A.≤2% B.≤3% C.≤6% D.≤10%
A.故障發(fā)生時(shí)間-故障恢復(fù)時(shí)間 B.故障恢復(fù)時(shí)間-故障發(fā)生時(shí)間 C.故障處理時(shí)間-故障恢復(fù)時(shí)間 D.故障處理時(shí)間-故障發(fā)生時(shí)間
A.≥90% B.95% C.≥98% D.100%