????:1???QT???:??????????

2????????

3???????????

4?????????

5????????????

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

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

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

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

??“????????”???? ?????????????? ??????

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

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

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

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

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