Afloodoccurs(發生)whenwateristoomuch.Thiscanhappeninmanyw...
問題詳情：Afloodoccurs(發生)whenwateristoomuch.Thiscanhappeninmanyways.Mostcommoniswhenriversrunoutoftheirbanks.Toomuchrain,abrokendam,iceinthemountainschangingintowater,orevenanunfortunatelyplaceddamca...