?? ???????? 18???????????
????:1???????????:?????
2????????????
3????????KB???
4?????
5???????
????,??500??????,??,?????
????,??,?????????????????,?????????,?????????????????“??”,???????????????????????????????????????????????????????????????????????????????????????????,??,????“???”??????
??????????????????,????????????30????,?????????????????????????????????????????,?????????????????????,???(?????? ?????????? ?? ?? ??????)
??:??????