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
外语
Listening Device Provides Landslide(山崩;地滑;塌方)Early Warning A device that provides early warning of a landslide by monitoring
Listening Device Provides Landslide(山崩;地滑;塌方)Early Warning A device that provides early warning of a landslide by monitoring
admin
2011-01-05
65
问题
Listening Device Provides Landslide(山崩;地滑;塌方)Early Warning
A device that provides early warning of a landslide by monitoring vibrations (振动)in soil is being tested by UK researchers. The device could save thousands of lives each year by warning when an area should be evacuated(疏散,撤走), the scientists say. Such natural disasters are common in countries that experience sudden, heavy rainfall(降雨,降雨量), and can also be triggered by earthquakes and even water erosion(腐蚀,侵蚀).
Landslides start when a few particles of soil or rock within a slope start to move, but the early stages can be hard to spot. Following this initial movement, "slopes can become unstable in a matter of hours or minutes, " says Nell Dixon at Southborough University, UK. He says a warning system that monitors this movement "might be enough to evacuate a block of fiats or clear a road, and save lives. "
The most common way to monitor a slope for signs of an imminent (即将发生的) landslide is to watch for changes in its shape. Surveyors can do this by measuring aside directly, or sensors(传感器) sunk into boreholes(钻孔,井眼)or fixed above ground can be used to monitor the shape of a slope. Slopes can, however, change shape without triggering a landslide, so either method is prone to causing false alarms. Now Dixon’s team has developed a device that listens for the vibrations’ caused when particles begin moving within a slope.
The device takes the form of a steel pipe dropped into a borehole in a slope. The borehole is filled in with gravel(砾,沙砾,砾石)around the pipe to help transmit high-frequency vibrations generated by particles within the slope. These vibrations pass up the tube and are picked up by a sensor on the surface. Software analyses the vibration signal to determine whether a landslide may be imminent.
The device is currently being tested in a 6-metre-tall artificial clay embankment(堤岸)in Newcastle, UK. Early results suggest it should provide fewer false positives than existing systems. Once it has been carefully and thoroughly tested, the device could be used to create a complete early-warning system for dangerous slopes.
"Locations with a significant risk of landslides could definitely benefit from a machine like this, " says Adam Poulter, an expert at the British Red Cross. "As long as it doesn’t cost too much, " But, Poulter adds that an early-warning system may not he enough on its own. "You need to have the human communication, " he says. "Making systems that get warnings to those who need them can be difficult. "
Which of the following statements is NOT true of the device, according to Paragraph 4?
选项
A、It is filled in with gravel.
B、It consists of a steel pipe.
C、It is dropped into a borehole filled in with gravel.
D、It is connected to a sensor on the surface.
答案
A
解析
短文第四段第二句提到“钻孔是用砾石填充的”,故A的叙述不正确,故选A。
转载请注明原文地址:https://kaotiyun.com/show/rMQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
Solvingaproblemcanbebrokendownintoseveralsteps.First,theproblemmustbeidentifiedcorrectly.Psychologistsreferto
ActiveinOldAgeKeepsPeopleMobilePeopleover70whoaren’tactivearemorelikelytodevelopproblemswalkingorclimbin
ExerciseWhetherornotexerciseaddstothelengthoflife,itiscommonexperiencethatacertainamountofregularexerci
ExerciseWhetherornotexerciseaddstothelengthoflife,itiscommonexperiencethatacertainamountofregularexerci
ANewMedicinetoTreatBothAIDSandHepatitisBAmedicineapprovedlastmonthtotreatAIDS(艾滋病)alsoshowspromiseagain
FDAhasapprovedtheplanofusingHIVtocurecancerinhumans.TheHIVvirusisanexcellentwarriortofightthebody’simmu
DungtodeathFieldsacrossEuropearecontaminatedwithdangerouslevelsoftheantibiotics(抗生素)giventofarmanimals.T
Thelittlegirlgraspedhermother’shandasshecrossedthestreet.
Stinking(发臭的)BusesStinkingbusesjam(挤满)thecrowdedstreet.Drivers(51)atoneanotherandhonk(鸣喇叭)theirhorns.Smog(烟雾)hurt
随机试题
在计算企业应纳税所得额时,可以加计扣除的项目是_________、__________、__________、________。
进入第二产程的主要标志是
程序,即程序文件,是为进行某项活动所规定的途径。()
物质的量为10.0mol的某一单原子理想气体,在被压缩的过程中,外力对它做功为2.09×102J,使其温度升高1.00℃,则此过程中气体的内能增量和吸收的热量分别为()。
()适用于向国内外宣布重要事项或者法定事项。
试全面比较连续分配和离散分配方式。
根据解释的效力,可以把刑法解释分为()(2014年一专一第2题)
党的十八大提出全面建成小康社会的目标,既有质的要求,也有量的指标。这一目标的制定充分说明()
在窗体上画一个名称为Dirl的目录列表框,一个名称为File1的文件列表框。当改变当前目录时,文件列表框中同步显示目录列表框中当前被打开目录中的文件,则所使用的事件过程是()。
Manychildrenfirstlearnthevalueofmoneybyreceivinganallowance.Thepurposeistoletchildrenlearn【C1】______experienc
最新回复
(
0
)