初中物理电路的计算一般只涉及两个电阻（用电器）的串联或并联，但有时也会有三个或三个以上的电阻出现，遇到这样的电路，同学们尽管掌握了串、并联电路的基本规律，但仍然看不懂电路的连接，给解答习题带来了一定的困难，怎么办？现提供“形难实易”的电路分析方法，供参考 The calculation of the junior high school physical circuit generally only involves the series or parallel connection of two resistors (using electrical appliances), but sometimes there are also three or more resistors. In the case of such circuits, the students have mastered the serial and parallel circuits. The basic law, but still can not understand the connection of the circuit, to bring some difficulties in solving the exercises, how to do? Now provides “hard and easy” circuit analysis method for reference