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
49
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 passage, the earthquake occurred in China’s Liaoning Province in 1975 ______.
选项
A、was twice predicted by seismologists
B、took all the people in the area by surprise
C、was followed by many small vibrations of the earth
D、was correctly predicted by Russian seismologists
答案
A
解析
文章第二段第六句提到“In 1975,they said that an earthquake would occur inLiaoning Province,China,one month,and thenone hour,before it happened.”此题的关键是读出“then one hour”是第二次预测。故A正确。
转载请注明原文地址:https://kaotiyun.com/show/bAYC777K
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
Inanagewhenwastetodaymeansalacktomorrow,makinguseofeveryavailableresourcebecomesmoreandmoreimportant.Ascoa
It’sanannualback-to-schoolroutine.Onemorningyouwavegoodbye,andthat【21】eveningyou’reburningthemid-nightoilinsym
Ithasalwaysbeenthe______ofourfirmtoencourageworkerstotakepartinsocialactivities.
Weareinterestedintheweatherbecauseit【21】ussodirectly—whatwewear,【22】wedo,andevenhowwefeel.Geographers,however
Theword"Okay"isknownandusedbymillionsofpeopleallovertheworld.Still,languageexpertsdonotagreeonwhereitcam
Lastyear,myclassmateJaneandIgraduatedfromanordinarynormaluniversity.Likemostofthestudentswhohadjuststepped
OnthemorningofNovember18,1735,anearthquakeshookBoston,Massachusetts.JohnWinthrop,aprofessoratHarvardCollege,fe
TherePicturesfromouterspacenowshowushowmuchlandhaschangedonearth.TheseimagesaretakenbyLandsat7,agovernmen
Tousitseemssonaturaltoputupanumbrellatokeepthewateroffwhenitrains.Butactuallytheumbrellawasnotinvented
Youhavebeenbadlyinjuredinacaraccident.Itisnecessarytogiveyouabloodtransfusionbecauseyoulostagreatdealof
随机试题
风湿性心脏病心力衰竭服用地高辛13天,出现恶心、呕吐,室性期前收缩二联律,除停用洋地黄外,治疗应首选()
A.Allflightshavebeencancelledbecauseofthesnowstorm,somanypassengerscoulddonothingexcepttakethetrain.B.Seldo
原核生物基因表达调控的乳糖操纵子系统属于
视束病变可见视放射病变可见
在确认所有的计算结果无误后,应根据具体情况选用()。
根据《水利工程建设项目管理规定》(水建[1995]128号),水利工程建设项目类型按其功能和作用分为()。
根据《建设工程安全生产管理条例》,建设单位应当()将保证安全施工措施报送建设工程所在地的县级以上人民政府建设行政主管部门或其他有关部门备案。
下列纳税人,必须办理一般纳税人登记的是()。
教师为履行教育教学职责而必须具备的最基本的权利是()。
TheBillofRightsisthetermusedfor______totheConstitutionoftheUnitedStates.
最新回复
(
0
)