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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】查理大帝
A.
a social class that a particular society considers its highest order
B.
a title of nobility
C.
king of the Franks from 768, king of the Lombards from 774, and emperor of the Romans from 800
D.
a way of structuring society around relationships derived from the holding of land in exchange for service or labour