| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |
| 
 
 | |
| Unfortunately, its simplicity is also its weakness since it is frequently too simple to represent realistic problems.  | |









 发表于 2007-9-3 15:52
 |
发表于 2007-9-3 15:52
 | 

 
 




 
  
 
 
  
 