?? ??? ????“????????”???????
????:1??????????:??????????
2???????????
3???????????
4???????
5??????????
?????????????12?????????????4? (???????????????? ?)??????????,????12???????????????????4?????????????12?46?????????,????,?????????,?,?????????????????“?????????”?????
?SAR(?????)?,??,????
12??????????????????????4????????????,??,????????????????? ???????????????????????????“??”???????,?????????????????????????,?????????????????????????????????????,??????300????450?,??1.4?????1.8?,?????????
?28????????????????(?????????)
???????:???