由于选择题事先给出一些结论 ,这一点类似于证明题 ,但又没有明显的结论 ,解答时就不一定用常规的直接求解法 ,而可以对条件和几个结论进行观察和分析 ,发现其特殊的数量关系和图表位置的特征 ,应用所学知识 ,作出正确的选择。方法一 :求解对照法从题目的条件出发 ,通过正确的 Since the multiple-choice questions give some conclusions in advance, this is similar to the proving question, but there is no obvious conclusion. When answering, it is not necessary to use the conventional direct solution method, but can observe and analyze the conditions and several conclusions, and find that The special quantitative relationship and the characteristics of the chart position, apply the knowledge learned, make the right choice. Method One: Solving the method of comparison starting from the conditions of the problem, through the correct