动脉血氧分压是指()
A. lOOml血液中实际含有氧的毫升数
B. 溶解在动脉血液中氧分子所产生的张力
C. 血红蛋白和氧结合力的大小
D. 血红蛋白氧饱和度为50%时的氧分压
E. 血液中血红蛋白的氧饱和度
It is impolite for people to leave abruptly without saying anything especially for business partner
A. 对
B. 错
“So Long ”means "Long time no see"
A. 对
B. 错
It is proper to say "Happy landing" whenseeing people off at the railway station.
A. 对
B. 错