问题 单项选择题 B型题

抗孕激素,用于抗早孕()

A.丙酸睾酮

B.米非司酮

C.炔雌醇

D.醋酸氢化可的松

E.氯米芬

答案

参考答案:B

解析:醋酸氢化可的松的化学命名为11β,17α,21-三羟基孕甾4-烯,二酮-21-醋酸脂;炔雌醇为雌激素类药物与孕激素合用有抑制排卵协同作用;米非司酮为抗孕激素,可用于抗早孕。

完形填空
完型填空
     Many people go to school for education. They learn languages, history, geography, physics, chemistry
and math. ______(1)go to school to learn a skill so that they can ______ (2). School education is very
important and useful, ______(3)no one can learn everything from school. A teacher, no matter ______ (4) he knows, cannot teach his students everything they want to know. His job is to ______(5) his students to
know how to learn. He teaches them how to read and how to think. So, much more is to be learnt
______(6) school by the students themselves.
     It's ______(7)more important to learn how to study by oneself than to memorize some facts or rules.
It is quite ______(8)to learn a fact in history or a formula(公式)in math, but it is very difficult to use a
formula in ______(9)a math problem. Great scientists, ______(10) Newton, Galileo and Edison, didn't
get ______ (11) from school, but they were all successful. They invented ______(12)many things. The
reason for their success ______(13) that they knew ______(14)to study. They read books that were not
taught at school. They worked hard ______(15)their lives, wasting not a single moment. Above all, they
knew how to use their brains.
(      )1. A. Another  
(      )2. A. get education
(      )3. A. but    
(      )4. A. how    
(      )5. A. ask    
(      )6. A. outside    
(      )7. A. nearly    
(      )8. A. easy  
(      )9. A. writing    
(      )10. A. with    
(      )11. A. anything  
(      )12. A. very    
(      )13. A. is       
(      )14. A. where  
(      )15. A. all    
B. Others       
B. read more books
B. then        
B. how much      
B. make        
B. in        
B. almost      
B. difficult      
B. findin g     
B. like        
B. something     
B. so          
B. are          
B. which          
B. of          
C. The other  
C. pass the exams
C. and      
C. when    
C. help    
C. at    
C. always    
C. important    
C. answering    
C. but      
C. nothing  
C. much    
C. was      
C. how      
C. during      
D. The others  
D. make money  
D. however    
D. how many    
D. tell        
D. from        
D. often      
D. necessary  
D. solving    
D. except      
D. everything  
D. such        
D. were        
D. why        
D. with        
单项选择题