初中《生物》第一册（下）在讲到《哺乳纲》一章时，要求观察家兔的内部结构。在做这个演示实验时，学生往往对盲肠的结构注意不够，而且难于理解盲肠与其食性的关系。因此，可在课外科技活动时组织学生做豚鼠和小白鼠的对照解剖实验。豚鼠和小白鼠外形上差异不大，但食性却不 When the junior high school “Biology” booklet (bottom) talks about the “Mammalia” chapter, it requires observing the internal structure of the rabbit. In this demonstration experiment, students often pay insufficient attention to the structure of the cecum, and it is difficult to understand the relationship between the cecum and its diet. Therefore, students can organize controlled anatomy experiments of guinea pigs and mice during extracurricular science and technology activities. There is not much difference in the appearance of guinea pigs and mice, but the diet is not