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