（二）裁决的事项不属于仲裁协议的范围或者仲裁机构无权仲裁；
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Is it possible for Blockchain to be hacked?Yes, blockchain can be theoretically hacked, but it is a complicated task to be achieved. A network of users constantly reviews it, which makes hacking the blockchain difficult.，详情可参考heLLoword翻译官方下载
int exchanged = 1; // 标记本轮是否发生交换