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

2??????

3???????

4?????a5??

5??????????

???????????1??3?????????????????? (????? ???? ?????????)??????3????????

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

??????????????15????????????????,??????????????????????????????????????

???10???,????10?????“??”?????????,???,????????????????“??”???????

????????,???6.2????????,?,??????????????????550????,?????

?????,???,???????????????,??170??,???????

??,??????,????????????????????????????,????????????160????,??5??????,????????????????????6??????????,????10??????,?????????????????20%?(?????????) ????????????:????????????????????????