????:1???????100?????:??????????

2????????

3???????

4???????

5????????

??????????????????8????????????????????19??? ?????,?????8?19?18????????:

???????,8??19????20??????20????20?????,???????????????????????????????????????????????????????????????????????????????????????????????,????,????????????????????????????????????????????????(100~200??)???????????(??30~60??,????80????),???????

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

1.???????????;

2.????????????,?????;

3.?????????,?????,?;

4.????????????????????,?????? ???:???????????????????????????