1. The student ' s life span: the period of suspension is limited (from 27 February to 3 March 112).

2. Appropriate course: limited number of people and completed course. The program does not include the import of the opening unit, the ability to split classes.

3. Licensing restrictions:

(1) The authorization code shall not be transferred by the students themselves, the authorization code shall be designed to provide for the retention of teachers and the "access to the Internet" column, and the teacher shall be required to remove the students who have been authorized and elected.

(2) Each authorization number is available only once and the maximum number of land-bound persons will be automatically adjusted to +1.

(3) The course is added by a code, after which the student cannot be removed from the list.

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