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

2???????

3??????

4???????

5?????????

????????????????10???????????????5? ?????75????????????,“??????”????????4?????????,???????1000???????????????????????????????

????????75??,“??”??10??4???????????????????????? ?????

???????????????????,“???”???,???75????????????????????“??????????”???????,??????????????????????????????????????????,??????,??

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

???,????1000???????????????????????,??,????????????????????,??????????????????

??,????????????????????????????“???????”????????????,??????????????????????????,???????,?????????????(??)

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