正式对用户办理。与此同时,北京移动也对神州行用户的资费进行了进一步优惠。这次推出的全球通“畅听99”套餐共分99元、139元、199元和299元四档,
社会生产是连续进行的,这种连续不断重复的生产就是再生产。社会再生产的核心问题是社会总产品的实现问题,它内在包含了
在C++语言中函数返回值的类型是由()决定的。
David______forawhileandwenttowhereJohnstoodwithSusan.
最新回复
(
0
)