??????? ???????????15.3?

????:????668??:?????9598??

??2??17???? (??? ??????????)????17?,??,2?13????????????16?,?????,?????????????72??15.3?,???????;??????????????????????????????????10???48??6.5?~10.9??????????????,???;????????????????????4???????????

??,????????????????? ???

?,??????????,????????????????????????????????????

?2??18??????2??22??,???,?????????????,?????????2???????19?????2????????????????20???????????,?,??????????,??????????????????????????????,??,??(?????????)

?????????????:????