平静呼吸时正常肺下界位于锁骨中线
A．先天性发绀型心脏病B．心绞痛C．胆道蛔虫症D．急性腹膜炎E．一侧胸腔大量积液
参考答案：B
John has really got the job because he showed me the official letter _____ him it.[ ]
A. offered
B. offering
C. to offer
D. to be offered
血容量不足时，中心静脉压通常低于
A．5cmH2O
B．8cmH2O
C．10cmH2O
D．12cmH2O
E．14cmH2O
