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

????:????vx:?????

?7???1?? (??)??7????????1?9?????24?????????????????????????????????????????????,?????????????????????????????????????????(120??????~160??????????????),??(??40?~60?,??????80????)??(8????????????,?10??)???

6??????????30???????????7???7????1????7???????,???????????????????????????????????772??50???,?22.1%;67??100??,??1.9%;???174.1???

??,7????1??,??????,?,???(??????) ??????????????:???