(1)我国最为常见的自然灾害是____________、_____________。 (2)形成淮河流域洪涝灾害的自然原因是 ①_____________________________________________________________________________________。 ②_____________________________________________________________________________________。 ③___________________________________________________________________________________等。 (3)简述治理淮河洪涝灾害的措施。 _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ |