????:1?????????:??????????

2?????

3???????

4???????

5??????

????6??????????17?? (?? ???????)?17???????,???????????,??6??????18???,??????,??

??,???“???”????????6???????15??,????????????,??,????,??“????”??????????

??,????????,19?????20??21????24??????????????,??,??150~250?,??400????????

??,18????,??;19??20????????,???????????????????????????????????????????????????????,??????????????(?40~90?)???(8~11??)??????;21?24??????????????????????,?????????????????????????,?????????????????19?????????20???,???

?,???,?????????,????????????,????????????????????????????????(??????) ??????:?????