?? ??????????????
????:1?????????????:?????
2?????????
3??????????
4?????????
5???????
?(???):???(10????12???)??,?????????????,?????????????????????????????????????????5?????????
????????????????23?,?????30%??????????????,?????????10???,????????“????”?
??????,?????????????7???,?????????1200?????,???????????????27???42????70?????????????????80????????????,?????40????2????????????10??????????????7??42????
???,??????????????????????????????,?70%???????????,???13??? ?????:????