???????2??·??????????

???????2??·??,???????2??·???淨(jìng),???????2??·???????

???????2??·???淨(jìng)?????????2??·??????????????????????????????????????????????ó???????????????????????Ч??????譚??????????????

?????????????≥50??????~???? 18:00-18:30

???????????????????????????????????????????≥1000???????????????10????????

???????????С?????б??估???????????????????????????????????????????????????????

?С?С????????????????????????Χ?????￡???????????????????????￡?????????????????*1??

??????????????5???????????????20????????

???????????????λ????????????????????Χ??????????????20????????

?????裺??????????50%?????????????5??20????????

???????壺????????????????壬??????????Χ???е?λ????3??50????????

??????????????30%?????????????5??20????????

???????????????????10%?????????????10??20????????

a.С???????????????Χ??????????????????????????????????

b.?????????????????λ????????????????????????????????????????????

c.????????λ??????????λ?????????t?????????????????????*1?????и???????????????????????????????