【单选题】I’m examining the composition he finished ______ the possible mistakes init.
【简答题】若MCS-51单片机采用12MHz的晶振,它的机器周期(),ALE引脚输出正脉冲频率为()。
【单选题】下列协议中,不属于内部网关协议的是( )。
【单选题】I ’ m examining the composition he has just finished ______ the possible mistakes in it.
【单选题】I'm examining the composition he was finished___the possible mistakes in it.
【简答题】若MCS-51 单片机采用12MHz 的晶振,它的机器周期( ) μm ,ALE 引脚输出正脉冲频率为( ) MHz 。