一、导引问题 Network Education College of SJTU Network Education College of SJTU Network Education College of SJTU ■1、美国比中国的贫困人口多？ ■2、老年夫妻缘何离婚同居"？ 3Network Education College of SJTU Network Education College of SJTU Network Education College of SJTU 3 一 、导引问题 n 1、美国比中国的贫困人口多？ n 2、老年夫妻缘何“离婚同居”？