问题 单项选择题 A1型题

酚妥拉明可用于治疗顽固性充血性心力衰竭的主要原因是其可()。

A.兴奋心脏,增强心肌收缩力,使心率加快,心输出量增加

B.抑制心脏,使其得到休息

C.扩张肺动脉,减轻右心后负荷

D.扩张外周小动脉,减轻心脏后负荷

E.扩张外周小静脉,减轻心脏前负荷

答案

参考答案:D

解析:酚妥拉明可用于治疗顽固性充血性心力衰竭的主要原因是其可扩张外周小动脉,减轻心脏后负荷。故本题选D。

阅读理解

根据短文内容,回答下列问题。

     Nowadays more and more people in the world are getting fatter, which troubles them a lot. In the past 25

years, the number of the people with obesity (肥胖症) in Europe has doubled. Experts say that it has a lot to

do with our eating habits.

     Our eating habits are very important for good health and a strong body. Most of us like eating sweets and

ice cream better than meat and rice. Sweets and ice cream are not bad for us if we eat them at the end of a

meal. If we eat them before a meal, they may take away our appetite (食欲).

     It's important for us to eat our meal at the same time each day. When we feel worried or excited, we may

not want to eat. A long time ago, in England, some judges often decided whether a man was tell-ing the truth

by giving him some dry bread. If the man could not swallow (呑) the bread, it meant that he wasn't telling the

truth. A man who is worrying something has difficulty in swallowing anything dry, because he loses his appetite.

1. Are more and more people getting fatter in the world?

    ________________________________________________________________

2. Do most people like eating sweets or meat?

    ________________________________________________________________

3. What may happen to people when they feel worried or excited? 

    ________________________________________________________________

4. Why did the judges give some dry bread to the man in old England? 

    ________________________________________________________________

5. What are good eating habits? 

    ________________________________________________________________

单项选择题