题干就是选择题中的题设,只要认真观察、准确分析就可从题干的直接问句或不完全陈述句里找到选支中的唯一正确答案或最佳答案和几个似真的错误答案的方法. 一、直接法直接从题干的以概念、性质、方法立意的句型中找到解答,选出正确答案的方法. 例1 在平面直角坐标系中,已知两 The title is the title of the multiple-choice question. If you carefully observe and analyze it accurately, you can find the only correct answer or the best answer and several plausible wrong answers in the direct question or incomplete statement. The method. First, the direct method directly from the stem of the concept of the concept, nature, methods to find the solution to the sentence, select the correct answer. Example 1 In the plane rectangular coordinate system, known two