Analysis of test questions: Chinese medicine is an ancient science and technology in China, with the characteristics of paying attention to practical application, practicality and integrity. After thousands of years of development, Chinese medicine has formed a unique theoretical system and rich methods of health preservation and diagnosis and treatment, which has a great influence on future generations. It shows that Chinese culture comes down in one continuous line and has a long history. China culture is unique in the field of world culture. Therefore, item C is chosen in this question, and item 3 is correct in itself but does not meet the meaning of the question.

Comments: This is a multiple-choice question with "this" in it. This kind of questions is often examined in the college entrance examination, which needs attention. The key to solving the problem is to find out the "reference" of "this" in the material, otherwise it is very likely to be wrong. This question is moderately difficult.