??12??????????19????? ?19??????

??,??????????????25??????????????,????????????????????????????????????,???????????????????,????,????????,?,???????????,?????

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

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

????????????????????????????(?????????????) ?????????????????????????????:??????? “??????????”????

?? (????25??)????????????

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

2???????

3????????

4???????

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

??12??????????19????? ?19??????

??,??????????????25??????????????,????????????????????????????????????,???????????????????,????,????????,?,???????????,?????

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

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

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