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????:1?????????:?????
2???????
3??????????????
4????????
5??????????
????????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????,??????,???????(???????) ????:????????????