每搏输出量占下列哪个容积的百分数称为射分分数
A．回心血量
B．心输出量
C．等容舒张期容积
D．心室收缩末期容积
E．心室舒张末期容积
参考答案：E
The children ______ a PE class on the playground when it suddenly began to rain. [ ]
A. have
B. are having
C. had
D. were having
以下哪一项不是痿证的病因病机：（）
A.肺热津伤，筋脉不得濡养
B.湿热浸淫，宗筋弛缓
C.肝肾精亏，筋脉失于濡养
D.病位主要在四肢筋脉
E.病位主要在阳明经脉
