?λ????α??????淨(jìng)????

?λ?????,?λ????ι???,?λ????α?????

?λ????α??????淨(jìng)?????

???????淨(jìng)?????????????????μ???Σ?????μ?????????????????????μ??????????????????????齫???y?????

????????????20??55-21??00

??????????21??00-22??00

??????????????→?????(????????)

?淨(jìng)??

?????≥50??????????????????ɡ?

1???????????????(??????)??????????(??????????????)

2?????????????????????

?????飺50~69??????????70~89?????????飺89????

3??????????????→?????????????????????????????????????????

?????????顢????????????????????(??????????????????????)

?????????????????????????5????????????ν???50??????????????????

?????

1??????????????????????齫???y???

2????????????????????

3?????????ж?????????????????????????????????????

0 0 ????λ??????λ????ι????λ????α?????