02年中考物理中,不少省市的“压轴”题,出现了温度调控电路,它们有一定的难度.要求具有扎实的基础知识和较强的分析能力。这里分析一例. In the middle school entrance examination physics in 2002, a number of provinces and cities were entitled to “end-point” questions. Temperature regulation circuits appeared, and they had certain difficulties. They required solid basic knowledge and strong analytical skills. Here is an example analysis.