（一）伪造、变造或者买卖国家机关、人民团体、企业、事业单位或者其他组织的公文、证件、证明文件、印章的；
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See SECURITY.md for the full threat model, known issues, and mitigations.。业内人士推荐Line官方版本下载作为进阶阅读
In 2019, 2020 and 2021 the sea ice was relatively stable and significant feather mounds were visible.。服务器推荐是该领域的重要参考
2. 排序：将堆顶(最大值)与末尾交换，堆大小-1，重新调整堆