?? “??????”????? 12??????21?
????:1????????:????????
2????????????
3???????
4???????
5?????98
???12???????????21??????????????(?????? ????????????????????????)21??,??3??,“????????”???,??????????????
12?21???????????,?????????????????????????????3???,“?”????????????? ?????? ??“??????”,???????????,??????????????,?????10??????,??????????????????????????????????????
????????????????????,“??????????,????????,??,??,????????,?????”
??“???????????”?? ?? ??????????????????????????,?,“??????”???????????,????1000?????????,????3000??
???????????,“?????????????”???????????,??,?????LED???,??????????????????????????????????????????????????????,?????????????????????????????????
“???????????????”??,??? ?????????????? ???????????????,????,??,??????“???+???????????????????????”???,???120?????????????????,??????????????????????????,?????????????,??????????(????)
????:????