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A.房室瓣開放,半月瓣開放 B.二尖瓣關(guān)閉,三尖瓣開放 C.房室瓣關(guān)閉,半月瓣關(guān)閉 D.房室瓣關(guān)閉,半月瓣開放 E.房室瓣開放,半月瓣關(guān)閉
A.等容收縮期 B.心室射血期 C.心室舒張期 D.心室舒張期+等容收縮期 E.室射血期+等容收縮期