说明：  介绍了C51基于μVision2编程环境下的基本操作，并结合试验仪电路，引入若干实验，是C51单片机初学者的入门助手
(C51 introduced μVision2 programming environment based on the basic operation, combined with the circuit tester, the introduction of a number of experiments, a C51 microcontroller assistant beginners)