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??????????50????????????????
??   2010-12-27 06:54 ??????
???   2010-12-27 18:16 ???????????????????

.????21?????28????35??????35????????????

??40?????????????????????????? ?????????????45-55?????????? 47.5???49.5?????????

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48

???,???,?????.??,??,???46-47,???,???,?50.
??????,?:
(1)??:????,20~30?2~3???.?,??4~5??,????.
(2)?:?????,????,??1~2?????,????,??,??,?,.????.??,??1~2,????.????,???,40???,??,???.,??.???.?,?282???,181??,?63.8%.
(3)??:??????,????,??,??????.?282????,40??,?14.1%.,???.
???????,??,2~4,?,?????.
??????,??6...