答案开放型问题，即ｏｐｅｎ－ｅｎｄｅｄ问题。在欧美各国多有研究，学生教材之中也有体现。然而，因为此类试题答案较多，评分标准难以掌握，中考、高考未有此类试题出现。所以，在我国研究很少，学生见到这类试题往往束手无策，笔者认为，做为一名中学数学教师，在实际教学 The open-ended question is the open-ended question. There are many studies in Europe and the United States, students are also reflected in the textbooks. However, because of the large number of answers to such questions, it is difficult to grasp the scoring criteria. No such questions have appeared in the entrance exams and college entrance examinations. Therefore, there is very little research in our country, and students often find it difficult to see such questions. The author believes that as a middle school math teacher, in practical teaching