摘要:<正> My thesis may be summed up as follows:In the region where the underground water moves in a vertical direction,the karst morphology ap-pears mainly to be the sunk morphotogy.When the region is dominated by the horizontal movement of theunderground water,the karst morphology appears to be rivers and plains,where the limestone plateau isdissected into rock mountains.The foot cave alwys appears at the foot of the rock mountains.