题目内容
由平卧突然立起时发生如下变化过程( )
2021-10-17
A.下肢和腹腔回心血量突然减少
B.每搏输出量减少,血压下降
C.颈动脉窦和主动脉弓压力感受器传人冲动增加
D.交感缩血管紧张增加,心迷走紧张减弱
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