classes:  lecturer. Students are asked to be absent due to the activities of unions, associations, branches but teachers do not allow.  curriculum. Students are asked to be absent due to the activities of unions, associations, branches but teachers do not allow.  facility. Students are asked to be absent due to the activities of unions, associations, branches but teachers do not allow.  general. Students are asked to be absent due to the activities of unions, associations, branches but teachers do not allow.