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QueryHub has officially shut down, and its original domain (queryhub.info) has expired and been taken over by unrelated third-party sports betting content. The site is no longer safe or operational.
域名安全预警：原域名 queryhub.info 可能已过期停靠、出售或易主，为保护访问安全已屏蔽直接外链跳转。
AI 聊天机器人中目前正常运营的已核验工具，按近期访问量与编辑评分排序。
QueryHub originally launched as an AI-powered academic collaboration and study platform designed to help students and researchers solve complex problems together. It integrated intelligent search, conversational Q&A, and community-driven knowledge sharing to streamline collaborative learning.
Since QueryHub is defunct and its domain has been hijacked, check out the top AI study assistants and academic search engines on our homepage for working alternatives.
免费 / 开源学习资料库、AI 作业辅导与 24/7 导师服务，一站式整合
免费 / 开源欧洲学生学习中心：笔记、AI闪卡与AI问答
