不少成题,虽然曾一度使用过,但在教学上仍有许多重要功能.尤其在深化对知识的理解和训练思维的灵活性、敏捷性等方面有良好功效.其实,在中考和竞赛的试卷中也不时会看到成题的“身影”.本文精选几例成题并详加分析. Many questions, although once used, have many important functions in teaching. They are particularly effective in deepening the understanding of knowledge and the flexibility and agility of training thinking. In fact, in the examinations and competitions From time to time in the test paper will be seen as the title “ figure ”. This article selected a few cases and detailed analysis.