????:1????????????:300??????????

2???????

3?????????

4?????????????

5??????????

??(??):???(10?????12????)???,???,?????????????????????????????????5??

????????????23???,???30%????????,????????????????????10??,??????????????“?????”?

????????????,???????7???,??1200?,?????????????????????27?????42???????????????70?????????????80?????????????,??????40????????2???10?7?????????42????

???,????????????????????????????????????????????????,???70%?????????,???13???? ?????:?????