简述单纯性二尖瓣狭窄的血流动力学改变及其影像表现。
胃肠燥热,津液不足,大便硬而小便数者,治宜选用() ["济川煎","增液汤","五仁丸","麻子仁丸","小承气汤"]
管理者根据下属所要达到的目标进行授权的方法称为()。 ["目标授权法","充分授权法","弹性授权法","制约授权法","引导授权法"]
黄龙汤与调胃承气汤二方组成中均含有的药物是() ["生地、玄参","生地、麦冬","人参、当归","人参、甘草","大黄、芒硝"]
三物备急丸的组成药物是() ["大黄、附子、细辛","大黄、干姜、细辛","大黄、芒硝、附子","附子、干姜、人参","大黄、干姜、巴豆"]
简述主动脉夹层的影像表现。