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

2???????????

3?600?????????

4????????

5????????

??8??19???(????)???????????????«???»????????????,??11??26???30?????????18???,???????100??????????,??500?,????????

??????????,?30%???????????????????,??500????????60%,???????????????,???

???,?????????????60?????????????????,???

???:??????????,????????????????????????????,??????????????????????100????????????????????

????,?????,????????????????????? ??????:?????????????????????