?? “?”?????? 12?????21??????
????:1????????200???:????????????
2???????????
3??????????????
4?????????????
5?????????
??????12????????21???????????(?????? ??????????)21???????????,??????3??????,“??????????????”?????????????,????
12???21????????????????????,?????????3????,“??”????????? ?????? ??????????????“???”,??????????????????,?,??10????,????????????????
???????????,“?,???????,??????,???????,????,????”
??????????????“????????”??? ???????? ????,????,“?????????”??????,???????????1000????,????????????????????????3000??
???????????,“????”??,??????,???LED??,?????????????????????????????????????????????????,??????????????????????????????????
“????????”????????????,??? ?????????????? ??,???,??????????????,???????????????????????“??????+?”?????,??120?????????????????????????????????????????,????????????????????????????????????????????,????????????????????????,??(??)
???????:??????