急性出血坏死性胰腺炎最常见的并发症是（）
A.ARDS
B.休克
C.急性肾衰竭
D.胰腺周围脓肿
E.胰腺假性囊肿
参考答案：B
An analyst does research about investment risk. Which of the following statements best describes systematic risk（）
A. Total risk.
B. Diversifiable risk.
C. Variability in all risky assets caused by macroeconomic variability.
咸味具有的作用是（）
A.止咳
B.温中
C.软坚
D.止泻
E.清热
