A.She isn't there in the morning.
B.Her assistant isn't there in the morning.
C.She won't have the forms he needs until the afternoon.
D.She isn't as busy in the afternoon.
第4题
心室肌的后负荷指()。
A.舒张末期容积
B.射血期心室内压
C.等容收缩期心室内压
D.大动脉血压
E.右心房压力
第8题
心室肌的后负荷是指()
A.心室舒张末期容积
B.心室收缩末期内压
C.大动脉血压
D.心房内压
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