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- opera facial paintings of the Qing court
- opera feature film
- opera film
- Opera film director's technique course
- Opera Film theory
- opera frescoes at Peking Jingzhong Assosiation
- opera frescoes unearthed at Yuan tomb of XilizhuangVillage, Yuncheng City
- opera guild
- opera house
- opera house in Guangdong Guild Hall(Tian Jin)
- opera house in Lanzhou Baiyun Taoist Temple
- opera house in the City God Temple of New Jiangxian County
- opera imaginativeness
- Opera Improvement Bureau of the Ministry of Culture
- Opera Improvement Committee of the Ministry of Culture
- opera manuscripts and block-printed editions
- opera masks of the Qing court
- operameter
- opera monument of Foshan Xujiang North Emperor Temple
- opera murals of the Yanshan Temple in Fanzhi County
- opera music
- operand
- operant behavior
- operant conditioned reflex
- operant conditioning