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

??

??:???????????,??????????,??????????????