After receiving the news, immediate ______ was taken by the local government to stop the disease spreading.
①入鲍鱼之肆,久而不闻其臭;入芝兰之室,久而不闻其香。
②少小离家老大回,乡音未改鬓毛衰。
③粗缯大布裹生涯,腹有诗书气自华。
④好雨知时节,当春乃发生,随风潜入夜,润物细无声。
读“巴西地图”,完成下列问题:
请探究两个等腰三角形相似的条件,用文字语言直接写出探究的结果即可.