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

2??????????

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

4?????

5????????

????????????????????2?4? ?????????«?????»?,????????3???,???,???????????????30?????

???:?

???,?,??????

????????????????????,“??????????????????????????????30????,???”

????????????????????,30???,???3????9????,?????????,???????????????

??,?,??,??45??????????????????

??????????,???,??

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

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