问题 单项选择题

治疗强心苷中毒所致快速型室性心律失常的最佳药物是

A.苯妥英钠
B.乙胺碘呋酮
C.普鲁卡因胺
D.普萘洛尔(心得安)
E.奎尼丁

答案

参考答案:A

解析: 苯妥英钠可与强心苷竞争Na+-K+-ATP酶,同时促进肝脏对强心苷的代谢,还可降低窦房结、房室结自律性,并改善受抑制的房室传导,可用于治疗强心苷中毒所致快速型室性心律失常。

单项选择题

阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。学科&网

Hundreds of people have formed impressions of you through that little device(装置) on your desk. And they’ve never actually   41   you. Everything they know about you   42   through this device, sometimes from hundreds of miles away.   43   they feel they can know you   44   from the sound of your voice. That’s how powerful the   45   is.

Powerful, yes, but not always   46  . For years I dealt with my travel agent only by phone. Rani, my faceless agent whom I’d never met   47  , got me rock-bottom prices on airfares, cars, and hotels. But her cold voice really   48   me. I sometimes wished to   49   another agent.

One morning, I had to   50   an immediate flight home for a family emergency. I ran into Rani’s office   51  . The woman sitting at the desk,   52   my madness, sympathetically jumped up. She gave me a   53   smile, nodded while listening patiently, and then printed out the   54   immediately. “What a wonderful lady!” I thought.

Rushing out   55   I called out over my shoulder, “By the way, what’s your name?” “I’m Rani,” she said. I turned around and saw a   56   woman with a big smile on her face waving to wish me a safe trip. I was   57  ! Why had I thought she was cold? Rani was, well, so   58  .

Sitting back in the car on the way to the airport, I figured it all out. Rani’s   59  ---her warm smile, her nods, her ‘I’m here for you’   60  ---were all silent signals that didn’t travel through wires.

59()

A.forgiveness

B.eagerness

C.friendliness

D.skillfulness

单项选择题