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??????????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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