????:1???????500?4???:????????

2???????

3???????vx

4????????

5??????

??11???????????????27????????? (????????????? ????)11????27?????,??8???????????27???,??????????????????????????????????,8??,27????????“?????”???????????

?????????8???????????

?,?????????????????8??,?????7.61??,?????????????19???????????,???????????????,?????????????,??“????”,?????????“????????”?????????????????

?8???????,???????????LED???????????????????????????,????????;????,??????????????;????????????????????,?????;????????,??,?????????,????????……

????????27??,??????????????????????,?????????????,????24.86??????,????23?????“?‘???????,?????’??”???????????,??????????????“?????????”?????????????

??27????????????????????????

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

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

???????????27??????????????????????????

?,8??27??“?”“??????????????”,?????????,???????????????????????????,??????????????????,????,???????????,??,???????????????(????????????????)

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