【简答题】ISDN为用户提供了两类速率接口:一类为【 】;另一类为【 】。
【简答题】B-ISDN 为 综合业务数字网, N-ISDN 为 综合业务数字网。
【判断题】Harry—a young man in his twenties Tim— Harry’s friend Nancy Truman — Tim’s grandma, very old Tim is introducing his grandma to his friend Harry. Harry greets the old lady. Tim: Harry, this is my grand...
【单选题】在STEP7的S/R指令中,对于S指令,以下说法正确的是?
【单选题】以下关于指令寻址的描述中正确的是( )。
C.
包含了下条指令地址码的指令,下条指令一定会转移到该地址上去
D.
顺序寻址方式下,每执行一条指令,PC的绝对值不一定加1
【单选题】以下关于指令系统的叙述中,正确的是
A.
用于解决某一个问题的一个指令序列称为指令系统
【单选题】One day, Gina is told that she cannot visit her Grandma Lilly because______.
A.
Grandma is busy preparing for cooking more cookies
B.
Gina cannot make Grandma feel better
C.
Gina needs more sleep and rest
D.
Grandma is not very well and is in hospital
【单选题】The party attempted to assemble its aims into a focussed political _________.
【简答题】ISDN为用户提供了两类速率接口,一类为______,另一类为主速率接口。
【单选题】锋面气旋具有的特征是:I.南半球逆时针旋转;II.主要发生在温带;III.气旋与锋面结合;IV.北半球逆时针旋转;V.平均范围500Km;VI.发生在任意纬度带。