中国自20世纪60年代开始进行海洋油气资源的自营勘探和开发。()
A.Sincethe1960s,Chinabegantoexploreandexploitoffshoreoilandgasresourcesonitsown B.Beginningfromthe1960s,Chinabegantoexploreandexploitoffshoreoilandgasresourcesonitsown C.Asearlyasthe1960s,Chinabegantoexploreandexploitoffshoreoilandgasresourcesonitsown D.Untilthe1960s,Chinabegantoexploreandexploitoffshoreoilandgasresourcesonitsown