Dave Green is a 12-year-old boy. He lives in Shanghai with his grandparents, parents and sister Cindy. Dave likes blue best.Look,his jacket and backpack are blue.He is in Class 3.22 boys and 18 girls are in his class.His good friends Liu Kun and Li Jie are in Class 3,too.Miss Wang is their science teacher.She is a good teacher. Her classes are fun. They all like her a lot. Science is not difficult for them! Dave likes playing computer games,but he doesn't play them every day. He studies science every day.

发源于西欧的启蒙运动能迅速波及欧洲大多数国家的主要原因是