???

??????????????????????????2040??20?????????????????????PA?????50 ???????????
???????????????????????????
?????????
1?????????????
2???????????????????
3???????????
4????????
????????????????????????????????????  

?,,??,???????,???,??? (?)?:????,???????,???,?????,():???????????????,():??????,?()?:??,?,60%?()?:????,???????,??,??;?,??????;??????,?,????,????,??????,?():????,()?:???????????,??????????,??;?,??,??,??,??,????,?,?????,??????,?,??,???,??????,??,????? (?):???,??,????,????1.?,?:????:?20,15,?15,9,??9,??9...

?????1??????2????????????3?????????????????????
?????1?23???????

1??????????????
2?????????????????
3??????????
4???????????????????????
5???
6???????????????????????????????????????????????????
????

??????????????????????????????

????????????????????????????????????????A?D????????

????????????????????????????

????????

1.???????????

2.?????????????????????????

3.????????????????

4.???????????????

5.???????????????????????????

6.???????4%??45?...