There are four aspects to understand the curricular aim : ( 1 ) to acquire necessary knowledge and skill ; ( 2 ) to cultivate students ' space conception and geometrical intuition ; ( 3 ) to develop reasoning ability and experience axiom thinking ; ( 4 ) to develop students innovating vigor 可以从以下几个方面来认识空间与图形的课程目标： ( 1 )获得必需的知识与技能； ( 2 )培养空间观念与几何直觉； ( 3 )在探索图形性质的过程中发展合情推理能力，初步感受公理化思想； ( 4 )在解决实际问题的数学活动中培养学生的创新精神。
We introduce the notion of specific standard epistemic state and the notion of normal condition . based on the above two notions we make an initial step to answer the following question : what kind of contraction inference relations that may be represented by standard epistemic states can be characterized by existent types of postulates ( 2 )本文提出了特殊标准认知结构以及标准条件的概念，就可被现有的公设类型所公理化的由标准认知结构生成后承关系类的特征进行了初步的研究。
