某女，31岁，妊娠合并风湿性心脏病，孕28周，心功能Ⅱ级，无早期心力衰竭的体征。该产妇心功能的状态是() ["A．一般体力活动不受限制","B．可以从事任何活动","C．一般体力活动明显受限制，休息时无不适","D．一般体力活动略受限制","E．极易发生心力衰竭"]
妊娠合并心脏病的护理()妊娠合并急性病毒性肝炎的护理() ["A．第二产程用力屏气，快速结束分娩","B．做好消毒隔离，加速产程进展","C．清洁灌肠","D．保护、改善心功能状况","E．产后母婴同室"]
肺的闭合容量是指() ["A．两侧肺呼出的气量","B．一侧肺呼出的气量","C．闭合气量","D．余气量","E．闭合气量与余气量之和"]
妊娠合并心脏病的妇女分娩期应如何防止心力衰竭的发生?
生理无效腔量在潮气量中约占多少() ["A．40%","B．30%","C．20%","D．10%","E．5%"]
简述妊娠合并心脏病早期心力衰竭的征象。
