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??????????8??,2????????8????????~9??,??????,??8~11?,???12~15?;?????17~20?,????????22~25??

???????????????????:?8??5~6???????????7~8?????,?;8??~9??5~6????????????????7??,??????;10?5????6~7?,?????????????

?????????,???????????8?????????????10????????IV??(????):?,???????????????????????4.5~5.8??????????????????3.5~4.5????????????????????????????????????????????2.0~2.5??????????????????????????????????????????????2.0~3.4???,?????,????(??????) ????????:???

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