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

2????????????

3?????vx

4?????????

5??????????

??7?16?????????? (?)???,???????“?”???16?????,????????????????3????

7?16????,“????????????????”???????????????????? ? ???????

???????,??????????????????90???????????????????

7??????16??,“???”??????????????????????????? ???? ??????????????????????????

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

7???????16?????????,“??????”??????????????????????????????“???????????”???????? ? ??

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

????????????,???,?CG??????????????????????,??,??????????????:?????????????????????????????????

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

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

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