Ключевые слова: 3d, achievement, answer, award, blue, certificate, check, checklist, choice, computer, concept, contour, degree, diploma, document, education, exam, flat, form, grades, icon, illustration, internet, isolated, isometric, lecture, line, linear, list, mark, online, outline, paper, plus, program, questionnaire, quiz, school, set, speech, square, survey, teacher, tick, training, web, webinar,