传热系数的物理意义是当冷热流体温差为1℃时，（）每平方米面积上所通过的热量。
A.1秒钟
B.一分钟
C.一刻钟
D.一小时
参考答案：D
气胸的并发症有（）
A.脓气胸
B.皮下气肿、纵隔气肿
C.血气胸
D.肺水肿
E.胸膜反应
A client with myocardial infarction and cardiogenic shock is placed in an intra-aortic balloon pump (IABP). If the device is functioning properly, the balloon inflates when the
A．triseupid valve is closed.
B．pulmonic valve is open.
C．aortic valve is closed.
D．mitral valve is closed.
