How many types i can import as file in FLA and what's the differences ??

Question

Hello
How many types i can import as file in FLA and what's the differences ??

Answer 1

you wouldn't import a .as file. 
you could open it in the flash ide (or any text editor) and edit it.
you could  create a fla and assign a document class which flash will compile into your swf.
you could create a library object in a fla, tick export for actionscript and assign a class that flash will compile that class into your swf.
you could instantiate a class object (using the "new" constructor) in a flash movieclip timeline or in another class file and flash will compile that class into your swf.
for Workers to extend a class use something like:
package
import Citizens;
      public class Workers  extends Citizens
       protected var baseSalary:Number = 1000;
           public function Workers()
               super();
          public function receivePayment():Number
                return this.baseSalary;