近年来,全国各省市中考试卷中,常出现凸透镜成像的试题.其中物像间距离的判定,学生出错较多.分析其原因,主要是解题依据不清楚.现就这类问题浅析如下. In recent years, examination questions of convex lens imaging have often appeared in examination papers of various provinces and cities across the country. The determination of the distance between objects has caused a large number of errors. The reason for this analysis is mainly because the basis for solving problems is not clear. .