??μ??????????????????
?????????? ???????[ 2010/2/21 9:31:08 ] ????????
???
1????????м?????????????????????????????????繤?????????????
2???????????????????????????????Ч????????????и?????????????????£??????????
??2?????????????????????????????????????????????????5??6?????
?????????????????????????????????????????????????????0.5??1???????????????????????????
???????????????????????????ú??????
????????в??????????????????????????????????????????????????????????
?? ROI > (5-1)/5 X = 80%
????????????????????????????????????????????????????????????????????????????????????????????????????
??3??????????????????????????????????????????????1.5???????????????????????? >4?????
?????ù????ROI < ??1.5-4??/1.5 X = ??166.7%
???
1????и??ü????????????????????Ч????
2???????ù??????????????????????????????????????????????????????????????????????????????Ч?棬?????????á?
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11