A.白天 B.傍晚 C.話務(wù)負(fù)荷最低 D.忙時(shí)
A.話務(wù)統(tǒng)計(jì) B.告警數(shù)據(jù) C.性能數(shù)據(jù) D.路由數(shù)據(jù)
A.1 B.2 C.3 D.4