????:1????????:??????????

2??????????????

3???????

4??????

5???????

?????????????????????????????12??????21???????(??????????????? ???????????)21??,????????3??????????????,“??”?????,??????????

12?????????21??,????????????????????????3????????,“???????????”??????? ?????????? ???????????

???“???”,??????,??,??10????????????????????????,???????????????????????????????????????

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

??“?????????”????? ?? ????????

??,??????,“??????”???????????,?????????????1000????????,????????3000??

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

“???????????”??,?? ???? ??????

???,??????????????,????,????????????“?????+?”?,??????120???????????,?????????????????????????????????????????????????????????????,????????????????????,?????(???)

???????:???