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问题 单项选择题

有关布比卡因的心脏毒性反应，以下叙述哪项正确（）

A.血管内误入逾量的布比卡因对心律失常有一定治疗作用

B.妊娠妇女对布比卡因的心脏毒性不敏感

C.布比卡因引起的心血管意外，复苏困难

D.可以用利多卡因纠正布比卡因引起的室性心律失常

E.酸中毒和缺氧降低布比卡因的心脏毒性

答案

参考答案：D

单项选择题

谷坊一般布置在（），沟底下切剧烈发展的沟段。

A.沟底比降较小

B.沟底比降较大

C.河流岸坡

D.较大沟道
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单项选择题

Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation.

About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag.

（26）（）

A．partly

B．gradually

C．shortly

D．clearly
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