Choose the correct answer.What is the definition of a smart material?
      
        
        
      
     
    
      
        
        
          
            - A material that has been engineered to have additional properties
- A material that is available in large sheets
- A material which physical properties change in response to the external conditions
 
    
    
    
      
        К сожалению, у нас пока нет статистики ответов на данный вопрос,
        но мы работаем над этим.