迷走神经兴奋时()
A.延长窦房结与周围组织不应期
B.缩短窦房结与周围组织不应期
C.减慢房室结的传导
D.抑制窦房结自律性与传导性
E.加快房室结的传导
参考答案:A, C, D
腹部下方两侧膨大,触诊有波动感,叩诊呈水平浊音,常见于()
A.皱胃积食
B.腹膜炎
C.瘤胃积食
D.瓣胃阻塞
E.急性瘤胃臌气
He has been acting strangely these days.I can't ________ his actions at all.[ ]
A. account for
B. ask for
C. call for
D. stand for