属于苯烷胺类选择性钙离子通道阻断药是（）。
A.硝苯地平
B.维拉帕米
C.普尼拉明
D.哌克昔林
E.氟桂利嗪
参考答案：B
16x2-4y2．
—I wonder how to________to him when I get a present from my foreign friend Jack.
—Of course say "Thank you". [ ]
A. invite
B. answer
C. manage
D. react
