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?????8????8??50?????:??,??8?9??,????????????????5??????????10??,????????????????

??5????8???9???,???

????????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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