人类经历了十大灾难，教会我们珍惜生命、保护环境与团结一致应对挑战。美女图片天天看

　　National Geographic assesses the contenders for the worst natural disasters of all time those events that had severe impact on human populations. As well as examining the deadliest, we will also explore the most powerful, the most wide reaching and epoch changing events. We explain how they occurred, why they created such mayhem and explain what makes them qualify as one of our... (展开全部)