A.>15-20cmH2O B.>5-12cmH2O C.>10-15cmH2O D.>4-12cmH2O
A.低于70mmHg B.低于75mmHg C.低于80mmHg D.低于85mmHg
A.72-82mmHg B.82-92mmHg C.72-102mmHg D.82-102mmHg