?? ?????:???,??????PB?
????:1????????:?????????
2?????
3???????
4????????
5????????????
????8???????8??????(??? ?)????8?4X100????,?????????????????????????38???24,??
????????????,?????????????????“00?????”?????????????4X100??????????????????????????,??????????,???????????????,???????
?????????????????,???37???47,??37?94,????????????38??04,??????????38?06?????????????????????38???????????24?????,???,??????,??????PB(???????????)???????????37????79?
???????,?,??????????,???,???????“?,??PB????,?????,??????????” ??:??