可使心输出量增多的因素有()
A.主动脉舒张压升高
B.左心室舒张末期容积增大
C.肺动脉平均压升高
D.心率加快
E.回心血量增多
参考答案:A, D, E
The little boy has been nice recently and he thinks he a toy train for Chirstmas.
A.selects
B.deserves
C.requests
D.debates
煤气管道可随意接皮管。