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

2??????????

3???????????

4?????3??400?????

5????????

??????????1?31?????,????,???????????????????,???????????????????????????

1???????????20?,??,?25%????,???2?1??????????????????

1?30??,??,????2???1?????????????25%??????????,?1?????????????????????30??(? ????? ??)

??:?????