【课程分析】本实验是在欧姆定律、电阻定律和伏安法测电阻的基础上进行的,是对这些知识的巩固和应用。本节课的重点是测量金属电阻率的原理;难点是数据的处理方法和误差分析。螺旋测微器的工作原理和读数方法是比较复杂的,为了分散难点,螺旋测微器有关知识的教学可以单独作为一节。 [Course Analysis] This experiment is based on Ohm’s law, resistance law and volt-ampere resistance measured on the basis of the consolidation and application of these knowledge. The focus of this lesson is to measure the principle of metal resistivity; the difficulty is the data processing methods and error analysis. Spiral micrometer working principle and reading method is more complex, in order to disperse the difficulties, spiral micrometer teaching related knowledge can be separately as a section.