选择题是由题干和选项构成的一类习题.题干主要由直接问句或不完全陈述句构成,选项包括一个或几个正确答案和若干个干扰答案.此类题具有概念性强、知识覆盖面宽、迷惑性大、技巧性强灵活性高的特点.为了提高解题能力,必须在掌握化学基本知识和基本技能的前提下,了解其主要题型及其特点,学会一排除、二分析、三比较的解题方法,才能收到事半功倍的效果,下面简单介绍几种常见的解题方法.1.直选法(或记忆选择法)凭借学习时所记忆的知识和技能,对于考查有关物 A multiple choice question is a type of exercise consisting of a set of questions and a set of options that consists of a direct question or an incomplete statement that includes one or more correct answers and a number of disturbing answers. Wide coverage, confusing, strong technical flexibility and high.In order to improve the ability to solve problems, we must master the basic knowledge of chemistry and under the premise of the basic knowledge of its main types and characteristics, learn to exclude, two analysis , Three comparative problem-solving methods, to receive a multiplier effect, the following brief introduction to several common problem-solving methods.1 direct election method (or memory selection method) by virtue of learning the memory of knowledge and skills, for the examination of the relevant material