题目内容

某钙拮抗剂可抑制房室结传导，大剂量可致窦房结、房室结电活动消失，还可舒张冠状血管及外周血管，并可降低血压，在下列最可能的药物是：( )

A. 地尔硫卓
B. 维拉帕米
C. 硝苯地平
D. 氟桂嗪
E. 尼卡地平

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