问题 单项选择题

实验发现,将小鼠突然置身于巨大声响(恐惧)中,小鼠大脑杏仁体内特定细胞更活跃,脑内一种特殊“恐惧蛋白”会增加,这种“恐惧蛋白”含量在一定时间达到 峰值之后自动消失。进一步实验发现,“恐惧蛋白”的消失归功于一种名为“GluA1”的物质。缺少GluA1的小鼠会保持与巨大声响相关的恐惧记忆,而其 他小鼠则不会。因此实验得出结论,研制GluA1类药物可以帮助人们删除痛苦或恐惧等不好的记忆,只留下快乐时光。以下哪项如果为真,不能质疑上述结论?()

A.小鼠跟人的神经系统差距较大,小鼠实验结果很难应用到人身上

B.杏仁体负责掌管焦虑、急躁、惊吓及恐惧等负面情绪的产生和调控

C.GluA1删除了恐怖记忆,也删除了自我保护的记忆

D. 长期服用GluA1类药物可能导致健忘症

答案

参考答案:B

解析:削弱题。题干的论点:GluA1药物可以帮助人们删除痛苦或者恐惧的不好的记忆,只留下快乐的时光。B选项,重复了题干中已知的事实,杏仁体掌管焦虑、急 躁等情绪,所以不能质疑。A选项是切断联系,说明实验结果不能用到人的身上,否定了实验结果在人体上应用的可行性。C、D项指出这种药物不仅能删除痛苦的 情绪,还能删除快乐的情绪,则说明这种药物不能起到应有的作用。故本题选B。

单项选择题
完形填空
完形填空。
     Teaching second grade is always a challenge. Each student arrives at school with his own needs and
difficulties. One year, a student called Billy   1   me with his behavior as well as his academic requirements.
He struggled daily with his   2   emotions and often became angry or violent. I knew that, to make   3   
progress, his emotions needed controlling.
     One   4   I tried to help Billy was to have him come directly into the classroom when he arrived at school.
Billy's mom would   5   me to alert (警告) me to a particularly emotional morning at home. Then, I would
focus on   6   his anger and calming him down before the other students arrived.
     One week our class was studying   7  . I thought one way to bring learning into the classroom was to
bring my dog Rocky to school for the day.
     That day began as normal. I was preparing activities focused on dog themes   8   I was told that Billy
had a   9   morning at home and I might need to get him  10 . As I was talking to his mom, Billy  11  into
the classroom. To Billy's  12 , Rocky immediately ran up to his new  13 , wagging his tail and licking Billy's
face with doggy affection. Billy couldn't  14  Rocky's charm (魅力) and began laughing as his anger melted
away.
     Throughout the day, Billy never left Rocky's side, feeding him, being gentle with him and even  15  the
other students while Rocky was sleeping.
     Billy was known for doing anything he could to avoid  16 , but on this day he found a good dog story,
"Clifford's Puppy Days," and read it to Rocky. How  17  I was at the sight of Billy reading happily! My little
dog was able to  18  Billy's day from one of anger and frustration to one of laughter, gentleness and  19 .
     That day Rocky more than helped me with my  20 ; he helped to change the life of a child! After that
Billy's behavior definitely improved.
( )1. A. challenged    
( )2. A. unforgettable 
( )3. A. physical      
( )4. A. advantage    
( )5. A. awake        
( )6. A. tolerating    
( )7. A. emotions      
( )8. A. after         
( )9. A. boring        
( )10. A. settled      
( )11. A. fled          
( )12. A. surprise      
( )13. A. protector    
( )14. A. resist        
( )15. A. educating     
( )16. A. exploding    
( )17. A. surprised    
( )18. A. urge          
( )19. A. admiration   
( )20. A. family        
B. cheated        
B. uncontrollable 
B. mental        
B. agenda        
B. call           
B. observing      
B. pets          
B. as            
B. fantastic      
B. punished      
B. stormed        
B. delight        
B. trainer        
B. describe      
B. envying        
B. reading        
B. disappointed    
B. shorten       
B. curiosity      
B. teaching       
C. benefited  
C. unconscious   
C. academic  
C. reason    
C. visit      
C. relieving  
C. botany    
C. when      
C. busy       
C. treated    
C. jogged    
C. shame      
C. friend    
C. reduce    
C. comforting 
C. arguing   
C. amused    
C. transform  
C. anxiety    
C. housework   

D. betrayed          
D. unfortunate        
D. authentic        
D. way             
D. sign              
D. ignoring           
D. diet             
D. before          
D. rough             
D. excited            
D. floated         
D. fear               
D. owner            
D. forget           
D. quieting         
D. apologizing                   
D. confused        
D. expand            
D. love              
D. performance