?????????? ????10????????

??????2?????????????8??(?????? ??)??????,??8?????

???????????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??,??????,???(???????) ??????????????:????????????