什么叫摩擦传动？
意见领袖
试论中世纪大学产生的原因及其意义。
按照层级原理，学校领导系统可以分为决策层、管理层和执行层。
A general difference between phonetics and phonology is that phonetics is focused on the production of speech sounds while phonology is more concerned with how speech sounds distinguish meaning.
幼儿教师是幼儿园中全面负责（）的人员
