????:1?????????????:??398???

2??????

3???????

4?????680?24???

5?????????????

2???????????21?????????,?????????????????(???????????)???,???????????????,????????????????????????????????????????????????????????????????

????(???????????????????????????)????????,?“???”,???????,??????????,????“?”“?”???????“????”3???,????????“1+3+N”??????????????

?? ???? ?????????????? ????

??????:????