Ключевые слова: agree, answer, approve, assessment, black, blackboard, chalk, chalkboard, check, checkbox, checklist, choose, clipboard, collection, concept, contour, data, design, disagree, document, doodle, drawing, evaluate, exam, examination, hand drawn, icon, illustration, info, isolated, linear, list, multiple, option, paper, poll, questionnaire, research, right, select, survey, symbol, test, tick, vote, web, white, written, wrong,