A.投訴率≦3‰ B.投訴率≦2‰ C.投訴率≦1‰ D.投訴率≦0‰
A.收費差錯率<3‰ B.收費差錯率<2‰ C.收費差錯率<1‰ D.收費差錯率=0
A.電費票據(jù)作廢率<5‰ B.電費票據(jù)作廢率<4‰ C.電費票據(jù)作廢率<3‰ D.電費票據(jù)作廢率<2‰