Listening device provides landslide early warning
A device that provides early warning of landslide by monitoring vibrations 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, the scientists say. Such natural disasters are common in countries that experience sudden, heavy rainfall, and can also be triggered by earthquakes and even water erosion.
The most common way to monitor a slope for signs of an imminent landslide is to watch for changes in its shape. Surveyors can do this by monitoring a site directly, or sensors sunk into boreholes or fixed above ground can be sued 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 Nixons team has developed a device that listens for the vibrations caused when particles begin moving within a slope.
The device is currently being tested in a 6-metre-tall artificial clay embankment 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.
1. What does Such natural disasters in the first paragraph refer to?
B. Earthquakes
D. Landslides
A. The initial movement is hard to spot
C. They can be destructive in a matter of hours or minutes
3. Why do researchers develop a new device to monitor signs of landslides?
B. because the new device can be sunk into boreholes or fixed above ground
D. because the common methods are useless
A. it is filled in with gravel
C. It is dropped into a borehole filled with gravel
5. According to the context, what does the word positives in the fifth paragraph mean?
B. evidences
D. predictions
英语六级听力必备的词汇
英语六级的听力技巧
英语六级听力成功指南第二十二期
英语六级听力原文及音频
英语六级四十天突破讲义与笔记五
英语六级听力精练短对话六
英语六级听力考试讲义与笔记三
英语六级听力考试讲义与笔记五
英语六级四十天突破讲义与笔记六
英语六级考试听力原题
英语六级四十天突破讲义与笔记一
英语六级听力精练短对话四
英语六级听力精讲班讲义一
英语六级考试听力答案
英语六级听力高频词E篇
英语六级听力高频词G篇
英语六级听力短对话试题解析
英语六级听力的原题
英语六级听力考前串讲备考资料
英语六级听力成功指南第二十五期
英语六级听力SectionC
英语六级听力重在提炼信息
英语六级四十天突破讲义与笔记四
英语四级考试听力题解题要点
英语六级的视听训练
英语六级听力考试讲义与笔记一
英语六级考试听力备考时间表
英语六级强化班听力场景词汇精要
英语四六级听力最后两周冲刺之注重技巧提高
英语六级听力成功指南第二十八期
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |