???:????
??“??????????”
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
???????
??????
??????
??????
??????
??????
??????
??????
??????
??
????1400??? “??????????????”??
????1400??? “??????????????”??
??
????:
1???????????:????????
2????????????
3???????????
4????????
5???kb???
???:????
????
6
%
???:??