4. How does an early-warning system help us maintain the ecological balance? A.By signaling the urgent need for taking preventive action. B.By stopping us from killing large predators. C.By bringing the broken-down ecosystems back to normal. ...
Work with a partner and do the two tasks. Ask and answer questions about three people according to the table. Where is Mike Harris from his farm? Where does he live? He lives in what company does he work for he works for what does he do his. First you play the role of li yang f...
Dujiangyan, located on the Minjiang River in the west of Chengdu Plain, about 50km away from Chengdu City, was built in the third century BC. Its uniqueness is that it does not need dikes to regulate water flow. For more than 2000 years, it has been playing an effective role in flood...
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A driver might be found to have a level of 0.15, for example, while the legal limit is 0.08. To comprehend how we can gain access to such precise numbers, we have to ask ourselves: how does a breathalyzer work? What do those figures mean? And how do police officers find out if ...
Drainage is an integral part of any development Drainage refers to the route taken by water from the place where it falls as rain or snow to reach a river, lake,or ocean. This drainage system consists of channels and sewers and includes canals, ditches, and even natural contours like hills...
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A A good reader is like a driver. He must change his reading speed (速度) to fit what he is reading and what he is reading for, just as a driver does to fit the road condition (状况). A good reader may be able to read a thousand words per minute (WPM)(词/每分钟) but he wo...