呼吸衰竭的血气诊断标准是
A. 动脉血氧含量低于9mmol/L
B. 动脉血氧饱和度低于90%
C. PH<7.35
D. 动脉血二氧化碳分压高于50mmHg
E. 动脉血氧分压低于60mmHg
海平面条件下,I型呼吸衰竭血气诊断标准一般为
A. PaO2<4.0kPa(30mmHg)
B. PaO2<5.3kPa(40mmHg)
C. PaO2<6.7kPa(50mmHg)
D. PaO2<8.0kPa(60mmHg)
E. PaO2<8.0kPa(60mmHg),PaCO2>6.7kPa(50mmHg)
海平面条件下,II型呼吸衰竭血气诊断标准一般为
A. PaO2<4.0kPa(30mmHg)
B. PaO2<6.7kPa(50mmHg)
C. PaO2<8.0kPa(60mmHg)
D. PaO2<8.0kPa(60mmHg),PaCO2>6.7kPa(50mmHg)
What were the two major forms of government in ancient Greece? Which two city-states had best represented the two forms of government respectively?