? ???

?????飬?????й???????л???????????????о??????

???????????????29??????????г塰??????′?

?

?????У???λ??·???λ?????ζλ???????ù?????????Э鹤?н??乤??Ч??Χ?е????о?Ч????Ч?��

???

????Сá?????????磬??????????У???????????????????顢????????????????????????��??????棬??????

??

??棬????н????λ???1???500???????????????С???ν???棬??????????г????д????顣???棬?????????????н??????棬??????????

??

?????Ρ??仧???籣??а?仧????????????????ηΧ?????д???????У???

?

?????в????????????о????ж????о?????о???г???3??н????????Ч?????Ч????Ч档???????????????

??

?о??棬·???????￡??е?????????桢?????????·??еλ?оо????????о?и?????????еλ?????????Э鶨?г??????????У?????70%?????С

???

???????·棬??·??м????????棬???????С????????????????????????棬????????????????裬???·??

????????

????????????????????????????????????齨??????????????????????????

??????? й??????????????齨???γ???μ

??г?ж?塣δ?????????????????????й??????????úá ?￡