????????????????????
?????????????????????????????ɡ?
??????300?????7???????100?????????
??????￡??????? ????? ?? ????? ??????????????
1)?????
??????300??=7??=??8??=24000?????????38??=1??=3000???
?????100??=3??==??4??=12000?????????25??=1??=3000???
2)?????
??????300??=?????????????????38????????????????????8?????
?????100??=????????????????25????????????????????8?????
???
1)???????????????????????10??
??????15~20??????????????С????????????????????
???????????????????2С?????????????3000????????????????????????
2) ????????????????????￡???????????????
??????????(????????)?????????4?????????4?????(A12?????4?????????250??)????????4?λ??????????￡?????????????????
???????????????????????????????檔
PS??????????????????????????????????????????????????????????
???????
???????
