单项选择题
A.rear =(rear +1)%m;B.rear =(rear -1)%m;C.front =(front +1)%m;D.front =(front -1)%m;
A.故障管理系统B.华为I2000C.华为M2000D.爱立信OSS
A.k =n /10%10B.k =n %10C.k =n /10D.k =(n -n /100*100)%10