51单片机的at89c51 的资料信息，可以进一步了解其用法-AT89C51 MCU 51 of the information, you can learn more about its usage

Multisim学习资料，电路仿真分析的好教程-Multisim good tutorial for learning materials, circuit simulation analysis

Multisim软件学习ppt，非常具有实际操作价值。-Multisim software learning ppt, very practical value.

利用multisim编写的交通灯程序，里面包括PPT和老师的讲解，是北航电子信息工程教授的实验课答案，非常珍贵。-Use multisim write traffic lights program, which includes PPT and teachers to explain, is the electronic information engineering professor Northern experimental class answer, very precious.