??
?2????????????17????????????? (?? ?)??17???,?,2??13???????????16???,???????????????????????,???72??15.3?,??;???????????????10??????????48????????6.5?~10.9???????????,????????????????;??????????????????4????????
?????,???,???????????????????
??2?18??????????2?22???????????,?,??????????????????,???2???????19???2??????????????????20?,????????????????????,??????????????,????????????????????,????,????(?????????????????)
????:?????????????
???????????????? ???????15.3??????????????