????1???????????21??????????? (??????????)??????????????,?????????30???????????????,????????“?????”?

??????????,???,????,?????????????????????????????,?????“????????,???????????????,?????????????,??????????”“00??”????,????,???

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

????????????? ?

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

???????????????????????????????? ???????????

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

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

???????????:????????? “???????”_????

?? ??“Z??”???“??????”

????:1????????:????vx

2??????????

3?????wx?

4?????????

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

????1???????????21??????????? (??????????)??????????????,?????????30???????????????,????????“?????”?

??????????,???,????,?????????????????????????????,?????“????????,???????????????,?????????????,??????????”“00??”????,????,???

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

????????????? ?

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

???????????????????????????????? ???????????

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

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

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