第15题: [单项选择]能增加左心室后负荷的临床情况是() A. 室间隔缺损 B. 高血压 C. 二尖瓣反流 D. 主动脉瓣反流 E. 房间隔缺损 参考答案:B 答案解析:对左心室来说,在无主动脉瓣狭窄或主动脉瓣缩窄时,其后负荷主要取决于:①主动脉的顺应性:即主动脉内容量随压力升高管壁扩张的能力,如血管壁增厚,则顺应性降低。②外周血管阻力:它取决于小动脉血管床的横断面积
第25题: [单项选择]Why did the woman suggest not giving everyone an extra day off so quickly( ). A. There will still be much work. B. They don’t deserve it. C. A new project could appear. D. The financial analysis project can’t wait. 参考答案:C