主要用于减慢心率的钙离子拮抗剂是（）
A.硝苯地平
B.维拉帕米
C.氨氯地平
D.尼莫地平
E.桂利嗪
参考答案：B
下列吗啡的中枢作用中，不正确的是
A．镇静、镇痛作用强大
B．抑制延脑呕吐中枢而镇吐
C．兴奋动眼神经核产生缩瞳
D．作用于延脑孤束核产生镇咳
E．促进组胺释放降低血压
When in his rebellious years, that is when he was sixteen or eighteen, Frank Anderson ()going around with a strange set of people and staying out very late.
A. took to
B. took up
C. took on
D. took in
