H?i ??ng x? s? ki?n thi?t mi?n B?c bao g?m 28 ??n v? thành viên, trong ?ó có 6 ??n v? t? ch?c quay s? chính th?c và c? ??nh hàng tu?n c? th? nh? sau:(a) They can be done at frequent and uniform times for the duration of college several hours, or from time to time established by school authorities;123B is usually a trustworthy and protected o