Afloodoccurs(发生)whenwateristoomuch.Thiscanhappeninmanyw...
问题详情：Afloodoccurs(发生)whenwateristoomuch.Thiscanhappeninmanyways.Mostcommoniswhenriversrunoutoftheirbanks.Toomuchrain,abrokendam,iceinthemountainschangingintowater,orevenanunfortunatelyplaceddamca...