题目

Tom often (犯错误), so his teacher doesn't like him. 答案：【1】makes mistakes它使“由众多血缘部族邦国形成的联盟制转变为由众多地域国家形成的相对一统天下，向真正意义上的统一的地域国家迈进了一大步”。“它”是指A．分封制B．宗法制C．郡县制D．中央集权制