《学习目标》 1. grasp the important words and phrases in the two units and improve your ability to express yourself in english. 2. learn the method of constructing knowledge trees through self-study and cooperative exploration. 3. enjoy the beauty of english with a strong passion. 《知识体系构建》 1. 倍数的三种表达形式：南京是那个城市的3倍大。 (1)__ ___________________________________________________________
