随着新课程改革的不断深化,立体几何无疑又成为数学学科高考命题改革的“突破口”与“试验田”,有时还成为“风向标”,这些改革尝试的目的在于“激发学生独立思考,从数学的角度去发现和提出问题,并加以探索和研究,这有利于提高学生的思维能力和创新意识”.从近几年来,特别是200 With the continuous deepening of the new curriculum reform, the three-dimensional geometry has undoubtedly become the “breaching point” and “experimental field” of the mathematics subject entrance examination reform, and has sometimes become a “wind vane”. These reform attempts are aimed at “inspiring students to think independently, from the perspective of mathematics. From the perspective of discovering and asking questions, and exploring and researching them, this will help improve the students’ thinking ability and sense of innovation.” In recent years, especially 200