??????
??????
??????
??????
??????
??????
??????
??????
??????
?????????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
??????????????????:18??????33.6%
??????????????????:18??????33.6%
??
????:
1????????:??????
2????????
3????50??????
4???????150??
5???????200
????
6
%
???:??