????:1?????600?????:??????????

2?????

3???300?????????

4?????Vp

5??????????

??(????):??????????????11???????25?????????????,“?”????????????,??,???

????????,??“????????”??,“??”????12.41%????13.84%,61%?????????,????????“?”??300?????????????

?????????????,“????”????320?????,??287??????,?????,????????????????????????????????????????????,?????????????????????????“?????????????????”???????????,“??”??????????5700?????

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