????:1???????:??????????

2?????

3?600?3???????

4???????150????

5???????

??12?4??? (?? ?????????????)?????,???12?????4??????????????????????12?????????46???,?,??,?????????????,????????????????????????“?”???????????

?????????SAR(????)?????????????,????????????,???????

12?????????????????4?,???????????????????,???????????????? ??????????

??????“??”??,????????????????????????????,??????????????????????????????????????????????,?300???????????????????450?,????1.4????1.8????,????????????

?28???????(???)

????:??