?? ???????????????
????:1???????????:?????
2??????????
3??????????
4??????????
5?????????
?????????????????6???15?????????? ????,??????????????????6??????????????15????10?????:??,6??15???????????14?16????????????????????14????????????,????????????????????????????????????????????????????????????,???????,?????????????????????(100~200?)?????????????????(?????????30~50????,??????70????????????????),??????
????:
1????????????;
2?????,?????????????;
3???????????,?????,?;
4???????????????,???
??:???