参苏饮与败毒散二方组成中均不含有的药物是()
A.柴胡、前胡
B.羌活、苏叶
C.茯苓、半夏
D.黄连、黄柏
E.人参、甘草
参考答案:D
A sample of size n=25 is selected from a normal population. This sample has a mean of 15 and a sample variance of 4. What is the standard error of the sample mean()
A. 2.0.
B. 0.4.
C. 0.8.
出血坏死型胰腺炎时的Cullen征是指()
A.脐周皮肤红斑
B.脐周皮肤青紫
C.胁腹皮肤青紫
D.脐周皮肤呈灰紫斑色
E.胁腹皮肤呈灰紫斑色