???:???
??“????600?????”????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
??????????????????????
??????????????????????
??
????:
1?????600?????:????98?
2???????????
3?????????????
4?????150??
5?????vx
???:???
????
6
%
???:??