鸡与鸡蛋，孰先孰后──ＲＮＡ作为催化剂及与磷化学的关系研究李艳梅，杨增家，赵玉芬（清华大学化学系北京１０００８４）引言鸡蛋，是鸡的产物，而鸡又诞生于鸡蛋之中；没有鸡蛋，鸡不能从天而降，而没有鸡，鸡蛋又从何而来？究竟是先有鸡还是先有鸡蛋呢？令人困惑的“... Chickens and eggs, whichever is more - RNA as a catalyst and its relationship with phosphorus chemistry Li Yanmei, Yang Zengjia, Zhao Yufen (Department of Chemistry, Tsinghua University, Beijing 100084) Introduction Egg is the product of chicken, No eggs, chicken can not fall from heaven, but no chicken, eggs and come from? Is there any chicken or egg first? confusing"...