????:1????????:??????power

2????????

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

4???????????

5????????

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

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

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

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

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

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

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

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

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

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