应需性是应需之文的基本特点。应需之文源于生活 ,或应实际生活之需不可不为 ,如听课和读书笔记、各科作业、计划、总结、条据、交谈、发言和演讲等等 ;或应内心情兴之需不吐不快 ,如日记、书信、随笔和谈心等。总之 ,完全出自“必要说和喜欢说” ,有特定的场合、明确的对象和 Dependency is the basic characteristic of the article which is needed. Articles should be derived from life, or should be based on the actual needs of life, such as listening and reading notes, subjects, planning, summary, conditions, conversations, speeches and speeches, etc .; Do not spit it off, such as diaries, letters, essays and talks. In short, completely from the “necessary to say and like to say,” there are specific occasions, clear targets and