简介:Afteritbeingadvancedin1956,Academician,Prof.ChenGuo-Da’sTheoryofActivatedorgeodepression(Diwa)Tectonicshasbeenverifiedbyextensivepracticeandhaswithstoodthetestof39years.Ithasbeenthotlghthighlyofbothdomesticallyandabroad,andconsideredoneofthegreateventsinnaturalscientifichistory("Briefchronologicalta