In this paper, the choosability of outerplanar graphs, 1-tree and strong 1-outerplanargraphs have been described complet......

数形图作为思维导图的图式之一,它有助于促进学生逻辑思维能力的发展,培养和提高学生的能力,潜移默化中掌握数学的分类思想.本文以......