Urban formations at the national,regional and urban district levels in China are discussed.Observations at the national ......

目的研究团状雪灵芝的化学成分及其抑制TGF-β1活性。方法团状雪灵芝90%乙醇提取物采用D101大孔吸附树脂、硅胶、微孔树脂和C18反......