理综考试中,经常遇到学生的试卷中出现大片的空白,甚至有的学生在规定的时间内只完成了二卷中两个学科的题目,另外一个学科不得分或者只得很少的分,大大影响了理综的总分。为什么我们的学生解题速度这么慢呢?笔者认为,主要有以下几个方面的原因:一、信息提取能力差如共点力平衡的条件及其应用在单纯的力学部分出现,学生处理起来得心应手,但是一旦在电场、磁场甚至是电与磁的复合场中出现,虽然试题的难度与力学中难度一致,但大多数的学生由于不能提取有效 Rational comprehensive examinations, students often encounter large gaps in the papers, and even some students within the prescribed time to complete the two volumes of two subjects in the subject, the other discipline can not be divided or only a few points, Greatly affected the total score of science and technology. Why do our students solve the problem so slow? I believe that the main reasons for the following aspects: First, poor ability to extract information as a total balance of conditions and its application in the simple mechanical part of the students handle it handy , But once in the electric field, magnetic field and even electric and magnetic composite field appears, although the difficulty of the test and mechanical difficulty, but most of the students can not extract effective