463

听力第113套 （mk 039）L1

雅思阅读第281套Passage1：The Impact of Wilderness Tourism

434

027Costs and Benefits of Social Life讲解

037Early Modern Industrialization讲解

雅思阅读第101套Passage3-The Immunisation Controversy

013Aquatic Desert Animals讲解

129The Origins of Plant and Animal Domestication讲解

雅思阅读第105套Passage2-Looking for Life on the Ocean Wave