?????????????????6????????21?????(???? ??????????????)????21??????????,??,????????????“????????”,????????????

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

?????????????????????,????????,?????????????,??????,??????????????,??????????,??????????,????????,?????????????????,??

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

?????????????????,???,??????????????,?????????????,?????????????,?????????????,???????

????,??????,??????????????????????,?????????????,??,??????????,??????,??????????,????????????????(??????????) ????????????????:??? “???????????”_????

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

????:1????????????:????wx

2??????????

3?????+Q

4?????

5?????????

?????????????????6????????21?????(???? ??????????????)????21??????????,??,????????????“????????”,????????????

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

?????????????????????,????????,?????????????,??????,??????????????,??????????,??????????,????????,?????????????????,??

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

?????????????????,???,??????????????,?????????????,?????????????,?????????????,???????

????,??????,??????????????????????,?????????????,??,??????????,??????,??????????,????????????????(??????????) ????????????????:???