1、使用T0或T1，完成基准为50ms的定时，使用查询方式完成即可；

2、利用50ms的基准定时，完成1s定时，每1秒，切换EZ-51开发板上某个LED（如LED0）的亮灭状态；

3、每10秒，控制EZ-51开发板上的蜂鸣器鸣叫1次；

4、分别用汇编和C51完成上述要求。-1, using the T0 or T1, the timing of completion basis of 50ms, can be accomplished using the query　2, using 50ms reference timing, timing of completion of 1s every 1 second to switch EZ-51 development board an LED (eg LED0 ) light off state　3, every 10 seconds, the control EZ-51 development board buzzer 1　4, respectively, with C51 compilation and completion of the above requirements.