呼吸衰竭的动脉血诊断指标是

A．PaO<SUB>2</SUB>＜9.33kPa(70mmH，PaCO<SUB>2</SUB>＞5.33kPa (40mmH
B．PaO<SUB>2</SUB>＜7.33kPa(55mmH，PaCO<SUB>2</SUB>＞7.33kPa (55mmH
C．PaO<SUB>2</SUB>＜8kPa(60mmH，PaCO<SUB>2</SUB>＞6.67kPa (50mmH
D．PaO<SUB>2</SUB>＜6.67kPa(50mmH，PaCO<SUB>2</SUB>＞8.0kPa (60mmH