问题 选择题

在视觉形成过程中,视神经的作用是(  )

A.接受视网膜上物像,产生冲动,并传给视觉中枢

B.把视网膜产生的神经冲动传给视觉中枢

C.接受视网膜上的物像形成视觉

D.接受视网膜上的神经冲动,形成视觉

答案

答案:B

完形填空
完形填空。
     One of my friends did business with somebody else a few years ago. Their freighter(货船) was
upturned by a storm    1  and their hope, together with their merchandise vanished   2   . He was so
upset by the blow that he became  3   and couldn't   4   concentrate his attention. His _5_  who suffered
the same catastrophe never lost heart. His days went on as     6   as before. My friend asked him how he
could   7   it. He said:" You curse, you grieve, life goes on as usual; you are happy and enjoy yourself, the world   8   as usual. Which course do you follow?"
    That's how a person leads his life. When you are optimistic and in a good  9   , your future seems sunny and bright.  10  , when you are worried and have your mind    11   in sadness, your future will turn dark.
The latter situation, if you allow it   12  , will cost you a great deal. You will lose   13   and courage to fight
for the better. You will    14  the joyful things that come your way. They are really the most important, the most reliable part of links of our life. If they get loose and drop    15   , how can you keep happiness?
    There's a poem   16   : "Whether you are   17   or not, whether you like or dislike, show attention or 
18  , flowers bloom luxuriously all the same." Yes, that's   19  . Just as flowers keep blooming, fine days
are passing away day after day. How to spend your days - joyfully or   20    - will entirely depend on
yourself.
( )1. A. at the sea      
( )2. A. in a moment    
( )3. A. worry          
( )4. A. even            
( )5. A. family          
( )6. A. colorfully     
( )7. A. do with         
( )8. A. does            
( )9. A. condition      
( )10. A. On the other hand
( )11. A. caged          
( )12. A. continue      
( )13. A. trust          
( )14. A. let go        
( )15. A. each other    
( )16. A. reads          
( )17. A. know          
( )18. A. ignore        
( )19. A. one            
( )20. A. carefully      
B. by the sea    
B. all of a sudden  
B. eager          
B. no longer      
B. partner        
B. sadly         
B. try            
B. runs          
B. situation      
B. Therefore      
B. to cage        
B. going on      
B. confidence    
B. catch up      
B. one after one  
B. which reading  
B. aware          
B. not            
B. that          
B. naturally      
C. at sea           
C. in sudden       
C. low-spirited    
C. never            
C. parent          
C. painfully        
C. settle           
C. goes            
C. mood            
C. On the contrary    
C. cage              
C. keeping on      
C. wisdom          
C. give away        
C. one after another  
C. that writes      
C. understand      
C. reject          
C. it               
C. faithfully      
D. by sea        
D. at once      
D. high-spirited
D. ever          
D. colleague    
D. wealthily    
D. manage        
D. keeps        
D. behavior      
D. Moreover      
D. caging        
D. to last      
D. ambition      
D. hand out      
D. one another.  
D. that says    
D. aware of      
D. avoid        
D. what          
D. sorrowfully  
探究题