目的 探讨丝裂霉素C(MMC)对提高人工鼻泪管植入术治疗慢性泪囊炎疗效的意义.方法 89例(98眼)慢性泪囊炎分为治疗组和对照组.对照组......

The ac impedance of Nb-doped semicon-ducting (Bao.72Pbo.28)TiO3 ceramics implanted with copper ions(200keV,6X1015 and 1X......