This is the setting of training courseware. The purpose is to hope that students can learn to browse in turn and not fast forward. You must read it before you can read the next page, and it will light up when you meet it. As long as he has enough study time, the system can complete the first lesson of this subject through the exam, and then he can take the exam. Repeated playback may be that the video time is too short and the outline requires a certain time, so he will repeat it and accumulate enough time to achieve the goal of this outline. I can't update. The next one may be a system card bug. You can't watch the theoretical training after one o'clock in the evening, because there is something wrong with this background, or it may be caused by recording a new time.