问题 单项选择题

茵陈保肝作用的机制是

A.有效成分水解生成葡萄糖醛酸

B.保护生物膜

C.兴奋垂体-肾上腺皮质系统

D.降血脂

E.抑制葡萄糖醛酸酶

答案

参考答案:E

解析:茵陈能抑制β葡萄糖醛酸酶活性,提高UDP-葡萄糖醛酸转移酶活性,增强肝脏解毒功能。

完形填空
完形填空。
     Napoga Gurigo is a 12 -year- old girl in Ghana, Africa. It is    1    for her family to get clean water. The
nearest place to get water is a dirty hole half a kilometer from their    2   .
     Every morning, Napoga    6    home at half past five to get water for her family. Sometimes it    4    six
hours to get enough clean water. Napoga has no time to go to school    5    play with her friends. Millions of
people in the world are like Napoga. They can't get enough clean water to    6    healthy. Most of those people
are in Africa. Water covers 70 per cent of the Earth's surface. But most of that is sea water. We can't use it
for drinking or cooking. Fresh water is    7    we use to drink, take showers and cook food. But fresh water
    8    only 1 per cent of the Earth's surface.
     Many people have made wells to get clean water from     9   . But there still isn't enough. Scientists say
that in 30 years, more than half of the people in the world    10    have enough clean water.
(    )1. A. easy    
(    )2. A. school  
(    )3. A. goes    
(    )4. A. spends  
(    )5. A. and      
(    )6. A. keep    
(    )7. A. that    
(    )8. A. takes    
(    )9. A. under the surface
               of the ground 
(    )10. A. won't    
B. hard
B. city
B. stays
B. costs
B. or  
B. get 
B. /    
B. runs
B. above  the surface
    of the ground
B. will 
C. fun     
C. country   
C. leaves    
C. pays      
C. but       
C. have      
C. what       
C. flows     
C. the rivers 

C. can     

D. impossible 
D. village   
D. comes     
D. takes     
D. while   
D. do       
D. when    
D. covers   
D. the sea 

D. can't    

单项选择题