The special value method is to introduce an easy-to-know value to get the answer when the subject conditions permit. Substitution verification method is to substitute the obtained results into the topic conditions to verify whether it is established. Image method is to draw an image according to the conditions of the topic, so that the topic becomes clear, and some problems can be directly drawn according to the image. Exclusion method I mostly use multiple-choice questions to substitute the options into the questions and exclude the wrong options one by one. Depending on the options, some intermediate values can be used to eliminate them faster. Logical analysis seems to be what my teacher said, that is, you do what you say-and then deduce what questions you want to ask. If you do too much, the questions are the same. For example, the coordinates of the center of gravity are all triangles, and the coordinates of the three points will be added and divided by three, which will be packaged to some extent. However, as long as you know what the midline will be, it will remain the same. I don't know if I can help you, because I didn't see your question because of the examiner's question in the college entrance examination. It's been a long time, and everything is a vague memory. But, it's useless. What matters is the mentality. I wish you a happy study!