????:1????????????:???????

2?????????

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

4?????vx??????

5??????????

??????????12?????????2??? (?????????????????? ?)???????????2????????????????????,???3??,??????????200????2???????????????????“????”,?????????????

????(???)

????????????????,??????????????(???????????)?,?“???? ???????????”?????????

????,??????????????????“??????????”????,???????????6??????????1012?“???”??799??????,??????????????????????????????“???”????????????????????,??,??????????????????????????????,??????????????

???,“?”?????????,????“????”,???????????(????????????????????)?????;????,??“?????????????????????????????????????”;?,??“?????????”?

???,??“???????”??????????,??????,????????????10????????????;???????????,???????????????,?????;????,??????????,????7????,????1??;??????,????A????B?????????????????,??

???,????“?????????”?????,????????????????“?”,???????????????????????????????????????????????,???????,???“???”????????“????????”???????,???????????(????????????????)

?????:???