????????????????? ??????????????? ?????????6??7????
?????????1-9???????????·??? ???????????
???????1??2?????12???????
???????2??3?????42???????
???????3??4?????120???????
???????4??5?????280???????
???????5??6?????600???????
???????6??7?????1100???????
???????7??8?????1400-1700???????
???????8??9?????2000-2400???????
?????????????????????????????????????????????????????????????????????д??????????????????????
1-4?????????????????????????????y??????
??????????????????????????????200?????????????????????????????400?????????????????????????0.8%?????????????????????????????
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