单项选择题
A.等容舒张期容积 B.等容收缩期容积 C.舒张期末期容积 D.收缩末期容积 E.心室肌收缩所遇到的阻力
A.20% B.30% C.35% D.40% E.45%
A.65mmHg B.45mmHg C.32mmHg D.28mmHg E.25mmHg