6Augustus De Morgan. The Connexion of Number and Magnitude[M].Publishers to the University of London,.
7王文锦.大学中庸译注[M]北京:中华书局,2008.
8William Arthur Ward. BrainyQuote.com.Retrieved February 28,2014,from BrainyQuote.com.Web site[OL].http://www.brainyquote.com/quotes/quotes/w/williamart 103463.html,.
9Neville Bennett,Charles Desforges.Matching Classroom Tasks to Students’’Attainments[].chicago journals.