Which nursing diagnosis would be the most appropriate for a client with coronary artery disease (CAD)

A. Ineffective thermoregulation.
B. Impaired gas exchange.
C. Risk for injury.
D. Decreased cardiac output.

以下方法能够调节离心泵流量的有（）。

A.出口阀调节

B.旁路调节

C.转速调节

D.切割叶轮