123 15 is a consumer complaint hotline and a nationwide internet platform. 1March 999 15 In order to effectively solve the problem of consumer complaints and accept consumer demands in a timely, convenient and fast manner, the State Administration for Industry and Commerce, with the strong support of the former Ministry of Information Industry, opened a nationwide unified consumer complaint reporting telephone.

Relying on the telephone number 123 15, the administrative departments for industry and commerce at all levels in China have set up a consumer complaint reporting service network with modern information technology as the main means, integrating acceptance, investigation and supervision, covering urban and rural areas throughout the country. After dialing 123 15, if you need to make a complaint or report, please answer the questions according to the staff's prompts, truthfully tell the facts, reasons and requirements of the complaint, and tell your name, address, telephone number or other contact information as well as the name, address and telephone number of the respondent.

Advantages and disadvantages of online courses

Benefits:

1, you can study repeatedly and replay the course at any time. If you don't understand in class, you can listen to the playback. The study time can be adjusted according to the individual situation, and the study content can be consolidated, which embodies the flexibility and humanization of online classroom.

2, save time, improve learning efficiency, save a lot of trivial time for school, eating and so on. You can also pause the play at will, unlike the situation that the tense learning rhythm can't keep up every day, which reduces the learning pressure.

Disadvantages:

1, depending on the network, network congestion often occurs, which cannot meet the expected requirements.

2. Due to the lack of interaction with teachers and students' common learning in the learning process, the course is boring, it is difficult to persist in learning for a long time, and it is easy to get tired.

3. The online class environment affects students' concentration in learning, and it can't reach the seriousness of the school at home.