Ключевые слова: arm, blank, book, browsing, classic, closeup, college, content, culture, document, education, figures, finding, finger, geometry, hand, holding, index, information, interest, knowledge, learn, lecture, library, note, notebook, notepad, open, page, pages, paper, pencil, pointing, points, read, reading, research, school, science, sheet, sketch, spread, study, table, teacher, text, textbook, university, white,