高考试题凝聚了命题专家的集体智慧,具有权威性、示范性、借鉴性,尤其是压轴题的设计力求情境熟悉,知识综合,方法灵活.研究高考试题能促进教学,推动学生应用知识,在发散思维的过程中,有时也会发现意想不到的结论.本文对2017年全国卷Ⅲ理科第12题进行了深入的研究,在此与读者分享.1.高考真题,情景再现 The college entrance examination examinations unite the collective wisdom of propositional experts, which are authoritative, exemplary, reference, especially the design of the finale, and strive to be familiar with the situation, knowledge synthesis, flexible method.Research exam questions can promote teaching, promote students to apply knowledge, divergent Thinking process, sometimes unexpected findings will be found.This article on the National Volume III in 2017 the 12th issue conducted in-depth research, share with readers .1 college entrance examination Zhenti, scene reproduction