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
52
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. "
What does "Such natural disasters" in the first paragraph refer to?
选项
A、Sudden, heavy rainfall.
B、Earthquakes.
C、Water erosion.
D、Landslides.
答案
D
解析
短文第一段第一句提到了山体滑坡,此处的自然灾害指的是上文的山体滑坡,故选D。
转载请注明原文地址:https://kaotiyun.com/show/0MQd777K
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
ActiveinOldAgeKeepsPeopleMobilePeopleover70whoaren’tactivearemorelikelytodevelopproblemswalkingorclimbin
ExerciseWhetherornotexerciseaddstothelengthoflife,itiscommonexperiencethatacertainamountofregularexerci
Theirparentsoncelivedunderverysevereconditions.
Single-parentKidsDoBestSinglemumsarebetteratraisingtheirkidsthantwoparents—atleastinthebirdworld.Mother
Lookingtohelptheenvironment?Considerthefollowingsimpleideas.Turnoffelectricaldeviceswhenthey’renotbeinguse
ANewMedicinetoTreatBothAIDSandHepatitisBAmedicineapprovedlastmonthtotreatAIDS(艾滋病)alsoshowspromiseagain
DungtodeathFieldsacrossEuropearecontaminatedwithdangerouslevelsoftheantibiotics(抗生素)giventofarmanimals.T
HealthEducation1Healtheducationisthepartofhealthcarethatisconcernedwithpromotinghealthybehavior.Aperson’sbeh
Thelittlegirlgraspedhermother’sarmasshecrossedthestreet.
Attemptshavebeenmadefornearlythreedecadestoincreasetheamountofprecipitationfromcloudsbyseedingthemwithsalto
随机试题
小儿惊厥首要的治疗原则是
下列关于马钱子叙述错误的是
35岁,已婚,因子宫肌瘤行子宫全切除术。因一侧卵巢为良性囊性畸胎瘤予以切除,另侧卵巢外观正常予以保留。本例符合实际情况的是下列哪项
允许权证持有人以与主债券相同的价格和收益率向发行人购买额外债券的欧洲债券是( )。
某宗物业从成交之日起分期付清,首期付款6万元,半年后付款24万元,假设月利率为0.5%,则该宗物业在其成交日期一次付清的价格为()万元。
Ibelieveyouwillhaveawonderfultimehere______yougettoknoweveryoneelse.
大量研究结果表明,短时记忆的容量为()组块。
我国最早的地理学著作《禹贡》,实际上产生于战国后期,但对历史地理现象的注意和记录在更早的著作中已可找到例证。成书于公元1世纪的《汉书.地理志》既是一篇内容丰富的当代地理著作,也堪称中国第一篇历史地理著作,因为它所记述的对象不限于西汉一朝,而是“采获旧闻,考
在等量条件下,以下食物中含碘最多的是()。
在面向对象设计中,(31)可以实现界面控制、外部接口和环境隔离。(32)作为完成用例业务的责任承担者,协调、控制其他类共同完成用例规定的功能或行为。(31)
最新回复
(
0
)