摘要： 满足下列条件的三条线段a.b.c中一定不能组成三角形的是: ( ) A. a = m + 2, b = m + 3, c = m – 5 B. a = 2m + 1, b = 3m, c = 5m C. a = 2m, b = 3m, c = 5m + 1 D. a:b:c = 2:3:4

网址：http://m.1010jiajiao.com/timu_id_2076363[举报]