【正确答案】Textual function refers to the fact that language has mechanisms to make any stretch of spoken or written discourse into a coherent and unified text and make a living passage different from a random list of sentences．

【答案解析】[解析] 本题考查语篇功能的概念。语篇功能是指语言中存在着一种机制将口头或书面的话语组织成连贯统一的语篇，这种机制使实际的言语区别于一系列随意的句子。