?? ???1000???????????
????:1??????:??????
2???????
3??????????
4?????????
5??????
????10????????25?? (? ??)???25??????????,??12???,???1000??????
????????????6??????30??,???????????????,??,?????????????,10??1????15.5?????,???????,????????
??????,????????????????????????,????????????????“??”,??“??+???”??,????6?????,?????????,???????????????????????????????????????????“???????????”?,????(??)
????????????????:???????????????????