诊断呼吸衰竭的血气标准是
A.PaO2<8.6kpa(65mmhg)和(或)伴有paco2>7.3kPa(55mmHg)
B.PaO2<6.7kpa(50mmhg)和(或)伴有paco2>8.0kPa(60mmHg)
C.PaO2<8.0kpa(60mmhg)和(或)伴有paco2>7.3kPa(55mmHg)
D.PaO2<8.0kpa(60mmhg)和(或)伴有paco2>6.7kPa(50mmHg)
E.PaCO2<8.6kpa(65mmhg)和(或)伴有paco2>6.7kPa(50mmHg)