回答下列问题:
When leaders of Chinese mainland(大陆)and Taiwan met in Singapore for ________ first time since 1949, President Xi said, "Today will be remembered in _________ history."
下列属于清朝加强君权措施的是( )
①焚书坑儒
②罢黜百家,独尊儒术
③设立军机处
④大兴文字狱
⑤设立锦衣卫