下述哪种征象可作为直接诊断主动脉瓣狭窄的依据() ["升主动脉中下段局限性扩张","左心室搏动增强","左心室肥厚","心影呈"主动脉型"","主动脉瓣区钙化"]
关于肥皂刷手法哪项正确() ["范围应从手指尖到肘上5cm","冲水时应将手指及肘均朝下","浸泡酒精范围应到肘上3cm","浸泡新洁尔灭后应擦干手臂","范围应从手指尖到肘上10cm"]
治疗湿热淋证,宜选用() ["石苇","大青叶","板蓝根","青黛","山豆根"]
症见发热,自汗出,渴喜温饮,少气懒言,体倦肢软,面色晄白,大便稀溏,脉洪而虚,舌质淡,苔薄白。治宜选用() ["桂枝汤","玉屏风散","四君子汤","参苓白术散","补中益气汤"]
利用基因工程技术培育能固氮的水稻新品种,其在环境保护上的重要意义是() ["减少氮肥使用量,降低生产成本","减少氮肥使用量,节约能源","改良土壤的群落结构","避免使用氮肥过多引起的水体富营养化"]
心包穿刺术。