开放性题型是指题目给定的条件不完备,或是解题方向不明确,或是解题方法不固定,无法直接使用某个公式或定理、原理求解,需要从多层面、多方位探索与题目有关的知识而获得解决的题型. The open question type refers to the incomplete conditions of the given topic, or the direction of the problem is not clear, or the method of solving the problem is not fixed, and cannot be solved directly by using a certain formula or theorem or principle. It needs to explore from multiple levels and multiple directions. The type of question that has been solved in relation to the topic.