【正确答案】 1、正确答案：Chinese history witnessed frequent floods, which were mainly caused by the monsoon climate and led to severe consequences. From B. C. 206 to 1949, a total of 1, 092 floods were recorded, that is to say, every two years our country has experienced one serious flood. The 21st Century has already gone through four severe floods. In 1931, the flood in the Changjiang River took away the lives of 420, 000 people. Similar floods occurred in the years of 1945, 1992 and 1998. The three floods submerged plots of farmland, washed away countless wealth, but caused fewer casualties.