什么是证明数学命题有真有假。在多数场合,命题的真实性不是显而易见的。在中学数学中,常常通过把命题直接或间接地同现实相对照,来判定其真假.对于比较简单的命题,可以把它们同现实直接对照。例如,“经过两点可以作一条直线,而且只可以作一条直线”,这是数学中的公理,是一个十分明显的几何事实,通过考察它的现实原型或几何图形,就能确认命题的真实性。 What is true or false proof of mathematical proposition. In most cases, the truth of the proposition is not obvious. In middle school mathematics, the authenticity is often judged by contrasting the proposition directly or indirectly with reality, and for simpler propositions, they can be directly compared with the reality. For example, “a straight line can be made after two points, and only a straight line can be made.” This is the axiom in mathematics. It is a very obvious geometric fact that can confirm the truth of the proposition by examining its real prototype or geometry Sex.