(1)“秦皇汉武”分别指的是哪一历史人物?____________________________________________________________________________________________(2)秦皇、汉武在思想统治方面分别采取的措施是什么?____________________________________________________________________________________________(3)材料二反映了汉初社会的哪一问题?汉武帝采取了哪一措施解决这个问题?这一措施是谁建议的?____________________________________________________________________________________________(4)据材料三两幅图片所示,秦朝为巩固统一采取的两项重要措施是什么?____________________________________________________________________________________________