下列缩瞳药物中,哪种为胆碱受体激动药物() ["毒扁豆碱","匹罗卡品","新斯的明","以上均是","以上均不是"]
图示体系,质点的运动方程为:() ["A","B","C","D"]
二尖瓣狭窄的病理生理改变哪项是正确的() ["肺血管阻力增高","轻度病人降低左房压可提高心排血量","左室舒张期负荷过重","左房压>25mmHg,100%病人血管外肺水增多","瓣口面积<1.0cm2时,肺血管阻力急骤降低"]
关于主动脉瓣狭窄,说法不对的是() ["正常的左房收缩对主动脉瓣狭窄病人十分必要","主动脉瓣狭窄的三大症状是心绞痛、晕厥和呼吸困难","主动脉狭窄时左室向心性肥厚是主要代偿机制","冠状动脉正常的主动脉瓣狭窄病人不会有心绞痛","主动脉瓣狭窄病人术中心肌保护较一般心脏病手术更重要"]
图a)体系的自振频率ωa与图b)体系的自振频率ωb的关系是:() ["ωa<ωb","ωa>ωb","ωa=ωb","不能确定"]
金融机构办理贷款业务时禁止的行为有哪些?