OpenHarmony documentation | OpenHarmony开发者文档
本系统为在线答题系统（在线考试，问卷调查，在线练题），支持在线考试、在线练习等功能... 支持题型：单选题、多选题、填空题、问答题、判断题、附件题、材料题、视频题、音频题支持答题类型：手工配置 试卷答题、随机抽题练习社交功能：试题收藏、试题评论、试题解析、试题点赞权限控制：题库权限、考场权限
PDF补丁丁——PDF工具箱，可以编辑书签、剪裁旋转页面、解除限制、提取或合并文档，探查文档结构，提取图片、转成图片等等
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