20 0 1年高考题 (9,1 7,1 9)用向量知识求解不仅简洁明了 ,而且具有一般性 .正如教材引言所指出 :向量是数学中的重要概念之一 ,它广泛应用于生产实践和科学研究中 .向量在立体几何和解析几何中的应用更为直接 ,用向量方法特别便于研究直线、平面和空间里有关长度、角度、平行 The 20,01 college entrance examination question (9, 1, 7, 9) is not only concise and straightforward, but also has generality. It is pointed out in the textbook introduction that vector is one of the important concepts in mathematics and it is widely used in production practice. In scientific research, the application of vectors in three-dimensional geometry and analytic geometry is more straightforward, and the vector method is particularly convenient for the study of length, angle, and parallelism in lines, planes, and spaces.