问答题 假设AX=4DE5H,指令AND AX,00FFH执行后，AX=  ?

单项选择题 5. Getting a DNT signal does not ______ anyone to stop tracking, although some companies have promised to do so.             A、A. obsess    B、 B. oblige     C、 C. obey  D、  D. observe

问答题 如电路图所示，试应用叠加原理，求电路中的电流I1、I2及I3。