UniversityofAeronauticsandAstronautics,NanjingAudit University,NanjingMedicalUniversity,theUniversityofthe fiverepresentativetoindividualstudentsastheunitof analysis,commissionedbyschoolstudentsdepartmentstohelp completethesurveyarandomsampleofstudents,filland recyclingmethods,theactualstartofadescriptivesocial Research.whichsa...