11??????30??????????,?????????????3.85???????????????????????????????,??“?????????????”???,???????“???”??,??????,???“??”???????????????,“????”??“??”,“?????????????”???,?????????“?????????”????,???

?????:?? “????????”_????

?? ???“??????”???(?????)

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

2?????600

3?????

4???????sn

5???????

11??????30??????????,?????????????3.85???????????????????????????????,??“?????????????”???,???????“???”??,??????,???“??”???????????????,“????”??“??”,“?????????????”???,?????????“?????????”????,???

?????:??