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直线与平面垂直的判定定理的证明,是现行高二数学(下)教材中的一个难点,其证明的过程,实质上就是由平面的轴对称转换为空间的镜面对称的过程。
The proof of the verdicts of straight line and plane perpendicularity is a difficult point in the current high school mathematics (secondary) textbooks. The process of the proof is essentially the process of converting the axisymmetrical plane into the mirror mirror symmetry of the space.