?? ??15??????????? ???????50%??????
????:1???????????:??????
2????????
3???????????
4??????????
5???????
?????11??27?????? (???? ??)??????????????????27?????,???????????????????,?????????+???+??+??????????????15?????????????????????????????????????????????????????,15??????????????????????,??????50%????????????,????,????????
??,??????????????????????,????????,??????????,???????????????????,???????,15???????????????52.4%,????57.8%,???66.9%,??87.5%,???????????????????,??????????????????22?????8???????,????63.6%;???40?4?,?????????90%?
??,??????????????5???????,???+??????????????????????????????,??????????????,????(??)??9?39???19???183????????63??,???????????,?????
?,???????????????????,????????????????????,????????????????5.8??;???????????,??????26?3????????????,??,??????1992??;???????7*24??????????,????????,????1.7??,????????????????????,??????????
????,?????????????????????????????????????10??????????????IP,?????????????,????(????????????) ????:????????????