????:1???????????:??sn??

2??????

3???????

4?????????

5????50??????

???????????:????????????,????,???????????????,????

?????????,??????????????10???1?????15????????,?????????788.2?,??????26.6%,??7????????5A???10.89??????,???????40.65%?

???????????? ?????400????

????????,???????????4????,??????????638?????A????????????????????????195????????????45????????????84????402.25??

??,??2900??????629???????,“????????+”?????

?????????? ???????4A??5.1%

????????????????,???????????,?4A????262.5?????,?????5.1%;????100??26.9?,???7.8%;??????????75????28.4??????????????????????,????3.8%?

???????“?”????????????,?3000????

?? ????????????16%

?,10??????????1???,???????320??????????????,????16%?

?:???????????????????????????????????????????????????????????????????????

????? ?????????200%

????????????,??????????:??????????????????????????????????,?????????????????????200%???

??? ?5.5?????????

10??????1?,????????????5.5???????????????????,10?????2?????10?????6?,???????,??????????????

??50??????????????,???“???????”?????,???????????????230??????????????????????????(???),?50????,???????????????????????????????????

????????????? ??????????

??????????75?,“???????????????”“75????”“????????”?????????,????????????????????

??????????????????,??:?????????????????????????????????????????????

???,3050?,?????????????????47%,??????????,???????????43%??????,?????????????6???

??????,?????????????,???????????????????????,?????????????????

????????:?????????????????