伴消化性溃疡的高血压患者可选用（）
A.维拉帕米
B.尼莫地平
C.硝普钠
D.可乐定
E.氯沙坦
参考答案：D
Edward, you play so well. But I _____ you played the piano. [ ]
A. didn't know
B. hadn't known
C. don't know
D. haven't known
软交换控制设备ZXSS10SS1b的设计中，三框级联时，BHCA值高达（）M.
A.3
B.6
C.9
D.12
