问题 问答题 简答题

简述视觉的机能与特性。

答案

参考答案:

视觉机能是视觉器官对客观事物识别能力的总称,它包括视角、视力、视野、视距、色觉、对比感度和视觉适应等。

完形填空
完形填空。
     I am a mother of three (ages 14, 12 and 3) and have recently completed my college degree.
The last   1   I had to take was Sociology and the last project of the term was called "Smile".
The class was asked to go out and smile at three people and note down their   2  .
     Soon after we were   3   the project, my husband, youngest son and I went out to McDonald's.
We were standing in line, waiting to be   4  . When all of a sudden everyone around us began to
back away. As I turned around, I smelled a   5  "dirty body" smell and there   6   me stood two
poor homeless men. As I looked down at the short gentleman close to me, he was "  7  " - his
beautiful sky blue eyes were full of the light as he searched for  8  .
     He said "Good day" as he   9 the few coins he had been holding. The young lady at the counter
asked him what they wanted. He said, "Coffee is  10  , Miss," because that was what they could
afford. To sit in the restaurant and   11   up, they had to buy something.
     Then I really felt it - the   12   was so great that I almost reached out and embraced the little man
with the blue eyes. That was when I noticed all eyes in the restaurant were   13   me, judging my
every action. I smiled and asked for two more breakfast meals on a   14   tray. I then walked to the
table that the men had chosen as a   15 spot, put the tray on the table and laid my hand on the blue
eyed gentleman's cold hand. He looked   16   at me, with tears in his eyes, and said, "Thank you." I
patted his hand and said, "I did not do this for you. God is here working   17   me to give you hope."
     I returned to college with this story in hand. I   18  "my project" and later the instructor read it to
the class. In this way I had   19   my classmates and the people around me. And I graduated with one
of the most meaningful lessons in my life -   20   acceptance.
( ) 1. A. class  
( ) 2. A. attitude  
( ) 3. A. arranged  
( ) 4. A. greeted  
( ) 5. A. familiar  
( ) 6. A. around  
( ) 7. A. eating  
( ) 8. A. agreement
( ) 9. A. counted
( )10. A. little
( )11. A. cheer
( )12. A. urge
( )13. A. lightedon
( )14. A. separate
( )15. A. relying
( )16. A. up
( )17. A. over
( )18. A. turned over
( )19. A. pleased
( )20. A. conditional
B. school  
B. thought  
B. assumed  
B. served  
B. pleasant  
B. besides    
B. drinking  
B. recognition
B. showed  
B. some  
B. warm   
B. anger
B. stared at
B. big  
B. pleasing
B. down  
B. out  
B. handed out  
B. confused
B. unconditional
C. work  
C. mind  
C. assigned  
C. cheated  
C. terrible  
C. behind  
C. crying
C. acceptance
C. grasped
C. any  
C. dress
C. sickness
C. fixed on
C. single
C. staying
C. around
C. through
C. turned out
C. frightened
C. emotional
D. degree    
D. reaction  
D. suggested  
D. seated    
D. strange    
D. beyond    
D. smiling    
D. welcome    
D. made      
D. all        
D. take      
D. sadness    
D. looked at  
D. special    
D. resting    
D. aside      
D. across    
D. handed in  
D. touched    
D. devoted    
问答题

试题三(15 分,每空3 分)阅读以下说明和C 语言函数,将应填入 (n) 处的字句写在答题纸的对应栏内。[说明]一棵非空二叉树中“最左下”结点定义为:若树根的左子树为空,则树根为“最左下”结点;否则,从树根的左子树根出发,沿结点的左孩子分支向下查找,直到某个结点不存在左孩子时为止,该结点即为此二叉树的“最左下”结点。例如,下图所示的以A 为根的二叉树的“最左下”结点为D,以C 为根的子二叉树中的“最左下”结点为C。

二叉树的结点类型定义如下:typedef struct BSTNode{int data;struct BSTNode *lch,*rch; //结点的左、右孩子指针}*BSTree;函数BSTree Find_Del(BSTree root)的功能是:若root 指向一棵二叉树的根结点,则找出该结点的右子树上的“最左下”结点*p,并从树中删除以*p 为根的子树,函数返回被删除子树的根结点指针;若该树根的右子树上不存在“最左下”结点,则返回空指针。[函数]BSTree Find_Del(BSTree root){ BSTree p,pre;if ( !root ) return NULL; /* root 指向的二叉树为空树 */(1) ; /* 令p 指向根结点的右子树 */if ( !p ) return NULL;(2) ; /* 设置pre 的初值 */while( p->lch ){ /* 查找“最左下”结点 */pre = p; p = (3) ;}if ( (4) == root ) /* root 的右子树根为“最左下”结点*/pre->rch = NULL;else(5) = NULL; /* 删除以“最左下”结点为根的子树*/return p;}