15. There are 20 multiple-choice questions in the history postgraduate entrance examination, and the passing rate needs to be above 60%. Please check 15. The national unified entrance examination for graduate students (referred to as "postgraduate entrance examination" or "unified examination") refers to the general name of the relevant examinations organized by the education authorities and enrollment institutions for the selection of graduate students, and consists of the initial examination and re-examination organized by the national examination authorities and enrollment units.