?????????????е???????
???θ???θ??θ?
??????θ?￡?θ
?θ?
1
???Щ?????????壬?к??
???????￡????飬???????θ??
2??
?????θ????У???к???θй?
2??2ò?3~5棬??60%??25~26??
3?
????????????θ????λ????
???λ?а??θ????λ????á
4?
?????????в????????Ч?????Щ
?θ麮??????
費??????衢??
5?
???θ???????θ??
θ????θ??????????????????
6???
??尾???????????θ
???????????
7?ζ
???С???ζС??????????θ?
?????θ?θ????????
8?
??θ????θ?
9???
?θ????????θ?
?????????￡?????θ?θ?θ?
10?
???????顢飬??θ??
??á?11??С??
4?θ
з??е???θ

??С??Ч?θ?θ?к???????1~2飬1??Ч

???飬????????????е????????
????￡???С???????б

??????????????5??1~2Ρ
????θ??θ??к???
С
??????θ???????2~5Ρ
?θ???4?θ
?2??????θ?????к??





               ? ?