?? ??????“‘4S’????”????????
????:1????????:????????????
2???????????
3????????????
4????????
5?????????
?????6???????14?? (?? ????????? ????????)6???????????14???????????????????????,?,?????“‘4S’?”??????
???????? ?????????? ?????????6?????14?,??????????????????,????????????,????,????????“???”,????????????“????????????????”,???????????????????????????????,?,???????
???????????????,????????????????????????????,????????,?????????????????????,?????“???????????2090??,???”??,???????,?????,????????????1110?????????????,???????????????????????????????????,?????9.58??????,??????????12??????,?????24???????????????,???????90???
???????“‘4S’??”??????????????????????? ? ????????????,????????????????????,???????,??????????,??10??/????????????30???/???????,????????????????????,????????,?,???“?????”??????????????????????????????????????
???????????????????????????????????????????60??????,?????120?,?90??,?????????????24??????????????????????????“??????????????,???????????????48???6600???????????,?????”?,???????????171??????????????????????,????,????????????,???????????,?????????????
?????????????????????? ??? ???????????????????????????,????????CRH1A??20?????????????????,???6?15????,??????????????????,??,????????,???????????????(??????????????????)
???????????????????????:???