????:1???????????:????300??

2????????100????

3????????

4?????sn????

5??????????

?????????6??????????????????????16??????????? (????????)????????,??16?,???20????????????,????“????????????”???

????,“???”???,???????????????????9???????????????????????,?????????,????????????????????

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

6??????????16?????????,“??????????”????????????????????????????????????? ?? ???????????

“??????????????????????”??????????????????«???»???

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

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

??,????????????????20???,?????????????,?????????????????????????????“?????????????????????????,???????????”???????,????????????????????:“???????????,???????”(?????????????????????)

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