属于IB类抗心律失常的有（）。
A.奎尼丁
B.普鲁卡因胺
C.普萘洛尔
D.胺碘酮
E.利多卡因
参考答案：E
The computer is absolutely ______ amazing technological revolution. Just imagine what ______ fun it is playing computer games over the weekend!
A．the; the
B．an; 不填
C．不填；a
D．an; a
试述斯密的经济自由主义。
