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
2017届浙江省高考英语一轮复习基础巩固:必修1 Unit 4《Earthquakes》
2017届浙江省高考英语一轮复习基础晨记:必修1 Unit 2《English around the world》
2017届浙江省高考英语一轮复习基础晨记:选修6 Unit 1《Art》
2017届高考英语一轮课时跟踪检测:(二十一)《Great scientists》(人教版必修5)
2017届浙江省高考英语一轮复习基础晨记:必修4 Unit 4《Body language》
2017届高考英语一轮课时跟踪检测:(二十六)《Art》(人教版选修6)
2017届浙江省高考英语一轮复习基础晨记:必修5 Unit 5《First aid》
2017届高考英语一轮课时跟踪检测:(三十九)《Pygmalion》(人教版选修8)
2017届浙江省高考英语一轮复习基础晨记:必修3 Unit 2《Healthy eating》
2017届浙江省高考英语一轮复习基础晨记:必修2 Unit 5《Music》
2017届浙江省高考英语一轮复习基础晨记:必修3 Unit 5《Canada—“The True North”》
2017届高考英语一轮课时跟踪检测:(二十五)《First aid》(人教版必修5)
2017届浙江省高考英语一轮复习基础晨记:必修4 Unit 1《Women of achievement》
2017届浙江省高考英语一轮复习基础晨记:必修5 Unit 2《The United Kingdom》
2017届高考英语一轮课时跟踪检测:(三十二)《Robots》(人教版选修7)
2017届高考英语一轮课时跟踪检测:(二十四)《Making the news》(人教版必修5)
2017届浙江省高考英语一轮复习基础晨记:必修3 Unit 4《Astronomy the science of the stars》
2017届浙江省高考英语一轮复习基础晨记:必修1 Unit 3《Travel journal》
2017届高考英语一轮课时跟踪检测:(三十三)《Under the sea》(人教版选修7)
2017届浙江省高考英语一轮复习基础晨记:必修5 Unit 4《Making the news》
2017届浙江省高考英语一轮复习基础晨记:必修4 Unit 5《Theme parks》
2017届浙江省高考英语一轮复习基础晨记:选修6 Unit 3《A healthy life》
2017届浙江省高考英语一轮复习基础晨记:必修4 Unit 3《A taste of English humour》
2017届高考英语一轮课时跟踪检测:(三十七)《Cloning》(人教版选修8)
2017届浙江省高考英语一轮复习基础晨记:必修3 Unit 3《The Million Pound Bank Note》
2017届高考英语一轮课时跟踪检测:(三十四)《Sharing》(人教版选修7)
2017届高考英语一轮课时跟踪检测:(二十七)《Poems》(人教版选修6)
2017届浙江省高考英语一轮复习基础巩固:选修7 Unit 3《Under the sea》
2017届浙江省高考英语一轮复习基础晨记:必修2 Unit 1《Cultural relics》
2017届高考英语一轮课时跟踪检测:(四十)《Meeting your ancestors》(人教版选修8)
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |