【单选题】All the passengers were ______ of the flight which was put off because of heavy fog.
【单选题】若 MCS-51 单片机的机器周期是 2μs ,则其晶振频率为() MHz
【单选题】MCS-51 单片机的机器周期为2μs,则其晶振频率fosc为()MHz
【简答题】若MCS-51单片机接晶振为12MHz时,则它的机器周期为:( ) (A) 0.5μs (B) 2μs (C) 1μs (D) 1.5μs
【简答题】查找8位编码: 聚氯乙烯制手套( )劳保手套( )塑料或橡胶浸渍的运动手套( )
【单选题】MCS-51单片机的机器周期为1μs,则其晶振频率为( )MHz。