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选择题是中考试题中必有的固定题型,它具有考查面宽、解法灵活、评分客观等特点.选择题一般由题干(题没)和选择支(选项)组成.如果题干不是完全陈述句,那么题干加上正确的选择支,就构成了一个真命题;而题干加上错误的选择支,构成的是假命题,错误的选择支也叫干扰支,常见的选择题的解法有直接法、排除法、特殊值法、作图法、验证法、定义法、综合法.1.直接法:
Multiple choice questions are the fixed questions in the middle school entrance examination questions, which have the characteristics of wide range of examination, flexible solution and objective score etc. The multiple choice questions usually consist of the title choice (question no) and the option choice (option) Statements, questions, and the correct choice of branches constitute a true proposition; and the problem stems with the wrong choice of branch, which constitutes a false proposition, the wrong branch of choice, also known as interference branch, common multiple choice solution There are direct method, excluding method, special value method, mapping method, verification method, definition method, comprehensive method .1. Direct method: