不挂科搜题免费

问题:

【填空题】心脏的防逆流结构有二尖瓣、三尖瓣、主动脉瓣和肺动脉瓣。 当心室肌舒张时, 和 开放,而 和

答案:

["二尖瓣","三尖瓣","主动脉瓣","肺动脉瓣","主动脉瓣","肺动脉瓣","二尖瓣","三尖瓣"]