科技类说明文在高考中已考十多年了,题型已趋于成熟,考查形式为单选题。这类题型的解答步骤,笔者在多年高三教学实践中总结归纳为“三步曲”,即:读全篇,理要点;看题干,明区间;辨选项,定答案。笔者认为这种由大到小、化整为零的解题方法简单易行,可操作性强。一、读全篇,理要点 Science and technology class exegesis has been examined in the college entrance examination for more than 10 years, the question type has become mature, the examination form is a single choice. The answer to this type of questions, the author in many years of high school teaching practice summarized in the “three steps”, that is: read the whole article, rationale points; see the stem, the interval; identify options, set the answer. The author believes that this method of solving the problems from big to small and disintegration is easy and feasible. One, read the whole article, the rationale