?? ????????????????
????:1????????:????
2?????
3???????
4????????
5??????????
?????12??28?? (??? ????????????)??27????,?????????1000???(?????)???
??????,????,????????,?????????1000??????????(????)???,????????????????????????????????????????,??????????????????????????????????????????????
??????????,?,???????????????“3I”?????,????“?????????????????????”,??????????????????????,???(???)
??????:??????