当轴位移增大时,应先(),使之回到正常值。
A.加负荷
B.减负荷
C.提高参数
D.降低参数
参考答案:B
男,41岁。活动后心悸、气短3年,6天前受凉后出现咳嗽、咳白痰。有风湿性心脏病二尖瓣狭窄史。查体:高枕卧位,BP90/60mmHg,双肺底可闻及较密集的细湿啰音。心率140次/分,心律不齐,S1强弱不等。治疗首选()
A.西地兰
B.青霉素
C.硝普钠
D.美托洛尔
E.多巴酚丁胺
—I'm going to study engineering in Tsinghua University tomorrow. —().
A.All the best in your study
B.All the best with your study
C.All the best in your business
D.All the best in your new job