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