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2????????
3????????????
4??????????
5???????
??????????????12????????????5???????????????? ??,??5??????????
?? ??????
??????????10?????(11?25???????12??4??),?????????5~15????,????????????????????????????????????????20~40????,??????????????????????50~70??;?????????????10~30??,???????????40~60????
???????????10????,????????????????????????????1~4?,?????????????
?? ???????????
???????10??????(12????5-14??),?????????????????10~30????,?????40~60????????????????;???????????????????5~8??,??10~15??????????
???:?????10?????????,????????????1~2?,????1~3?,???????
??????:?????????????????????:
5-7????,????,?2~4?,???6???,?????????4~5??;???????????????????????????;????????????,5-6????????????????,????????????????????????????????,???????????????????????
9??,????????????????????????????????????,???
10-12?????????,???
??????
???11-14????(12?15-18????????????),????,??????????????????????????2~5????1??,??2~3??
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1. ?
??10??,??????,???????????,?????????????????1~2?,????
2. ???????
??10??????????????,?????????????????????????????,??20~40????,??50???
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