In a sports team each player has a clear role, and there are few occasions_____ members are confused or uncertain of their roles. A.when B.where C.why D.how 答案:A登幽州台歌 (唐)陈子昂 前不见古人, 后不见来者, 念天地之悠悠, 独怆然而涕下。 15.这是一首吊古伤今,吟咏叹惋的生命悲歌。诗人通过书写 的感慨,抒发了 的思想感情。(2分) 16.“念天地之悠悠,独怆然而涕下。”两句诗营造了一种极其特殊的意境。请简要谈谈你对这两句诗的理解 (3分)