Test analysis: there are both essence and dross in traditional culture, so the second item is incorrectly stated and cannot be selected; Social practice is the source of cultural innovation, so the fourth mistake cannot be chosen; The material in the title "Tongling No.1 Middle School offered Chinese, Chinese folk music, martial arts, calligraphy, paper cutting, China chess and other courses to students in Schiller Middle School in marbach, Germany, which was welcomed by German teachers and students and aroused their strong interest in China culture", reflecting ① and ③. So, the answer is D.