以下不属于反射性呕吐的病因的是（）
A.幽门梗阻
B.胆石症
C.急性肾炎
D.尿毒症
E.急性心肌梗死
参考答案：D
26．The chemical weapons by the Japanese troops are the chief cause of the constant poisoning accidents.
A．Were abandoned
B．abandoned
C．had abandoned
D．abandoning
下述哪种征象可作为直接诊断主动脉瓣狭窄的依据（）
A.升主动脉中下段局限性扩张
B.左心室搏动增强
C.左心室肥厚
D.心影呈"主动脉型"
E.主动脉瓣区钙化
