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

??

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