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

2??????????150

3????????

4??????vx

5??????

?????????????????6?????7? (?????????????? ???)??6????7?????????

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

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

????:“?????????”??????????,??????“????????”????????10??,???????????150????30?????200???“??????????”????????????????“????”????????????,?????????,?????

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

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