问题 单项选择题 A1/A2型题

肝性脑病时的氨基酸代谢紊乱指()。

A.芳香族氨基酸的代谢产物抑制大脑皮质

B.酪胺和苯乙胺阻断神经冲动传递

C.血浆支链氨基酸和芳香族氨基酸比例失调

D.肠源性氨进入门静脉

E.肠源性氨进入体循环渗入血脑屏障

答案

参考答案:C

解析:重症肝病患者,血中芳香族氨基酸增加,支链氨基酸常有降低,使支链氨基酸与芳香族氨基酸比值下降。

单项选择题
阅读理解

阅读理解。

     Tradition ways that at the begining of the sixth century one of the tribes (部落) in Ireland was called Celt.

The chief (酋长) of Celt had a beautiful daughter, named Ellis, who was from childhood, fond of having honey.

When she grew up, lots of knights (骑士) and princes from neighboring countries came to propose marriage

to her. Ellis fell in love with a young master of a southem tribe who was among the proposers. They were soon

in love with each other. At last they decided to get married. On the wedding day Ellis entertained (款待) the

honored guests with honey wine made from the honey which had been presented by the young master. After

drinking the wine the guests sang high praise for it. They said the wine was as sweet as love. But there was too

much wine for them to drink up. The bride (新娘) and bridegroom (新郎) continued drinking it next day. They

were intoxicated (沉醉) with the sweet honey wine. It took the young couple a whole month to drink it up.

     From then on it was very popular among the local people to drink honey wine within the first month after

the man and woman's marriage. They thought that it stood for the sweetness and happiness of a newly-married

couple. Later on it spread far and wide. People named the first month after marriage honeymoon (蜜月).

1. In Ireland there was a tribe named Celt _____. [ ]

A. thousands of years ago

B. after the sixth century

C. before the twenties of the 6th century

D. about fourteen centuries ago

2. Among the proposers Ellis fell in love with a young master _____. [ ]

A. of Holland

B. from a southem tribe

C. came from France

D. of her own tribe

2. Among the proposers Ellis fell in love with a young master _____. [ ]

A. of Holland

B. from a southem tribe

C. came from France

D. of her own tribe

4. How long did it take the bride and bridegroom to drink up the left over honey wine? [ ]

A. Over forty days.

B. Around a month.

C. A month less three days.

D. A full month.

5. Which title could be the best for the passage? [ ]

A. The Origin of Honeymoon.

B. How did the tribe of Celt Come Into Being.

C. Something about the Bride and the Bridegroom.

D. What Happened to a Tribe.