?? ????????????
????:1???????????:???????
2???138?????
3?????????
4???????vx
5?????v
??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?,??,??,???(??) ??:???