题目内容

下列关于“分布式总线仲裁”的说法中，错误的是()。

A. 每一个潜在的主设备拥有一个私有的仲裁逻辑电路
B. 自举分布仲裁和并行竞争分布仲裁的优先级是固定的
C. 并行竞争分布仲裁中，若仲裁号大于仲裁总线上的仲裁号，则总线请求成功
D. 并行竞争分布仲裁中，若仲裁号小于仲裁总线上的仲裁号，则撤销请求

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