二、学法指导 重点:认识几类动物及它们的一些生活习性。难点:区分不同类动物。 (一)掌握共同特征,形成类群概念 自然界的动物种类、数量繁多庞杂,把动物分类,有利于我们更好的认识它们。 分类要按一定的标准进行,人们常用的分类标准,就是根据共同特征对动物进行分类。如哺乳动物的共同特征是“长毛,生小动物,小动物吃妈妈的奶。”人们根据这一共同特征,把所有符合这一共同 Second, the focus of learning law: understanding of some types of animals and some of their habits. Difficulties: distinguish between different types of animals. (A) to grasp the common characteristics, the concept of the formation of taxa Nature groups of animals, a large number of complex, animal classification, help us better understand them. Classification according to a certain standard, commonly used classification criteria, is based on common characteristics of animals classified. Common features of mammals, for example, are “hairy, live animals, and small animals eating mothers' milk.” According to this common feature, people conform to this common