绝对值是重要的数学概念,它可与数、式、方程、集合、函数、数列、不等式发生联系,在高考题中,常以选择题、填空题的面目出现,但在’93却以压轴题出现,一下子引起普遍重视,时隔两年在’96的高考压轴题(理工农医类)中,再次出现.这是两道思考性强的难题,对分析能力有较高要求.为了总结经验,提高应试能 Absolute value is an important mathematical concept. It can be related to numbers, equations, equations, sets, functions, series, and inequalities. In college entrance examination questions, it often appears as a multiple-choice and blank-filling question, but in the ’93 it is the final axis. The question appeared, which caused general attention all of a sudden. Two years later in the ’96 college entrance examination title problem (kind of polytechnic agronomy), it appeared again. This is a two-thinking problem and has a high demand for analytical skills. Summarize experience and improve test performance