Flood disaster is caused by floodwater, but floodwater is not equal to flood disaster.The form of flood disaster is an outer dynamic geological process.

 
  • 洪災是由洪水引發(fā)的,但洪水并不等于洪災,由暴雨發(fā)展為洪水、洪災是一種外動(dòng)力地質(zhì)作用過(guò)程。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan