????1???4? (??????? ????? ??????????????)?????????4?,???16??,??????“?????????????????”,??,???????

???????????????16??????“?????????”??? ?? ???????

????????,?????????“????????????”?????,??,???????,??????

?16???? ??????? ???

????,?????????????????“?????????????”????????“??”,??????????????,?????,???????????“??????????????”,????????????(?)

??????????:?? ??“????????????”????

?? ???16???????“????”???

????:1?????????????:500?3???????

2??????????

3?????????????

4????????????

5?????a5??

????1???4? (??????? ????? ??????????????)?????????4?,???16??,??????“?????????????????”,??,???????

???????????????16??????“?????????”??? ?? ???????

????????,?????????“????????????”?????,??,???????,??????

?16???? ??????? ???

????,?????????????????“?????????????”????????“??”,??????????????,?????,???????????“??????????????”,????????????(?)

??????????:??