首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
财务会计
共用题干 第三篇Listening Device Provides Early
共用题干 第三篇Listening Device Provides Early
题库总管
2019-12-17
27
问题
共用题干第三篇
Listening Device Provides Early Landslide(山崩;地滑;塌方)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 flats 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 niay 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 be 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."
选项
What does"Such natural disasters"in the first paragraph refer to?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。 短文第二段第一、二句提到“滑坡开始时,一个山坡上的土壤或岩石粒子移动,但初期 可能很难辨认。然后山坡在数小时或数分钟内可能变得不稳固”,故选D。 短文第三段倒数第二句提到“……任何一种方法(普通方法)都可能产生错误预警”,故 选C。 根据短文第四段第二句可知,地上凿出的洞而非该装置是用砾石填充的,A项的叙述不 正确。故选A。 此句意为“早期的结果表明它应该提供比现有系统更少的不实证据”,故选B。 positive 意为“确凿的证据”。第5部分:补全短文
转载请注明原文地址:https://ti.zuoweng.com/ti/1uOfKKKQ
相关试题推荐
每道题在左边的题干中给出一套图形,其中有五个图,这五个图呈现一定的规律性。在右
请从四个选项中选出正确的一项,其特征或规律与题干给出的一串符号的特征或规律最为相
请从四个选项中选出正确的一项,其特征或规律与题干给出的一串符号的特征或规律最为相
请从四个选项中选出正确的一项,使得该项的两个词或词组依次代入题干的括号中,能够最
请从四个选项中选出正确的一项,使得该项的两个词或词组依次代入题干的括号中,能够最
请从四个选项中选出正确的一项,其关系与题干给出的词、词组或句子的关系最为相似。
请从四个选项中选出正确的一项,其关系与题干给出的词、词组或句子的关系最为相似。
D根据题干第一、四个图形中的两条水平线可确定答案为D,如图所示:
A将题干第一、四个图形上下叠放,第二、三个图形上下叠放,然后组合可得A项,如图所示:
C题干图形中都含有4个交点,选项中只有C项符合。
随机试题
(46-48题共用题干) 患者,女性,40岁,诉搬重物后腰痛2天,伴右侧下肢后
地下燃气管道埋设的最小覆土厚度符合要求的有()。
关于工程高程控制测量的施测方法,下列说法不正确的是()
新疆被列入国家一级保护动物的品种有( )种。A.116B.80C.28D.20
财务与会计人员在工作过程中发现存在违法犯罪、违反行业自律规则或违反本单位内部制度行为的,应当加以制止,并依法向()报告或举报。 Ⅰ.行业自律组织 ...
对外界抵抗力最强的细菌结构A:核质B:荚膜C:芽胞D:细胞壁E:细胞膜
伴有潜在性糖尿病的高血压患者,不宜选用A.哌唑嗪B.氢氯噻嗪C.卡托普利D.硝苯地平E.尼莫地平
口服缓、控释制剂的特点不包括()。A:可减少给药次数B:可提高病人的服药顺应性C:可避免或减少血药浓度的峰谷现象D:有利于降低肝首过效应E:有利于降低
起吊混凝土预制构件时,吊绳与水平夹角不得小于()。A.30°B.35°C.40°D.45°
某公司2014年1月1日经批准发行3年期到期一次还本并按年付息的债券,面值总额为1000万元,票面利率为8%。如果发行时的市场利率为6%,则该债券的发行价...