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元素及化合物的框图题考查学生综合分析能力和逻辑推理能力,解答此类题目一般有四步:读题审题,分析突破,假设推进,验证解答。其中分析突破是在读题审题的基础上,认真分析已有结论与求解问题之间的关系,通过分析、推理、综合寻找解题的突破口,这是解框图题的关键。下面结合例题谈谈寻找突破口的途径。
The elemental and compound block diagram questions examine the student’s comprehensive analytical and logical reasoning skills. There are generally four steps to answering such questions: question review, analysis breakthrough, hypothesis advancement, and validation. The analysis breakthrough is based on the question-reading questions, and carefully analyzes the relationship between the existing conclusions and the problem solving. Through analyzing, reasoning, and comprehensively finding the breakthrough point for solving problems, this is the key to solving the block diagram questions. The following examples will talk about ways to find a breakthrough.