1.对常见动物的实验材料要尽可能的充分利用。常见动物实验材料,大多为一些鲜活的生命,其中不乏有益动物,如青蛙、蟾蜍、蜻蜓等,我们要珍惜节约使用这些“实验材料”。拿中学常用实验材料青蛙来说,我们在使用其做实验材料时,要对实验内容精心设计,如每个实验小组利用一只青蛙,可做七个实验:一是上皮细胞观察实验;二是“关节、肌肉和骨的关系”实验;三是“坐骨神经——腓肠肌”实验;四是“小脑控制身体平衡实验”(小脑切除不净仍能翻转身体);五是幼蛙激素实验;六 1. The common animal experimental materials to make full use of as much as possible. Common animal experimental materials, mostly for some fresh life, many of which are useful animals such as frogs, toads, dragonflies, etc., we should cherish the economical use of these “experimental materials ”. Take the middle school commonly used experimental material frogs, we use the experimental materials, we should elaborate on the experimental content, such as each experimental group using a frog, you can do seven experiments: First, epithelial cell observation experiment; second Third, “sciatic nerve - gastrocnemius” experiment; Fourth, “Cerebellar control of body balance experiment” (cerebellar resection is not net can still flip the body); five are young Frog hormones experiment; VI