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2002年高考数学试题的理科第18题与文科第19题,是两道针对旧教材的立体几何问题,本文利用新教材空间向量知识,分别给出它们的一种简捷解
The mathematics question 18 and the 19th question of the liberal arts college entrance examination questions in 2002 are two-dimensional geometry problems for old textbooks. This article uses the space vector knowledge of the new textbooks and gives a brief explanation of them.