老师:同学们好!今天我们来了解一些中草药的知识。我们都知道,中医是诊断和治疗疾病、维护人类健康的医学体系。中医有很多种治疗手段,比如针灸、推拿等。中草药也是一种重要的治疗手段。现在我想问大家一个问题,中医里有多少种中草药呢? Teacher: Students are good! Today we come to understand some of the Chinese herbal medicine knowledge. We all know that Chinese medicine is a medical system for diagnosing and treating diseases and safeguarding human health. There are many treatments for traditional Chinese medicine, such as acupuncture and massage. Chinese herbal medicine is also an important treatment. Now I would like to ask you a question. How many Chinese herbal medicines are there in Chinese medicine?