契丹族在中国历史上消失是在：（） A南宋 B元朝�

契丹族在中国历史上消失是在：（　　）

A南宋 B元朝 C明朝 D清朝

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契丹族在中国历史上消失是在：（ ） A南宋 B元朝�

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契丹族在中国历史上消失是在：（） A南宋 B元朝�