/coursedata/sharedResource?key=0LOmAZK0hqfvzMS0BOJEXig112pWGH3gVt4z7eZkBc0%3D
/coursedata/sharedResource?key=0LOmAZK0hqfvzMS0BOJEXig112pWGH3gVt4z7eZkBc0%3D
coursedata/sharedResource?key=McNtVjKK/NgzW7Njud1G%2BKOoSAm6W1pg3A%2BOK7ajgik%3D A: 已观看。明白 B: 不明白
coursedata/sharedResource?key=McNtVjKK/NgzW7Njud1G%2BKOoSAm6W1pg3A%2BOK7ajgik%3D A: 已观看。明白 B: 不明白
1