世界上对人类危害最大的自然灾害是什么?是地震?是洪水?是火山爆发?这些都不是,而是来去匆匆的龙卷风。据联合国统计:从1947—1970年,龙卷风夺走了地球上74.5万人的生命,而丧生于水灾的是17.3万人;地震为15.1万人;火山爆发仅0.72万人。据不完全统计,全世界每年平均发生1000多个龙卷风其中美国出现最多,平均每年有500～600个。全球最大的龙卷风就出现在美国。1925年3月18日,美国出现一股罕见 What is the most devastating natural disaster in the world? Is Earthquake? Flood? Volcano? These are not but tornado tornadoes. According to the UN statistics, from 1947 to 1970, the tornado claimed the lives of 745,000 people on earth, while those killed in floods were 173,000; the earthquake was 151,000; and the volcanic eruption was only 7,200. According to incomplete statistics, an average of more than 1,000 tornadoes occur each year in the world, of which the United States has the largest number, with an average of 500 to 600 per year. The world’s largest tornado appeared in the United States. March 18, 1925, the United States appeared a rare