'公益课堂ID', 'Class_name' => '课堂名称', 'Video_name' => '视频名称', 'Class_type' => '科目', 'Class_page' => '章节', 'Class_detail' => '第几节课', 'Status' => '状态', 'Video_url' => '视频地址', 'Createtime' => '添加时间', 'Deletetime' => '删除时间' ];