二尖瓣关闭不全血流动力学障碍引起下列哪种改变（）
A.左心房扩大
B.左心房和右心室扩大
C.左心室扩大
D.左心房和左心室扩大
E.全心扩大
参考答案：D
中药材及中药制剂的质量指标包括鉴别、检查及含量测定等项。
2010版药典规定的中药材中黄曲霉毒素的测定方法是（）
A.高效液相色谱法
B.荧光分析法
C.薄层色谱法
D.紫外-可见分光光度法
E.微柱色谱法
F.免疫化学分析法
--- Excuse me. Could you tell me ___?
---Sorry. I have no idea, either.
A．what wrong is with him
B．What the matter is with him
C．what was the matter with him
D．what is the trouble with him
