??????????????????????????????????????????????????????????????????Ч?檔?????????????????????????????????????
?????????????????????????????????????????????з?ú???ˉ????ú????????????????????????????????????????????????????????????????????
?????ο???????????????????????????
?????????????5.5?????????????????????3.5?????1.5?????0.5??
??????????3500??/???? 35?/???? ????35?÷3500??=1??/??
3.5??x1??=3.5??
????ú???1600??/???? 30?/???? ????30?÷1600??=1.87??/??
1.5??x1.87??=2.8??
??? 3000?/?? ??15??/??
0.5??x15??=7.5??
??????13.8??
?????????????????
??? 0.8?/???????С????25??
??????0.8?/??X25??X8С?/??÷45000??/??=0.36??
????????????????????
80?/????????8?? ???640?/??
????????640?÷45000??=1.4??
???????????0.5??
???????????????????1.57???????????????????????ο???
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