在数学解题中使用“依此类推”、“显然”或“可知”等语句,如果对问题的成功解决没有造成不利影响,既能说明问题,又简洁明快,当然用之不拒,何乐而不为!但是我们经常又看到另外的一幕:有些同学在答题中或者在某些参考书上,有时由于缺乏对问题的深入研究,对有 Using sentences such as “and so on,” “obvious,” or “knowledgeable” in mathematical problem solving, if it does not have a detrimental effect on the successful resolution of the problem, can explain the problem, but it is concise and clear. Of course, it is not rejected. Not! But we often see another scene: Some students in the answer or in some reference books, sometimes due to the lack of in-depth study of the issue,